10 Best Liquid Roof Repair For Felt Roofs in The UK

Last updated on 02/08/2025

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Resincoat Liquid Rubber Roof Coating, Waterproof Sealant for Roofing, DIY Friendly Repair, Quick Drying Leak Seal Technology, Long-term Performance, One-Coat Outdoor Roof Paint, Black, 5 Litres

Why We Love It

DIY-friendly with one coat application.
UV stable, preventing discolouration.
Offers superb, cost-effective coverage.

Main Highlights

Easy DIY Friendly Application - No need for multiple coats and priming – Resincoat Liquid Rubber Waterproof Coating requires just one easy application with brush or roller, saving you time and energy while delivering professional-quality results.
Advanced Waterproofing Solution - Formulated to last, Resincoat Liquid Rubber is ideal for repairing flat or pitched roofs and other surfaces on substrates such as concrete, brick, asphalt, GRP, metal, felt, OSB and more.
Formulated for UK Weather - Manufactured in the UK and designed to withstand prolonged exposure to typical UK weather conditions with UV stability protecting from sunlight and discolouring.
Flexible Waterproof Membrane - Superb adhesion and efficient one-coat application create a seamless waterproof membrane with high flexibility and elasticity to last for 10 years or more. Apply and enjoy reliable waterproofing.
Reliable, Long-term Performance - Trust in the 10-year life expectancy of our waterproof sealant paint to keep your roof leak-free and corrosion-resistant. From emergency repairs or routine maintenance, Resincoat Liquid Rubber Roof Coating delivers enduring results for both DIY enthusiasts and industrial users.

All-rounder for various applications.
Easy one-coat application process.
Environmentally friendly and safe.

Main Highlights

ALL-PURPOSE BLACK WATERPROOF SEALANT – UniBase MS delivers strong, flexible sealing for roofs, gutters, bathrooms, joints, cracks, and outdoor surfaces. Creates a durable waterproof barrier on a wide range of materials.
FAST LEAK FIX FOR ROOFS, GUTTERS & BATHROOMS – Designed as a powerful leak sealer and water leak sealant, it quickly stops leaks and repairs cracks in roofing, guttering, wet rooms, and external structures.
LONG-LASTING WEATHER & UV PROTECTION – Forms a watertight, flexible seal that withstands heavy rain, UV rays, temperature swings, and environmental stress. Ideal for roofing and outdoor repairs.
EASY APPLICATION ON WET OR DRY SURFACES – Ready-to-use formula. Simply apply by brush or roller without primer. Adheres to concrete, metal, roofing felt, tile, plastics, wood, and more.
STRONG, FLEXIBLE, RELIABLE – Manufactured to strict EU standards. UniBase MS offers professional-grade sealing performance for both DIY and commercial waterproofing and leak repair projects.

Polar Specialist Coatings

Polar Black Felt Seal - 2.5 Litre - Instant Waterproof Roof Sealant - Ideal for Flat or Pitched Felt, Shed & Garage Roofs - Easy to Apply

Free Shipping

Why We Love It

Instant waterproof sealant solution.
Easy one-coat application.
Provides long-lasting protection.

Main Highlights

Waterproof Seal: Quickly address emergency leaks or cracks with our easy-to-use outdoor sealant. Apply it directly to the affected area of your felt roof, whether it’s on a garage, shed, or another structure. The black sealant forms an immediate waterproof barrier, creating a durable membrane that effectively keeps out damp and water.
One-Coat Repair: Save time with Polar FeltSeal, which delivers a reliable fix with just one coat. Ideal waterproof sealant for quick and effective repairs on various surfaces, it provides instant waterproof protection with minimal effort. Each litre covers up to 1㎡, ensuring dependable coverage exactly where you need it.
Multi-Surface Compatibility: The ideal solution for instant waterproofing of felt roofs on sheds, garages, or caravans. Formulated specifically for optimal performance on flat or pitched felt roofs. For other surfaces such as drainpipes, gutters, asphalt, metal, brick, and concrete, use Polar LeakSeal for effective waterproof protection.
Instant Protection: Formulated for tough, hard-wearing and instant protection, this waterproofing sealant is perfect for urgent repairs or maintenance. It provides lasting protection for cracked surfaces and performs reliably in all weather conditions, ensuring peace of mind.
Easy Application: No primer is needed before applying Polar FeltSeal. Simply apply it directly for instant waterproof protection. Ensure the affected area is clean, free of moss, debris, and any surface water, oil, or grease. Depending on the size of the area, use a brush or roller for application. It will be touch dry within 3-4 hours.

Roofix 20/10 (Multisurface) Roof & Gutter Repair 5 Litre Black, Grey or White (Grey)

Why We Love It

Instant waterproofing for leaks.
Works in damp conditions.
Over 10 years protection.

Main Highlights

For exterior use on flat roof areas, gutters, lead flashing, slates, asbestos, cement, metal, asphalt, old roofing felt, bay window and porch areas
All-weather product - can be applied even in damp conditions
Excellent flexibility and durability - Exceptional adhesion to virtually any roofing material
Does not require special primers, and can provide long term protection in excess of 10yrs
Specifically developed to provide instant waterproofing for leaking roofs

SIRAMICO COATINGS Rapid Roof Repair Paint - Instant Waterproof Leak Sealer | GREY 2.5 Litres | Perfect for Flat and Pitched Felt, Shed & Garage Roofs | Easy to Apply & Fast Dry

Why We Love It

Durable and resilient finish.
Ready to use application.
Instant waterproof protection.

Main Highlights

DURABLE PROTECTION - Rapid Leak Repair Paint has a tough and durable finish suitable for immediately sealing damaged and leaking roof surfaces such as flat roofs, felt, bitumen, garages, sheds etc. Durable and resilient, it protects against damage from the elements.
READY TO USE - Rapid Leak Repair Paint is ready to use, no primer required before application. Easy to use, simply apply Leak Repair Paint immediately for instant waterproof protection. Thoroughly clean the affected area of moss, debris and surface water, oil or grease before starting.
APPLICATION - Apply Siramico's The Rapid Leak Repair Paint by brush or roller. The drying time is between 15-30 minutes. One coat is sufficient.
PROFESSIONAL GRADE FINISH - The Rapid Leak Repair Paint gives a smooth professional looking finish with instant protection. The fast drying formula ensures minimal downtime. Ideal for both domestic and commercial use, it provides a reliable solution to all your waterproofing needs.
INSTANT PROTECTION - Designed to be tough and provide instant protection, this sealant is perfect for emergency repairs or maintenance to drains, gutters and roofs. Provides long lasting protection to cracked surfaces in all weather conditions.

Roofix 20/10 Multi-Surface | Roof & Gutter Repair | Instant Waterproofing Solution for Flat Roofs and guttering | Black, Grey or White (Black) | 5 litres

Why We Love It

Superb flexibility and longevity.
Easily applicable on roofs.
Generous coverage ratio.

Main Highlights

Easy to apply
Excellent flexibility and durability
Can be applied to virtually any roofing material (not rubber)
Can last in excess of 10 year
Coverage is approximately 1 litre per m², nb corrugated & porous surfaces have a lower coverage

Everbuild Evercryl One Coat Instant Waterproofing – Suitable for Roofs, Gutters and Gulleys – Grey – 5kg

Why We Love It

Quick and easy to use.
Superior sunlight resistance feature.
Instant waterproofing ability.

Main Highlights

QUICK & EASY TO USE – This resin-based, fibre-reinforced roof repair compound covers in one coat with no primer needed. It dries smoothly with no additional curing needed.
VERSATILE – Effective on all common roofing surfaces and types including concrete, fibre/cement, roofing felt, mastic asphalt, slates and brickwork. It's also suitable for on gutters and gullies.
INSTANT WATERPROOFING – Provides instant roof repair even in wet conditions and on wet surfaces. Can be applied in temperatures down to -5°C.
SUPERIOR SUNLIGHT RESISTANCE – Formulated from lightfast acrylic polymers to withstand sunlight for longer periods than traditional bitumen coatings.
PRACTICAL – Fast and easy to apply. Only a one-coat brush application is required to give instant and total water protection, even in areas subject to ponding.
MULTIPLE SIZES AND COLOURS – Available in Grey 1kg, 2.5kg, 5kg and 20kg tins. Black 2.5kg and 5kg tins. White 5kg tin and Translucent 1kg and 5kg tins.

Ronseal HPRSBL4L Thompsons High Performance Roof Seal Black 4 Litre

Why We Love It

Weatherproofs for extreme conditions.
Protects against UV radiation.
Prevents cracking and splitting.

Main Highlights

The Thompsons RSLHPRSBL4L Roof Seal Black comes in the following:
The 10 year formulation is designed to flex with the natural movement of the roof protecting the membrane from cracking and splitting over time
UV light stable iron oxide pigments provide a protective shield against harmful UV radiation ensuring 10 year weatherproofing performance under extreme conditions

SmartSeal Liquid Roof Repair Black (1 Liter) - Easy to Apply on Flat Roofs, Gutters, Lead Flashing, Metal, Slate, Concrete, Asphalt & Roofing Felt

Why We Love It

Multi-purpose waterproofing for leaks.
Ideal for various surfaces.
Simple to apply.

Main Highlights

ALL-PURPOSE WATERPROOFING - SmartSeal Liquid Roof Repair is a multi-purpose fibre reinforced compound for the rapid repair and waterproofing of leaks on roof and other external hard surfaces
EXTERNAL USE ONLY – Specially formulated for use on flat roofs, gutters, lead flashing, metal, slate, asbestos, concrete, asphalt and roofing felt
EASY TO APPLY - Clear the affected area of moss and debris and remove any surface water, oil or grease. Apply by brush, trowel, soft broom or squeegee depending on size of the area affected. Avoid walking on coated areas until fully cured (approx 2-3 days)
COVERAGE - 1m2 per litre on flat surfaces

Polar Specialist Coatings

Polar Black Felt Seal - 1 Litre - Instant Waterproof Roof Sealant - Ideal for Flat or Pitched Felt, Shed & Garage Roofs - Easy to Apply

Free Shipping

Why We Love It

Waterproof seal for emergencies.
One Coat repair solution.
Easy and specific application.

Main Highlights

Waterproof Seal: Quickly address emergency leaks or cracks with our easy-to-use outdoor sealant. Apply it directly to the affected area of your felt roof, whether it’s on a garage, shed, or another structure. The black sealant forms an immediate waterproof barrier, creating a durable membrane that effectively keeps out damp and water
One-Coat Repair: Save time with Polar FeltSeal, which delivers a reliable fix with just one coat. Ideal waterproof sealant for quick and effective repairs on various surfaces, it provides instant waterproof protection with minimal effort. Each litre covers up to 1㎡, ensuring dependable coverage exactly where you need it
Multi-Surface Compatibility: The ideal solution for instant waterproofing of felt roofs on sheds, garages, or caravans. Formulated specifically for optimal performance on flat or pitched felt roofs. For other surfaces such as drainpipes, gutters, asphalt, metal, brick, and concrete, use Polar LeakSeal for effective waterproof protection
Instant Protection: Formulated with reinforced fibres for tough, hard-wearing, and immediate protection, this waterproofing sealant is perfect for urgent repairs or maintenance. It provides lasting protection for cracked surfaces and performs reliably in all weather conditions, ensuring peace of mind
Easy Application: No primer is needed before applying Polar FeltSeal. Simply apply it directly for instant waterproof protection. Ensure the affected area is clean, free of moss, debris, and any surface water, oil, or grease. Depending on the size of the area, use a brush or roller for application. It will be touch dry within 3-4 hours

8.9

Excellent

We scanned 1467 products

We reviewed these offers relevant to the Liquid Roof Repair For Felt Roofs within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Resincoat, Pandacoat, Polar Specialist Coatings, Roofix, SIRAMICO COATINGS, Flag Paints, Everbuild, Ronseal, SmartSeal, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Liquid Roof Repair For Felt Roofs in the market, we considered we took a deep dive into 7336 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Resincoat Liquid Rubber Roof Coating, Waterproof Sealant for Roofing, DIY Friendly Repair, Quick Drying Leak Seal Technology, Long-term Performance, One-Coat Outdoor Roof Paint, Black, 5 Litres. We love many things about this product by Resincoat. What sets it apart from the competition is DIY-friendly with one coat application. , UV stable, preventing discolouration. , Offers superb, cost-effective coverage.
The best value product for most shoppers and where user satisfaction is continuously the highest is Waterproof Black Sealant | Universal Leak Sealer for Roofs, Gutters, Bathrooms & Outdoor Joints | Stop Leak & Repair Cracks Instantly | Durable Waterproof Coating | UniBase MS | Made in EU (5.7 kg) by Pandacoat based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Liquid Roof Repair For Felt Roofs and the best cost-to-value ratio is Polar Black Felt Seal - 1 Litre - Instant Waterproof Roof Sealant - Ideal for Flat or Pitched Felt, Shed & Garage Roofs - Easy to Applyat Polar Specialist Coatings with a % discount.
Our list of the best Liquid Roof Repair For Felt Roofs is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Liquid Roof Repair For Felt Roofs in The UK

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We scanned 1467 products

We concluded that: