10 Best Rubber Sealant in The UK

Last updated on 27/06/2025

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

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Why We Love It

Impressive flexibility and UV stability.
Applies easily in dry conditions.
Environmentally friendly, odor-free solution.

Main Highlights

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
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!
CONVERSION - 1 US Gallon is equal to 0.83 UK Gallons - 5 US Gallons are equal to 4.16 UK Gallons
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
Packaging may vary

Gorilla Waterproof Coat & Seal Black 946ml

20% OffFree Shipping

Why We Love It

Flexible and weatherproof protection.
Stops and prevents leaks.
Suitable for indoor and outdoor.

Main Highlights

*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.
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.
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.

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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Why We Love It

Highly flexible with 900% elongation.
No mixing required, easy application.
Safe for humans and pets.

Main Highlights

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
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
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
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

Liquid Waterproof Sealant Clear, TUFINEIN Invisible Anti-Leaking Sealant Agent, Transparent Waterproof Coating Water-Based Indoor & Outdoor Roofs, Walls, Garden Anti Leakage Agent (2 KG)

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Why We Love It

Waterproof and anti-leakage.
Indoor and outdoor usability.
Durable and high temperature-resistant.

Main Highlights

Waterproof Coating Clear Material: Waterproof anti-leakage agent is a water-based coating, does not contain solvents, volatile organic compounds. Waterproof coating is semi-transparent before use, after application and curing for the transparent waterproof sealing membrane.
Waterproof Insulating Sealant Glue Use Scenario: Waterproof sealant outdoor can be used indoors and outdoors. Roofs, walls, basements, sheds, gardens, gutters, skylights, pipes, bathrooms, chimneys, window sills.waterproof roof sealant is suitable for wood, indoor and outdoor concrete structures, brick walls, metal, ceramics and so on.
Waterproof Repair Sealant Performance: Transparent liquid adhesive forms a colorless dense waterproof coating, insulating air, water and moisture. Waterproof paint for outdoors is resistant to high and low temperatures, uv stability, to achieve a durable seal, waterproof, protect items, and maintain aesthetic.
Clear Waterproof Sealant Usable Area: 2-3 even coats per 1kg of invisible waterproof sealant, covering approximately 14 square feet, 1.3 square meters. Waterproof anti-leakage agent can be applied by brush, roller, pouring, etc. Cross-apply, 24 hours between coats, for a long-lasting waterproof sealing membrane.
Water Proof Sealant Clear Tip: Transparent waterproof glue for use in sunny, dry weather at 5˚C/41˚F or higher. Invisible waterproof sealant is applied over a width of greater than 15cm at the correct point of leakage. Low temperatures, application thickness. Cold temperatures, application thickness, and humidity will extend the curing time.

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)

10% OffFree Shipping

Why We Love It

Instant leak protection guaranteed.
Versatile for any surface.
Environmentally friendly and safe.

Main Highlights

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!
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!
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.
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!
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.
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!

Tapel Liquid Rubber Waterproof Sealant - 3X Stronger- Black 1L - Professional Grade Roof & Concrete Coating, Indoor/Outdoor Leak Repair, Crack Filler, Weather-Resistant Protection

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Why We Love It

Forms solid waterproof membrane.
Effortless application and self-leveling.
Adaptable to extreme weather.

Main Highlights

✔ 🔧 MULTI-SURFACE ARMOR PROTECTION: Tapel's Black liquid rubber forms an impenetrable waterproof membrane for roofs, concrete foundations, metal gutters, wooden sheds, PVC pipes, and more. Bonds instantly to stop active leaks while preventing future cracks – even in -40°F to 300°F extremes.
✔ ⚡ DIY-FRIENDLY INSTANT SEAL TECHNOLOGY: No mixing, no tools – apply like thick paint with brush/roller/pour method. Self-leveling formula fills hairline cracks (<1mm) automatically. 90% cure in 2hrs (50°F+), walkable surface in 24hrs.
✔ ?️ 360° WEATHER WARRIOR DEFENSE: UV-resistant elastomeric coating flexes with seasonal expansion/contraction. Passes 1000hr salt spray test, withstands torrential rains, ice dams, and pool chemical splashes.
✔ ✅ ECO-SAFE & HIGH-YIELD COVERAGE: Low-VOC water-based formula safe for fish ponds and greenhouse use. 1kg covers 2m² (1 coat) – 30% more efficient than asphalt-based products. Remains pliable for 5+ years without cracking.
✔ 🛠️ Application Tip: Extended periods of rain and cool weather can delay the curing process of waterproof adhesives. It's advisable to apply the waterproof glue during clear, sunny conditions and in an environment that remains relatively dry both before and after application. For optimal performance, the liquid rubber sealant should be applied in temperatures of 10˚C/50˚F or above, including the temperatures overnight.

Gorilla 84756 Waterproof Coat & Seal Black 473ml

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Why We Love It

Superior sealing power.
Thick, durable coat.
Elegant black finish.

Main Highlights

Easy to use
Value for money
Design & durable

Works on various surfaces.
Superior oil resistance.
Endures extreme temperatures.

Main Highlights

【ALL-POWERFUL】This silicone gasket maker can work on all metal, such as stainless steel, aluminum, brass even it is plated or contaminated by minor oils. Also it works on glass, wooden object and anywhere need to seal. They will set completely after 24H and be disassembling.
【APPLYING OCCASION】Ideal for automotive, motorbike, all kinds of metal, oil pans, exhaust manifolds, water pumps, timing covers, differential covers, drive housings, oil pans, valve covers, thermostat housing, mechanical assemblies, machine equipment, 3D printer and oven doors.
【WONDERFUL PERFORMANCE】This RTV (Room Temperature Vulcanized) Silicone gasket maker is more oil resistant than conventional silicone, more flexible than cut gaskets. Safe, low odor and non-corrosive with superior adhesion, endure temperatures up to -60º C ~ 280º C.
【HOW IT WORKS】Clean the surface of gasket or o-ring, coat our sealant on the gasket and put it where it is. It will form a tough and waterproof seal between tiny gap when the product is exposed to the moisture in air. It will not shrink, drip, run, leak and crack, resists any weather.
【HEAVY DUTY】Our RTV silicone is great for working on many tasks. Better than traditional glues and epoxies. Definitely a different odor but maybe that has something to do with its superior performance. Perfect for oil-resistant gaskets on motorcycle, various electrical applications as an insulator with high temperature bond strength and other miscellaneous application.

Hemway - Construction All-In-One Hybrid Polymer Sealant & Adhesive - Jet Black | Anti-Mould, Waterproof & Paintable | 300 ml

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Why We Love It

Mould resistant and waterproof.
Flexible and ultra-high strength.
Odourless and environmentally friendly.

Main Highlights

HYBRID POLYMER TECHNOLOGY: All-in-one technology combines the flexibility of silicone, with the paintability of acrylic caulk & the high-strength seal of adhesives; ideal for construction, renovation, finishing & fixing. Hemway is a British brand and we manufacture our products to the highest standards of quality.
VERSATILE USE: Delivers a jet black finish on wood, glass, plastic, metal, PVC & concrete, plus compatible with water-based paints; an ideal floor, tile, bath, window, wall, door, shower, toilet, roof & gutter leak sealant..
ANTI-MOULD & WATERPROOF: Our unique non-shrink formula is anti-mould, waterproof, weatherproof, chemical & UV resistant, offering a durable, long-lasting finish that is resistant against fading & stains.
ECO-FRIENDLY: This vegan & cruelty-free adhesive & sealer is more environmentally safe than other silicone alternatives; a solvent-free, odourless, non-toxic & low VOC product.
QUICK CURE & HIGH COVERAGE: Covers a 6 mm bead x 9.25 mm length & fast curing within 24 hours at 23°C, with 50% R/H; provides resistance from -50°C to 120°C, making it suitable for many conditions, including high-humidity areas.

Gorilla Waterproof Coat & Seal Clear, 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles, Brick, Wood, Metal, Concrete, Stone, Rubber, Plastics*

37% OffFree Shipping

Why We Love It

Flexible and weatherproof protection.
Stops and prevents leaks.
Indoor and outdoor versatility.

Main Highlights

*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.
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.
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: Perfect 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.

8.7

Excellent

Save 37%

We scanned 288 products

We reviewed these offers relevant to the Rubber Sealant 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 Liquid Rubber, Gorilla, Tufinein, Pandacoat, Tapel, Realth, Hemway, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Rubber Sealant in the market, we considered we took a deep dive into 1441 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 Liquid Rubber Waterproof Sealant - Leak Repair Indoor and Outdoor Coating, Water-Based, Easy to Apply, Black, 3.78 Litres. We love many things about this product by Liquid Rubber. What sets it apart from the competition is Impressive flexibility and UV stability. , Applies easily in dry conditions. , Environmentally friendly, odor-free solution.
The best value product for most shoppers and where user satisfaction is continuously the highest is Gorilla Waterproof Coat & Seal Black 946ml by Gorilla based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Rubber Sealant and the best cost-to-value ratio is Gorilla Waterproof Coat & Seal Clear, 473ml - Weatherproof Liquid Sealant | Stops & Prevents Leaks | For Roof Tiles, Brick, Wood, Metal, Concrete, Stone, Rubber, Plastics*at Gorilla with a 37% discount.
Our list of the best Rubber Sealant 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 Rubber Sealant in The UK

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We scanned 288 products

We concluded that: