Top 10 Best foundation leak repair in 2026

Last Updated - 6/23/2026

🏆Best Choice

DAP

DAP Concrete and Mortar Filler and Sealant, Gray, 10.1 Oz (7079818096)

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Concrete patch filler seals cracks and holes in exterior or interior concrete and masonry surfaces
•Concrete sealer is ready to use – needs no mixing or additives making projects easy
•Flexible adhesive is low in odor, cleans up easy with water and provides a 24 hour return to service time
•Provides a durable, long-lasting concrete crack repair that resists gasoline, salt, grease or oil when cured
•Versatile concrete patch and repair may be painted with latex or oil-based paints
•Contains no flammable or toxic solvents
•Provides a weather-tight seal that stays flexible, prevents ice and water damage and resists cracking
•Clean up before curing can be accomplished with soap and water
•10.3-Ounce

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$6.65

$7.48

-11%

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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

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

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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MAV AquaDoc

Hot Tub Leak Sealer to Fix Leaks Easily - Spa Leak Sealer 16oz, Advanced Spa Repair Chemical Made in the USA - AquaDoc

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Can't Find a Leak in your Spa or Hot tub? AquaDoc's advanced spa fix a leak sealer helps find and stop leaks - even if you can't find the water leak on your own. Seal a leak for hot tub or spas fast with our hot tub leak sealer.
•Stop leaks within 24 Hours - With our Hot Tub Leak sealant, you can fix a leak for hottubs and spas quickly. Our spa leak sealer & hot tub leak seal works fast to seal minor hot tub leaks. Making a spa leak stop has never been faster.
•Hot Tub Crack Repair Kit - Repair spa leaks without having to drain your water. If you own a hot tub stop leak sealing by draining water first. With our hot tub stop leak formula, you can seal water leaks while the tub is full.
•The only Fix a Leak Seal Kit you Need - With AquaDoc's hot tub sealant, there's no need for spa sealant tools or extra hot tub sealing kits. Our hot tub liquid sealant formula works alone to help seal minor cracks and leaks in your spa or hot tub.

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$24.99

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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, 1 Gallon

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

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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$59.95

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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

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

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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Tufinein

Rubber Liquid Waterproof Sealant, TUFINEIN 53oz/1.5kg Neutral Gray Quick Drying Multi Surface Foundation Leak Repair - Roof Gutters Basement Sealer Waterproof - Indoor & Outdoor Flexible Rubber Paint

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•ELASTICITY & EXTENSIBILITY: Waterproof coating sealant can smoothly cover small gaps and cracks, effectively resisting deformation of the substrate. Rubber sealant Initial film formation occurs in 2-4 hours, forming a flexible rubber coating that provides lasting waterproof protection
•LONG-LASTING WEATHER RESISTANCE: Professional rubber sealant waterproof membrane remains stable in high and low temperatures (-40 °C to 80 °C/-40 °F to 176 °F). Waterproof coating has good adhesion on multiple surfaces, not easy to crack and effectively resists aging
•ROOF SEALANT WATERPROOF LEAK REPAIR: Waterproof sealant is suitable for metal roofs, sheds, concrete basements, walls, gutters, wooden skylights, flower pots, low-pressure small swimming pools, bird baths, and fountains. Not suitable for walking surfaces when cured
•COVERAGE AREA AND PERFORMANCE: Concrete foundation vertical surfaces: 0.6 mm thickness covers 2 m² (21.4 ft²), flat/low-slope roofs and standing water surfaces: 1 mm thickness covers 1 m² (10.7 ft²), use polyester fabric at joints and obvious cracks to enhance waterproofing performance
•FLEXIBLE WATERPROOF SEALANT: Foundation sealant waterproof has self-leveling properties and can be applied with a brush, roller, scraper, or poured. It cures quickly to form a dense rubber waterproof membrane, effectively sealing water, gases, and moisture indoors and outdoors to prevent leaks

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$35.99

$37.99

-5%

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RadonSeal

RadonSeal Complete DIY Foundation Crack Repair Kit, 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Drill-Free Injection: Repair basement wall cracks effortlessly without drilling, ensuring minimal disruption to your home's structure.
•Simple Application: Use a standard caulking gun to inject the low-viscosity, 2-component urethane, making the process accessible for any homeowner.
•Effective Hairline Crack Repair: Seal even the smallest cracks permanently with the specialized urethane, preventing further water seepage and damage.
•Interior Repair Advantage: Save on costly excavation by repairing cracks from inside your basement, maintaining exterior aesthetics and structural integrity.
•Comprehensive Protection: This solution not only protects against water but also acts as a barrier against radon and soil gases, safeguarding your basement environment.

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$154.00

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Vividye

Waterproof Sealant 70oz, Transparent Waterproof Coating for Roof, Floor, Window, Bathroom, Concrete,Wood, Invisible Water Proof Agent＆Foundation Leak Repair Adhesive for Indoor/Outdoor Use Water-Based

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Premium Transparent Formula: Our clear waterproof sealant is water-based and eco-friendly, forming an Transparent Waterproof Coating after curing. It stays crystal-clear, preserving surface aesthetics while blocking moisture, air and discoloration, extending surface lifespan. Ideal for waterproof projects.
•Versatile Waterproof Sealant Applications: Use this invisible waterproof agent for indoors ＆ outdoors on roofs, floor, bathroom, walls, basements, gutters, skylights, pipes, and window sills. Suitable for wood, concrete, metal, ceramics, brick sealant projects. Whether indoors or outdoors, it handles leaks and cracks effortlessly.
•High-Performance Leak Repair: The liquid waterproof adhesive penetrates cracks and gaps, creating a clear seal resistant to heat, cold, and UV. It ensures long-lasting waterproofing, protecting surfaces from leaks while maintaining flexibility — perfect for slab leak repair and foundation sealant needs.
•Easy Coverage & Application: Mix well and apply by brush, roller, or pour. Our Invisible Waterproof kit includes a brush for smooth, even application and gloves for safe handling — ready to use right out of the box! For a 1 thin coat, 1 kg covers approximately 80 sq ft. For optimal waterproofing with 2 coats (at least 2 coats), coverage is approximately 40 sq ft. This effortless gap-filling liquid waterproof sealant delivers quick, reliable repairs.
•Practical Guidelines for Best Results: For best results, apply under ventilated conditions with an ideal temperature range of 5°C to 35°C (41°F to 95°F). Always test on small areas first. Once fully cured (12-24h), it withstands water immersion — making it ideal for bathrooms and other high-moisture areas. This clear waterproof sealant delivers reliable, long-term protection. For any questions, contact us anytime.

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$28.99

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Applied Technologies

Applied Technologies 6-10' Fast Set Concrete Foundation Crack Repair Kit - Hydra Stop 300 Polyurethane Foam for Wall Cracks, Prevents Basement Flooding, Quick-Setting Waterproof Sealing Solution

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•COMPLETE CONCRETE CRACK REPAIR KIT: Fix foundation wall cracks and stop water leaks with the Applied Technologies 10' Fast Set Concrete Crack Repair Kit. Includes Hydra Stop 300 Polyurethane Foam that expands to fill cracks, preventing basement flooding and water damage.
•EFFECTIVE DIY SOLUTION: Designed for DIY homeowners, this quick-setting waterproof sealant solution is easy to apply. It provides an efficient way to repair cracked walls, making it a strong option for tackling wet foundations without professional help.
•WATERPROOF SEALING SOLUTION: The Hydra Stop 300 Polyurethane Foam creates a durable, waterproof barrier that prevents moisture from seeping through foundation cracks. Once set, it forms a permanent seal for lasting protection.
•KIT INCLUDES EVERYTHING YOU NEED: Each kit includes two cartridges of Hydra Stop 300 Polyurethane Foam, Poxy Paste crack sealant, surface ports, a caulk gun, and detailed instructions with an online video tutorial. The simple process ensures fast, efficient, and lasting repairs.
•MADE WITH QUALITY CRAFTSMANSHIP: Applied Technologies has been providing effective waterproofing solutions since 1998. Our products are crafted to meet high industry standards, ensuring performance and durability for every DIY project.

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$158.90

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LCR

Polygem LCR Epoxy Concrete Crack Repair Kit - Stops Leaks - High-Performance Structural Bonding - Professional Grade - Reliable & Effective - DIY Friendly - Versatile - Wood, Fiberglass, Metal & More

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•High-Performance Concrete Crack Repair: Effectively seal and repair cracks in concrete structures with our professional-grade Polygem LCR Epoxy Kit.
•Stops Leaks Permanently: Achieve reliable and long-lasting results by addressing concrete cracks and preventing further water penetration and damage.
•Structural Bonding: Our advanced epoxy formula ensures strong and durable bonding, restoring the integrity and strength of the repaired area.
•Versatile Solution: Not just for concrete, this kit can also be used on wood, fiberglass, metal, and more, making it a versatile choice for various applications.
•Professional Grade: Trusted by contractors and DIY enthusiasts alike, our LCR Epoxy Kit delivers professional-grade performance for lasting repairs.
•Easy to Use: Simplify the repair process with our user-friendly kit, designed for easy application and suitable for both beginners and experienced users.
•Comprehensive Solution: This kit includes all the necessary components, including injection ports, to provide a comprehensive solution for crack repair.
•Reliable and Effective: Our epoxy kit offers reliable and effective results, ensuring a strong and durable repair that you can trust.
•Durable and Long-Lasting: Enjoy the peace of mind that comes with a repair that stands the test of time, offering lasting durability and performance.
•Professional Results at Home: With our Polygem LCR Epoxy Kit, achieve professional-quality results in the comfort of your own home, saving time and money on costly repairs.

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$137.22

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