Top 10 Best liquid rubber in 2026

Last Updated - 6/6/2026

🏆Best Choice

Flex Seal

Flex Seal, 14 oz, Black, Stop Leaks Instantly, Waterproof Rubber Spray On Sealant Coating, Perfect for Gutters, Wood, RV, Campers, Roof Repair, Skylights, Windows, and More

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•The easy way to coat, seal, protect, and stop leaks fast! Once dry, can be painted any color
•Seeps into cracks and holes. Dries to a watertight, flexible, rubberized coating. Stays flexible and pliable; lasts many years
•Transform and protect virtually everything! Ideal for arts & crafts, projects & hobbies
•Protects surface from corrosion, can be used on wet or dry surfaces
•Will not sag or drip in the Summer heat. Will not crack or peel in the Winter cold

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$13.38

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Permatex

Permatex 81158 Black Silicone Adhesive Sealant, 3 oz. Tube, Pack of 1

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Professional Formula - This Black Silicone Adhesive Sealant Is A Sensor-safe, General Purpose Black RTV Sealant That Can Be Used Inside Or Outside For All Your Jobs
•Do It All- Seal, Bond, Repair, Mend And Secure Glass, Metal, Plastics, Fabric, Vinyl, Weather Stripping, Vinyl Tops, And More With This Black RTV Silicone Sealant
•Resist The Elements- Permatex Black Silicone Adhesive Sealant Is Waterproof And Flexible; Resists Water, Weather, And Vibration On All Your Applications
•Multipurpose Formula- With A Temperature Range From -75°f To 450°f (-59°c To 232°c) Black RTV Silicone Can Be Used All Around And Can Be Used To Protect And Repair Electrical Wiring
•Suggested Applications- Door Frames, Electrical Connections, Seams And Roofs, Vinyl Tops, Weather Stripping, Housings And Coverings, (not Recommended For Engine Gasket Applications)

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$5.88

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STAR BRITE

STAR BRITE Liquid Electrical Tape with Applicator Brush Cap Black4 OZ. (084104B)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•WATERPROOF PROTECTION - Creates an airtight, protective, waterproof, UV-resistant, dielectric seal on wires & cables, ensuring safety in marine, automotive, and household applications
•SAFE & RELIABLE - Patented, fast-drying formula; STAR BRITE's quality ensures a safe and dependable solution for all your electrical sealing needs
•EASY APPLICATION - Comes with an integrated applicator brush cap for smooth and precise application, making your tasks hassle-free
•DURABLE & FLEXIBLE - Offers a strong bond that prevents corrosion on wires and terminals, protects against vibration, weather, and wear, providing long-lasting performance
•CHOOSE YOUR COLOR - Multiple color choices blend seamlessly with most wires and cables, maintaining a professional and clean appearance - remains flexible after drying
•DYI FRIENDLY & VERSATILE - Perfect for sealing joints, splices, frayed cables and connections in any environment, from boats to cars to laptops, phone charging cables or holiday light displays
•PROUDLY AMERICAN, TRUSTED GLOBALLY - With STAR BRITE, you're choosing a leading name in marine, auto, RV, home, and outdoor products since 1973, all proudly made in the USA for superior quality and performance
•ADHERES TO VARIOUS SURFACES - Superior to electrical tape, sticks to metal, plastic, vinyl, rubber, and composite surfaces; stops terminal screws from loosening due to vibration; safe, easy to use, and fast drying
•VERSATILE APPLICATIONS - 100's of uses including bilge pumps, outdoor wiring, sprinkler pumps, timers, underground wiring, lighting fixtures, instruments; anywhere a weatherproof connection is needed
•STAR BRITE ADVANTAGES - Totally waterproofs connections; multicolors for wire coding; absorbs vibrations; UV resistant; flexible; applies to irregular shapes; service range -50°F to +275°F; super dielectric strength

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$7.63

$15.99

-52%

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Liquid Rubber

Liquid Rubber RV Roof Sealant- Professional-Grade Solar Reflective Flexible Waterproof Membrane Coating for EPDM, TPO, Fiberglass & Aluminum Camper & Travel Trailers- Brilliant White, 1 Gallon

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•FLEXIBLE WATERPROOF MEMBRANE: Our professional-grade RV roof sealant creates a flexible seal, preventing leaks and water damage while maintaining flexibility in all temperatures - perfect for travel trailers, campers, pop up campers, rv’s, and for keeping your trailer’s interior dry all year long
•COMPLETE ROOF PROTECTION SYSTEM: This elastomeric roof coating with heat reflective properties surpasses basic rubber roof repair kits by providing unmatched solar reflective performance that reduces heat absorption, lowering interior temperatures, saving costs on your heating bills and extending your RV roof's lifespan
•VERSATILE MULT-SURFACE SYSTEM: Designed to work with EPDM, TPO, Fiberglass, and aluminum Roofs, skylights, RV vent covers, and camper awning components as part of a complete RV roof sealing system. This liquid rubber coating pairs with Liquid Rubber EPDM Primer for enhanced adhesion on EPDM and TPO surfaces., delivering durable, leak-proof coverage.
•WEEKEND PROJECT SOLUTION: Achieve professional RV roof repair results in just one weekend with our easy 3-step system (Liquid Rubber RV Smart Cleaner, Liquid Rubber EPDM & TPO Primer, Liquid Rubber RV Roof Coating) - no special tools required! Simply apply with brush, roller or sprayer between 50°F-90°F(10°C-32.2°C) for a brilliant white, durable roof sealant waterproof membrane
•MAXIMUM COVERAGE & PERFORMANCE: Rolls on like paint - Apply 1 gallon for every 50 sq ft to achieve your final recommended thickness. 1 - 5G pail will cover a 30 foot RV; be sure to use up all material - For complete protection, use with Liquid Rubber Lap Sealant, and Liquid Rubber Seam Tape on joints, vents, skylights and transitions where movement may occur, creating a watertight system compatible with all camper roofs
•WATER BASED FORMULA: Our, zero VOC, water-based technology safely seals RV roofs without harmful solvents - store sealed containers above freezing for future touch-ups. Perfect for RV roof repair, camper roof maintenance, and motorhome waterproofing, ensuring weather-resistant performance
•TRUSTED DURABILITY: We stand behind our RV roof sealant with 10 years of protection, ensuring long-lasting performance when applied as directed

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$79.95

$89.95

-11%

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J-B Weld

J-B Weld 31319 Black RTV Silicone Sealant and Adhesive - 3 oz.

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•RTV Silicone sealant & adhesive : Is a general purpose RTV (Room Temperature Vulcanized) Silicone, designed for sealing and bonding uneven surfaces.

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$6.99

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Liquid Rubber

Liquid Rubber Waterproof Sealant – DIY Leak Repair Coating for Flat, Metal & Low Slope Roofs, Foundations, Gutters & More – Flexible Protective Membrane - Black - 1 Gallon

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•INDUSTRIAL STRENGTH BITUMEN FORMULA - Create a seamless waterproof membrane on flat roofs, metal roofs, low slope roofs, foundations, gutters, concrete surfaces, planter boxes, and more. Our premium liquid rubber forms a durable barrier against water infiltration where other sealants fail. Superior alternative to traditional roof tar or patch products
•SUPERIOR FLEXIBILITY & DURABILITY - With over 950% elongation, this waterproof sealant maintains adhesion even with building movement and temperature changes. Our sealant is designed to resist cracking, peeling, and UV damage. Creates a flexible rubberized coating that delivers long-lasting protection
•PROFESSIONAL COVERAGE SPECIFICATIONS - Brush, roll or spray on - For flat/low slope roofs & standing water surfaces: 1 gallon covers 15 sq ft (3-4 heavy coats to achieve 60-80 mil membrane). For vertical surfaces like foundations: 1 gallon covers 30 sq ft (2-3 heavy coats for 30 mil membrane). Ideal for both roof repair and preventative maintenance applications
•WATER-BASED ADVANCED FORMULA - Unlike harsh roof tar or solvent-based products, our water-based formula contains no VOCs or harmful odors, making it perfect for indoor and outdoor use. Doesn't damage foam insulation or sensitive materials. Perfect for waterproofing projects in confined spaces
•ENGINEERED WATERPROOFING SYSTEM - For maximum protection, use with Liquid Rubber Seam Tape or Geo-Textile to bridge joints, seams, vents, skylights, and protrusions where movement may occur. Creates a comprehensive waterproofing system for long-lasting leak repair and prevention on your roof, basement, or foundation
•USED BY PROFESSIONALS & DIYers ALIKE - With millions of gallons sold, Liquid Rubber is the go-to choice for contractors, property managers, and homeowners tackling projects from roof leak fixes to basement waterproofing. Our high-performance formula delivers professional results whether you're an experienced pro or a first-time DIYer
•PREMIUM ADHESION TECHNOLOGY - Superior adhesion to most building materials including metal, concrete, wood, and more. This hardware sealer can remain tacky after curing - NOT suitable for walking surfaces such as walkways, patios or decks. Use for waterproofing applications where foot traffic where foot traffic is minimal or not needed

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$69.95

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Flex Seal Liquid

Flex Seal Liquid, Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, Basements, RV, Campers, Trailers, Marine, EPDM, Masonry, Clear, 16 oz

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Flex Seal Liquid is liquid rubber in a can! Now you can brush, roll, dip or pour it on!
•Use anywhere you need a watertight, flexible rubberized coating
•Goes on smooth and covers fast, sealing out water, air and moisture
•UV Resistant
•Prevents rust and corrosion. Chemical resistant

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$21.79

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Liquid Rubber

Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black, 5 Gallon

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

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

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$159.95

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WANJAO

WANJAO Tool Dip Rubber Coating, Liquid Rubber Dip Flexible Peelable Protective Coating Rubber Coating Sealant, Waterproof, Flexible, Breathable, Slip Resistance for Tools DIY Craft, 150g Black

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Peelable Rubber Coating: Forms a flexible, removable layer that protects surfaces from scratches, and abrasion without permanent adhesion.
•Provides enhanced grip: The rubberized coating improves grip and handling on objects, ensures a firm grip,reducing the risk of slipping or dropping.
•Easy to Apply & Removal: Plastic dip smear on clean surfaces, peel off when needed; No scraping or solvents needed it comes off cleanly without damage.
•Multi-Purpose Use: Rubber coating suit for tool grips, electronic cables, car interiors, DIY projects surfaces.
•Reusable Protection: Recoat as needed for ongoing project protection.

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$13.99

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Tapel

Tapel Liquid Rubber Waterproof Sealant - 3X Stronger - Black 35oz - Professional Grade Roof & Concrete Coating, Indoor/Outdoor Leak Repair, Crack Filler, Weather-Resistant Protection

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

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. 10-year waterproof guarantee.
•✔ ✅ ECO-SAFE & HIGH-YIELD COVERAGE: Low-VOC water-based formula safe for fish ponds and greenhouse use. 35oz covers 21 sq ft (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.

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$23.99

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