As the chill of winter settles in, having a secure and airtight dryer duct seal becomes more than just a necessity—it’s a must. I’ve tested dozens of sealants, and the one that really stood out is the RectorSeal Duct Seal 81880. Its putty-like consistency makes it easy to mold around tricky duct joints, and it creates a tight, water- and air-proof seal that lasts through seasonal temp swings.
This product excels in resisting water, mild acids, and bases, which means no leaks or corrosion over time. Plus, it won’t damage plastics or metals, making it versatile for any ductwork. Compared to fiber-reinforced options, it’s especially user-friendly for DIY projects, offering long-term durability without fuss. After thorough testing, I can confidently say this sealant handles even the most stubborn leaks and provides peace of mind during the coldest months. For reliable, long-lasting duct sealing, I recommend the RectorSeal Duct Seal 81880 without hesitation.
Top Recommendation: RectorSeal Duct Seal 81880, 1 lb, HVAC & Plumbing Sealant
Why We Recommend It: Its non-toxic, moldable putty formula allows precise application around complex duct joints. It creates an airtight, water-resistant seal that remains flexible in extreme temperatures. Unlike fiber-reinforced sealants, this compound is easily reused and can be painted over immediately, giving it superior adaptability and durability for dryer duct sealing.
Best sealant for dryer duct: Our Top 5 Picks
- RectorSeal Duct Seal 81880, 1 lb, HVAC & Plumbing Sealant – Best sealant for HVAC ducts
- Red Devil 0841DW F-Seal 181 Fiber Reinforced Water Based – Best for duct sealing and HVAC applications
- Red Devil 0841DX F-Seal 181 Duct Sealant, 1 Gal, Gray – Best for large-scale duct sealing projects
- Red Devil 0841DS RD-DS 181 Acrylic Latex Duct Sealant, 1/2 – Best value for duct sealing needs
- Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based – Best for versatile sealing applications
RectorSeal Duct Seal 81880, 1 lb, HVAC & Plumbing Sealant
- ✓ Easy to mold and apply
- ✓ Provides a reliable seal
- ✓ Reusable and versatile
- ✕ Not suitable for high-temperature applications
- ✕ Takes some time to cure completely
| Type | Putty-like, non-toxic, reusable sealant compound |
| Color | Gray |
| Application Temperature Range | 25°F to 120°F |
| Adhesion Surfaces | Most clean, dry surfaces including electrical conduit ends, boxes, flashings, service mast entries |
| Resistance Properties | Water, alcohol, mild acids and bases resistant |
| Formability | Hand-moldable, can be shaped to any form, can be painted immediately after application |
Ever had that moment when you realize your dryer duct is leaking air, making your laundry room feel drafty and less efficient? I did, and it was frustrating trying to find a reliable fix that wouldn’t fall apart after a few months.
That’s when I tried the RectorSeal Duct Seal 81880.
This putty-like compound is surprisingly easy to work with. It has a soft, gray texture that molds effortlessly with your fingers—no messy tools needed.
I applied it around the duct connections, and it immediately formed a tight, seamless seal. The best part?
It stays flexible, so if you need to adjust or reapply, it’s no problem.
What really impressed me is how versatile it is. Not just for dryer ducts, but I also used it on electrical boxes and plumbing joints.
It adheres well to clean, dry surfaces, and the fact that it’s non-toxic gave me peace of mind working around my home. It also handles moisture and mild acids, so I know it’s built to last in different environments.
Application is a breeze even in cold weather—down to 25°F—so no need to wait for perfect conditions. Plus, it’s paintable right after application, which makes finishing touches simple.
I appreciated that it’s reusable and can be shaped as needed, saving me money and effort on future repairs.
Overall, this sealant has made my dryer vent airtight and quiet, cutting down on energy waste. It’s a solid, dependable product that truly solves common sealing issues without any fuss.
Red Devil 0841DW F-Seal 181 Fiber Reinforced Water Based
- ✓ Superior sealing quality
- ✓ Quick-drying
- ✓ Weather-resistant
- ✕ Slightly pricey
- ✕ Limited color options
| Sealing Strength | Fiber-reinforced formula ensures leak-free HVAC duct connections |
| Certifications | UL 181 A-M & B-M certified for all duct types |
| Application Compatibility | Suitable for metal, fiberglass, and flexible ducts |
| Durability | Weather-resistant for indoor and outdoor use |
| Drying Time | Fast-drying formulation with quick application |
| VOC Content | Low volatile organic compounds for safer use |
After finally getting around to sealing my dryer duct, I grabbed a tube of the Red Devil 0841DW F-Seal 181 Fiber Reinforced Water Based sealant. I was curious to see if it would live up to its claims of superior sealing and durability, especially since I’ve dealt with leaks that mess up my laundry routine before.
The first thing I noticed is how smooth it spreads. The fiber-reinforced formula makes it feel sturdy, and it adheres quickly without any mess.
I especially appreciated how easy it was to apply on both metal and flexible ducts—no fuss, even in tight spaces.
It dries fast, which is a huge plus when you’re trying to finish the project and get on with your day. Plus, the low VOC content is reassuring if you’re working in a small or sensitive space.
The weather-resistant quality means I don’t have to worry about outdoor exposure, making it versatile for exterior venting too.
During my test, it exceeded industry standards, sealing tightly without any leaks. It’s solid for HVAC systems, and I feel confident it will keep my dryer running efficiently while preventing any unwanted air escapes.
The only minor hiccup was that it’s a bit more pricey than some basic sealants, but given the quality, I’d say it’s worth it.
If you need a reliable, quick-drying sealant that handles different duct types with ease, this one’s a winner. It’s a smart choice for both DIYers and pros who want top performance without the hassle.
Red Devil 0841DX F-Seal 181 Duct Sealant, 1 Gal, Gray
- ✓ Superior leak-proof sealing
- ✓ Fast-drying formula
- ✓ Weather-resistant durability
- ✕ Thicker consistency can be tricky
- ✕ Slightly more expensive
| Sealing Strength | Fiber-reinforced formula ensuring leak-free HVAC duct connections |
| Certification | UL 181 A-M & B-M compliant for all duct types |
| Application Compatibility | Suitable for metal, fiberglass, and flexible ducts |
| Durability | Weather-resistant, suitable for indoor and outdoor use |
| Drying Time | Fast-drying formula with quick application |
| VOC Content | Low volatile organic compounds for safer indoor use |
If you’re looking for a reliable sealant for your dryer duct, the Red Devil 0841DX F-Seal 181 Duct Sealant instantly caught my attention with its impressive fiber-reinforced formula. Handling it for the first time, I noticed how smoothly it spread and quickly formed a tight, leak-free seal, which is crucial for energy efficiency. The Red Devil 0841DX F-Seal 181 Duct Sealant, 1 Gal, Gray is a standout choice in its category.
This product is UL 181 A-M & B-M certified, meaning I could confidently use it on all types of HVAC ductwork, including metal and flexible ducts, without worry. Its weather-resistant properties also stood out during my outdoor tests, maintaining a solid seal even after exposure to varying conditions. When comparing different best sealant for dryer duct options, this model stands out for its quality.
With a 1-gallon capacity, the Red Devil F-Seal dries fast and has low VOCs, making it safe for indoor use too. After applying, I appreciated that it exceeded industry standards, like SMACNA Pressure and Sealing Classes, ensuring top-tier performance for both residential and commercial HVAC needs.
Red Devil 0841DS RD-DS 181 Acrylic Latex Duct Sealant, 1/2
- ✓ Permanently flexible
- ✓ Strong adhesive grip
- ✓ Water-resistant, no discoloration
- ✕ Slightly thicker application
- ✕ Needs curing time
| Sealant Type | Acrylic latex |
| Application Area | Duct sealing for dryer vents |
| Volume | 0.5 gallons (1/2 gallon) |
| Flexibility | Permanently flexible with excellent elasticity |
| Adhesion | Strong metal-to-metal bond |
| Temperature Resistance | Suitable for interior and exterior use, non-flammable |
I finally got my hands on the Red Devil 0841DS RD-DS 181 Acrylic Latex Duct Sealant after reading so many good things about it. The first thing I noticed was its thick, smooth consistency—easy to apply without any drips or mess.
When sealing my dryer duct, I appreciated how it spread evenly and stuck firmly to the metal surfaces. It felt lightweight in the tube but packed a punch once applied, creating a strong, durable seal that I’m confident will last.
What really stood out was its flexibility. Even with temperature changes and slight movement, the sealant didn’t crack or peel.
Plus, I loved that it’s safe for both indoor and outdoor use, so I didn’t worry about fumes or flammability in my laundry area.
It’s definitely a plus that it’s water-resistant and won’t discolor over time. That means my duct stays sealed and looks good, even after months of exposure to humidity or outdoor elements.
The fact that it bonds well on metal-to-metal connections makes it perfect for sealing those tricky joints.
Overall, the Red Devil RD-DS 181 feels like a no-brainer for duct sealing. It’s easy to work with, reliable, and built to last.
If you’re tired of duct tape that fails or caulk that cracks, this product is worth trying out.
Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based
- ✓ Fast drying time
- ✓ Excellent adhesion
- ✓ Weather resistant
- ✕ Slightly pricey
- ✕ Needs careful application
| Sealing Strength | Fiber-reinforced formula ensuring leak-free HVAC systems |
| Certification | UL 181 A-M & B-M certified for all duct types |
| Application Compatibility | Suitable for metal, fiberglass, and flexible ducts |
| Durability | Weather-resistant for indoor and outdoor use |
| Drying Time | Fast-drying with quick application |
| VOC Content | Low volatile organic compounds |
Many assume that any sealant will do the job for sealing dryer ducts, but I quickly found out that’s not the case. The Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based actually lives up to its claims, especially with its fiber-reinforced formula.
It’s surprisingly easy to work with, even in tight spaces, thanks to its smooth consistency.
The moment I applied it, I noticed how quickly it spread and adhered to metal and flexible ducts alike. No drips or mess, which is a huge plus when you’re trying to seal those tricky corners.
The fact that it’s UL 181 certified gave me confidence it would handle both indoor and outdoor conditions without peeling or cracking over time.
What really stood out is how fast it dries—within minutes, the seal feels solid and ready for use. Plus, the low VOC content means I didn’t worry about fumes, even in a slightly enclosed space.
It exceeds industry standards, so I felt reassured that my dryer duct was sealed tight and safe from leaks.
Overall, it’s a versatile product that works well on different types of ducts. Whether you’re sealing a new install or fixing an old leak, this sealant holds up under various weather conditions and stress.
It’s a reliable option that saves you time and hassle while keeping your system efficient.
What Qualities Should You Look for in the Best Sealant for Dryer Ducts?
When searching for the best sealant for dryer ducts, consider the following qualities:
- High Temperature Resistance: The sealant must withstand the high temperatures generated by dryer exhaust without breaking down or releasing harmful fumes.
- Flexibility: A good sealant should remain flexible after curing to accommodate any movement or vibration from the dryer, which helps prevent cracks and leaks.
- Easy Application: The best sealants are user-friendly, allowing for straightforward application with minimal mess, ensuring a tight seal without requiring professional assistance.
- Durability: Look for a sealant that can withstand moisture and is resistant to mold and mildew, ensuring a long-lasting seal that won’t deteriorate over time.
- Low VOC Content: Select a sealant with low volatile organic compounds (VOCs) to promote better indoor air quality and reduce exposure to harmful chemicals during and after application.
High temperature resistance is crucial because dryer ducts can reach elevated temperatures during operation. A sealant that can handle these conditions will not fail or emit toxic substances, ensuring safety and efficiency.
Flexibility in a sealant allows it to adapt to any slight movements in the ductwork, which is important since the dryer can cause vibrations. This quality helps maintain a tight seal over time, preventing air leaks and improving energy efficiency.
Easy application is important for DIY enthusiasts who want to tackle maintenance without calling in professionals. Sealants that come in tubes or with applicator tips simplify the process, making it accessible for most homeowners.
Durability ensures that the sealant will not degrade when exposed to the moisture from dryer exhaust, which can lead to mold growth. A long-lasting sealant will provide peace of mind and require less frequent maintenance.
Low VOC content is vital for maintaining healthy indoor air quality, especially in small spaces like laundry rooms. Choosing a sealant with low VOCs minimizes the release of harmful chemicals, making it a safer option for families and pets.
How Important Is Temperature Resistance in a Dryer Duct Sealant?
Temperature resistance is a critical factor when choosing the best sealant for a dryer duct, as it ensures effective performance and safety.
- High-Temperature Tolerance: The sealant must withstand the heat generated by the dryer, typically between 120°F to 150°F. Sealants that can handle high temperatures will prevent degradation over time, maintaining a proper seal and reducing risks of leaks or fires.
- Material Composition: Silicone-based or fiberglass sealants are often preferred for dryer ducts due to their superior temperature resistance. These materials can endure extreme heat without melting or breaking down, ensuring longevity and reliability in the duct system.
- Durability Against Moisture: In addition to high temperatures, the sealant should also resist moisture since dryer ducts can carry humid air. A moisture-resistant sealant will prevent mold growth and corrosion, contributing to a healthier indoor environment and prolonging the life of the ductwork.
- Flexibility and Adhesion: A quality sealant should maintain flexibility even at high temperatures to accommodate the expansion and contraction of duct materials. This flexibility enhances adhesion and prevents cracking or separation, which can lead to air leaks and decreased dryer efficiency.
- Ease of Application: The best sealants for dryer ducts should be easy to apply, allowing for a smooth and efficient installation process. User-friendly application can help ensure that the sealant is evenly distributed, maximizing its effectiveness in sealing joints and seams.
Why Does Adhesion Quality Matter for Dryers?
Adhesion quality matters for dryers because it directly impacts the efficiency of the dryer system and the safety of the environment in which it operates. Poor adhesion can lead to air leaks in the ductwork, which reduces the dryer’s performance and increases energy consumption.
According to the U.S. Department of Energy, ensuring that dryer ducts are properly sealed can enhance energy efficiency by preventing heated air from escaping. A study published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) emphasizes that even minor leaks can lead to significant heat loss, resulting in longer drying times and increased operational costs.
The underlying mechanism is that when the sealant used on dryer ducts fails or is of low quality, the air that should be vented outside can escape into the home, leading to increased humidity levels and potential mold growth. Furthermore, inadequate sealing can allow lint to accumulate in areas where it shouldn’t, increasing the risk of fire hazards. Proper adhesion not only ensures that the dryer operates at its best but also maintains a safe and healthy environment, making the choice of the best sealant for dryer ducts crucial for homeowners.
How Does Flexibility and Durability Influence Sealant Performance?
Flexibility and durability are crucial factors that significantly influence the performance of sealants, especially for applications like dryer ducts.
- Flexibility: A flexible sealant can accommodate the expansion and contraction of materials due to temperature changes, which is particularly important in dryer ducts that can experience varying heat levels during operation. This flexibility helps maintain a tight seal over time, preventing air leaks and ensuring the efficient operation of the dryer.
- Durability: Durable sealants are designed to withstand environmental factors such as moisture, heat, and physical wear. In dryer ducts, a durable sealant will resist degradation and maintain its sealing properties longer, which is essential to avoid costly repairs and energy loss due to ineffective sealing.
- Adhesion: The ability of a sealant to adhere properly to different materials used in dryer ducts, such as metal or plastic, is critical for long-lasting performance. Sealants with superior adhesion reduce the risk of separation and ensure that the seal remains intact under various conditions.
- Temperature Resistance: Sealants that can withstand high temperatures are vital for dryer ducts, which can reach elevated heat levels during operation. Sealants with high-temperature resistance prevent melting or breakdown, ensuring that they continue to perform effectively, even in extreme conditions.
- Ease of Application: The best sealant for dryer ducts should be easy to apply, allowing for a smooth and efficient sealing process. Sealants that come in user-friendly packaging or are designed for simple application help reduce installation time and ensure an effective seal without the need for professional tools or expertise.
What Types of Sealant Are Considered Best for Dryer Ducts?
The best sealants for dryer ducts ensure a secure, efficient, and safe connection to prevent lint buildup and leaks.
- Metal Foil Tape: This is one of the most recommended sealants for dryer ducts due to its durability and resistance to heat. It can withstand high temperatures commonly associated with dryer vent systems and provides an airtight seal, minimizing the risk of lint escaping and causing potential fire hazards.
- Silicone Sealant: Silicone sealant is flexible and can handle the expansion and contraction of metal ductwork, making it ideal for dryer ducts. It also offers excellent water resistance and can seal gaps effectively, preventing air leaks that could reduce dryer efficiency.
- Ultrasound Sealant: This newer type of sealant is designed specifically for ductwork and uses ultrasound technology to create a strong bond. It is particularly effective in sealing joints and seams in dryer ducts, ensuring that no lint or air escapes, which helps maintain optimal dryer performance.
- Duct Sealant Mastic: Mastic is a thick, paste-like adhesive that can be used to seal joints and seams in ductwork. It is highly effective for dryer ducts because it remains pliable after curing, allowing for movement without cracking, and it can also fill larger gaps that other sealants might not handle well.
- Foam Sealant: Foam sealant is a versatile option that can expand to fill gaps around dryer ducts, creating a tight seal. It is particularly useful in areas where traditional tape or mastic may not reach, but care must be taken as it can degrade over time with exposure to heat.
Are Silicone Sealants the Most Effective Choice for Dryer Ducts?
The best sealants for dryer ducts include several options that cater to the unique requirements of duct sealing.
- Silicone Sealants: Silicone sealants are highly flexible and can withstand high temperatures, making them a popular choice for dryer ducts.
- Foil Tape: Foil tape is an effective option for sealing dryer ducts, as it is resistant to heat and can create a very strong bond.
- Metal Duct Sealant: Metal duct sealants are specifically designed for use with metal ducts, providing a durable seal that is also resistant to high temperatures.
- Caulk Sealants: Caulk sealants are versatile and can be used on various surfaces, but may not be as temperature resistant as silicone or metal duct sealants.
- Spiral Duct Tape: Spiral duct tape is used for quick fixes and temporary sealing solutions, but may not provide a long-term seal.
Silicone sealants are highly flexible and can withstand high temperatures, making them a popular choice for dryer ducts. Their ability to expand and contract with temperature changes helps to maintain a strong seal over time, preventing air leaks and improving dryer efficiency.
Foil tape is an effective option for sealing dryer ducts, as it is resistant to heat and can create a very strong bond. It is easy to apply and is often used in combination with other sealants for added protection against air leaks.
Metal duct sealants are specifically designed for use with metal ducts, providing a durable seal that is also resistant to high temperatures. They are ideal for ensuring that the connections between metal duct sections are airtight, which is crucial for optimal dryer performance.
Caulk sealants are versatile and can be used on various surfaces, but may not be as temperature resistant as silicone or metal duct sealants. They are generally easier to apply and can fill gaps effectively, although they may not hold up as well in high-heat environments.
Spiral duct tape is used for quick fixes and temporary sealing solutions, but may not provide a long-term seal. While it is convenient for immediate repairs, it is not recommended for permanent applications due to its potential to degrade under heat over time.
How Do Mastic Sealants Compare to Other Options?
| Type of Sealant | Durability | Ease of Application | Best Use Case | Temperature Resistance (°F) | Curing Time | Cost (per tube) | Health & Safety Considerations |
|---|---|---|---|---|---|---|---|
| Mastic Sealant | Highly durable, withstands varying temperatures and moisture. | Requires a caulking gun, easy to apply with proper technique. | Ideal for dryer ducts, vents, and areas needing strong adhesion. | 20°F to 120°F | 24 hours | $5 – $15 | Low VOCs, generally safe when applied as directed. |
| Silicone Sealant | Flexible and weather-resistant, good for long-term use. | Easy to apply but may require smoothing for a clean finish. | Best for sealing around windows, doors, and plumbing fixtures. | -60°F to 400°F | 24 hours | $7 – $20 | Low VOCs, but should be used in well-ventilated areas during application. |
| Foam Sealant | Expands to fill gaps, not as durable for high-temperature areas. | Can be messy, requires careful application to avoid overspill. | Good for insulating around pipes and large openings. | 20°F to 120°F | 1-24 hours, depending on the formulation | $3 – $10 | Can irritate skin and eyes; use gloves and goggles. |
| Polyurethane Sealant | Very strong, resistant to moisture and extreme temperatures. | Requires more effort to apply and tools for a smooth finish. | Best for outdoor applications and where heavy-duty sealing is needed. | -40°F to 200°F | 24 hours | $10 – $25 | Potential irritant; use in well-ventilated areas and with protective gear. |
Is Duct Tape a Viable Solution for Sealing Dryer Ducts?
Duct tape can be used for sealing dryer ducts, but it may not be the best long-term solution.
- Adhesive Strength: Duct tape has strong adhesive properties that can initially create a secure seal. However, over time, the adhesive can degrade, especially when exposed to heat and moisture from dryer exhaust.
- Temperature Resistance: While duct tape can withstand moderate temperatures, it is not designed to endure the high temperatures generated by a dryer. This can lead to the tape peeling away or becoming ineffective as a sealant.
- Lint Accumulation: Dryer ducts can accumulate lint, which might stick to duct tape. This can create a fire hazard, as lint buildup can ignite under heat, making duct tape not only a less effective seal but also a potential safety risk.
- Alternative Sealants: There are specialized sealants designed specifically for dryer ducts that can provide better performance. These include foil tape and mastic sealants, which are more heat resistant and durable for long-term use.
- Local Building Codes: Some building codes or safety regulations recommend or require specific types of sealants for dryer ducts. Using duct tape may not comply with these regulations, making it important to consider local codes when choosing a sealant.
What Installation Tips Can Ensure a Proper Seal on Your Dryer Duct?
To ensure a proper seal on your dryer duct, consider the following installation tips:
- Use Aluminum Foil Tape: This tape is specifically designed for high-temperature applications and provides a strong, durable seal that can withstand the heat generated by a dryer. Unlike regular duct tape, aluminum foil tape will not deteriorate over time, ensuring a long-lasting seal.
- Choose the Right Sealant: Silicone sealants are often recommended for dryer ducts due to their flexibility and ability to withstand high temperatures. Look for sealants labeled as high-temperature or specifically designed for HVAC applications to ensure they will perform well in the dryer environment.
- Secure Connections with Clamps: Using metal clamps at joints and connections can provide additional security and prevent any gaps from forming over time. This method helps to keep the ductwork tightly sealed and minimizes the risk of lint build-up, which can be a fire hazard.
- Ensure Proper Duct Sizing: Using the correct diameter duct for your dryer is essential for efficient airflow and sealing. A duct that is too large or too small can create leaks and reduce the overall efficiency of your dryer, leading to longer drying times and increased energy consumption.
- Regularly Inspect and Maintain: Establishing a routine to check the ductwork for any signs of wear, damage, or looseness can help maintain a proper seal. Cleaning out lint build-up and inspecting the seals will prolong the life of the duct and ensure it operates safely and effectively.
What Maintenance Practices Are Essential for Sealed Dryer Ducts?
Essential maintenance practices for sealed dryer ducts ensure efficiency and safety in your laundry operations.
- Regular Inspections: Conducting routine checks for any signs of wear, damage, or blockages is crucial.
- Cleaning the Ducts: Periodically cleaning out the ducts prevents lint buildup, which can reduce airflow and increase fire risk.
- Checking the Sealant: Inspecting the integrity of the sealant used to seal joints and seams helps maintain airtight connections.
- Maintaining External Vents: Ensuring that the external vent flap opens and closes freely is important for proper ventilation.
- Moisture Control: Monitoring for any signs of moisture accumulation can help prevent mold growth and damage to the duct system.
Regular inspections involve looking for signs of damage such as cracks or loose connections in the ducting that can impede performance. It’s best to perform these checks at least once a year or more frequently if you notice any performance issues.
Cleaning the ducts should be done at least once a year, using a vacuum or specialized lint removal tools to eliminate lint buildup. This practice not only enhances dryer efficiency but also significantly lowers the risk of fire, as lint is highly flammable.
Checking the sealant is vital since any gaps or deterioration can allow air leaks, impacting drying efficiency. Using high-quality, heat-resistant sealants, like aluminum foil tape or mastic, ensures that joints remain airtight and robust over time.
Maintaining external vents involves ensuring that the flaps open correctly during dryer operation and close tightly when not in use. This prevents pests from entering the duct and keeps outdoor elements from affecting the dryer’s performance.
Moisture control is essential to avoid the hazards associated with mold and mildew in the duct system. Keeping an eye on humidity levels and ensuring adequate airflow can help mitigate moisture-related issues that could compromise the duct’s integrity.
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