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5 Best Liquid Rubber Waterproof Sealants of 2025

Last Updated - 23/08/2025

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Resincoat

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

Resincoat

£77.50

More Details
Main highlights
- 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.
- 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.
- 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.
£77.50
2

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Liquid Rubber

Liquid Rubber Waterproof Sealant - Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Black, 3.78 Litres

Liquid Rubber

£59.95

More Details
Main highlights
- Packaging may vary
- HIGHLY FLEXIBLE & DURABLE - Final membrane has over 1000% elongation preventing adhesion failure, and is UV Stable stopping the sun from degrading the product. Product remains tacky - not suitable for walking surfaces
- HIGHLY FLEXIBLE & DURABLE - Final membrane has over 1000% elongation preventing adhesion failure, and is UV Stable stopping the sun from degrading the product
- ENVIRONMENTALLY FRIENDLY - Liquid Rubber Waterproof Sealant/Coating is water based, containing no solvents, VOC's or harmful odors. Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus
- CONVERSION - 1 US Gallon is equal to 0.83 UK Gallons - 5 US Gallons are equal to 4.16 UK Gallons
- APPLICATION - Do not apply in wet conditions or within 24 hours of rain. Apply to a dry surface, free loose flaky paint and coatings or anything that would prevent adhesion. Typically cures within 24-48 hours!
£59.95
3
Best Value
16% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Gorilla
16% Off

Gorilla Waterproof Coat & Seal Black 946ml

Gorilla

£29.24

£34.99
(16% Off)

More Details
Main highlights
- STOPS & PREVENTS LEAKS: The self-levelling formula seals and protects by smoothly covering small gaps and cracks to create a weatherproof, watertight seal. The liquid is easy to apply – you simply brush it, roll it or pour it.
- INDOOR & OUTDOOR: Suitable for both indoor and outdoor use, offering reliable protection against water, air, and moisture for various surfaces and environments. Can be used for sealing small cracks indoor and out.
- GREAT FOR: Roofing, gutters, downpipes, windows/uPVC, external chimneys, and small repairs on caravans, providing effective sealing and protection. Not for flashing applications, pipes under pressure or for use inside firebox.
- FLEXIBLE & WEATHERPROOF: Gorilla Waterproof Coat & Seal liquid offers durable protection with its flexible and weatherproof formula, ensuring reliable defense against the elements for various surfaces and applications.
- *May not work for all types of plastic or rubber. Product is intended for localised usage, it is not designed to coat large surface areas.
£29.24
£34.99 (16% Off)
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Pandacoat

Liquid Rubber Universal Waterproof Sealant - Universal Sealant Indoor & Outdoor - Concrete, Metal & Wood, Flex Roof Leak & Metal Roof - Cold & Wet Weather - PandaCoat - Made in EU (1 kg)

Pandacoat

£22.99

More Details
Main highlights
- VERSATILE - Adheres to concrete, wood, metal, and more. Seals immediately, even on damp substrates. An excellent exterior waterproof sealant for universal application in any project!
- STOP LEAKS FAST – Premium European-quality waterproof sealant that provides instant, reliable protection. Designed for durability, it seals cracks and leaks effectively on any surface!
- FOR EVERY HOUSEHOLD - PandaCoat provides high-quality DIY solutions. UniBase MS is essential for sealing slurries, waterstop, and bitumen coating—the ideal all-rounder for lasting protection!
- ENVIRONMENTALLY FRIENDLY - Free from solvents and isocyanates, making it odorless and safe. UV-resistant, water vapor permeable, and weatherproof for reliable and eco-friendly bitumen sealant use.
- EASY TO APPLY - No priming is required! Just one coat with a brush or roller suffices. Ideal for exterior liquid plastic sealant. Use two coats for long-lasting protection on roof paint and sealing slurry.
- A REAL ALLROUNDER - The Panda Coat universal flex sealant works indoors and outdoors. Perfect for sealing cracks in metal roofs or flat roof waterproofing applications, roof repair, balconies and gutter. Ensures a durable, weather-resistant finish for extended roof lifespan. Ready for immediate use!
£22.99
5

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Liquid Rubber

Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black, 3.78 Litres

Liquid Rubber

£49.95

More Details
Main highlights
- VERSATILE CONCRETE CRACK FILLER: The professional-grade rubber coating and rubber waterproofing technology maintains flexibility in all temperatures, preventing future cracks and damage. This liquid rubber waterproof sealant provides superior adhesion to concrete, masonry, wood, metal, and foundation surfaces, making it an ideal choice for your DIY projects
- SUPERIOR FLEXIBLE SEALANT: Liquid Rubber's foundation sealer creates a permanent waterproof membrane for basement waterproofing, foundation leak repair, shower liners, and planter boxes. This professional-grade sealer delivers unmatched protection with 900% elongation, preventing leaks and water damage more effectively than traditional sealants
- MAXIMUM COVERAGE & PERFORMANCE: This high-build basement sealer goes on like waterproof paint - Interior basement surfaces: 50 sq ft/gallon (requires: 2-3 coats), Exterior concrete sealer outdoor surfaces: 20 sq ft/gallon (requires: 3-4 coats). Apply between 50°F-90°F. For complete protection, use the rubber sealant with Liquid Rubber Geo-Textile on joints and transitions
- IMPORTANT USAGE GUIDELINES: The water-based foundation sealer formula contains zero VOCs for safe indoor application. No mixing required! Apply by brush, roller, or professional sprayer as part of your basement waterproofing system. Not suitable for walking surfaces due to tackiness when cured
- FOR A WATERTIGHT SYSTEM - Use rubber sealant with Liquid Rubber Geo-Textile on joints and transitions, fill small cracks with Liquid Rubber Sealant & Adhesive, and bridge joints, seams, vents, and protrusions where movement may occur. Scroll down for full application steps
- COMPLETE BASEMENT WATERPROOFING SYSTEM: Surpassing basic concrete paint, concrete sealers, and standard waterproof agents, this waterproofing membrane is designed to seal and protect against active leaks and moisture, making it perfect for basement leak and foundation repair. Seamlessly compatible with self leveling concrete applications
£49.95

5 Best Liquid Rubber Waterproof Sealants of 2025

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

Liquid Rubber Waterproof Sealant - Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Black, 3.78 Litres

Gorilla Waterproof Coat & Seal Black 946ml

Liquid Rubber Universal Waterproof Sealant - Universal Sealant Indoor & Outdoor - Concrete, Metal & Wood, Flex Roof Leak & Metal Roof - Cold & Wet Weather - PandaCoat - Made in EU (1 kg)

Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black, 3.78 Litres

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