Water sealant is a substance used to fill in cracks or holes in order to prevent water from leaking through. There are many different kinds of water sealant available on the market, and the best kind to use will depend on the specific leak that needs to be fixed.
For example, if a leak is small and only occurs when it rains, then a silicone-based sealant would likely be the best option. On the other hand, if a leak is larger and occurs even when there is no rain, then an epoxy-based sealant would be a better choice.
20 Best Sealant For Water Leaks
Product Image | Product Name | Features | Price |
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Fix A Leak Pool Leak Sealer – 32 oz |
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Rust-Oleum Leak Seal Flexible Rubber Coating, Aluminum – 12 oz can |
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K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug |
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Flex Seal Sealant Coating, Black, Liquid Rubber – 16 fl oz |
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Flex Seal Brite Liquid Rubber Sealant Coating, White – 14 oz can |
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Underwater Magic Leakage Preventor, White, Size: One Size 6530-11 |
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Gorilla Waterproof Patch & Seal Spray, Black, 16 Ounces, 2 Pack |
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Marlig Fixaleak32 Fix-A-Leak Pool or Spa 32 oz Liquid Sealant |
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Flex Seal Aerosol Spray, Clear – 14 oz bottle |
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Rust-Oleum 265494 Spray Black Leak Sealer – 12 oz can |
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Flex Seal Liquid Rubber Sealant Coating, Black – 14 oz can |
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Fernox 61016 50ml LS-X External Leak Sealer |
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Flex Seal Liquid Rubber Sealant Coating, Clear, Minis – 2 oz |
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Permatex 82099 Spray Sealant, 9 oz Aerosol Can, Liquid, Solvent |
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Leisure Time Leak Seal (1 qt) |
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- Finds and fixes leaks fast
- Permanently seals leaks and holes up to 1/8 inch in diameter in most any material including plumbing
- Seals leaks and cracks water-tight
- Paintable finish
- Great for gutters, roofs, flashing, ductwork, PVC
- Item Weight 544 g
- Product Dimensions 15 x 10.4 x 4.8 cm
- Item Weight 544 gm
- Creates a Watertight Flexible Rubberized Coating
- Blocks Out Air Water and Moisture
- Prevents Rust and Corrosion
- Item Weight: 1.4 lb
- Country of Origin: United States
- Color: White
- Use underwater and in wet areas
- Pools and Spas
- Repair or replace tiles
- Brand: Marlig
- Fix A Leak 32Oz Bottle
- Package Dimensions: 8.0 x 8.0 x 8.0 inches
- Protective clothing recommended
- Shake well and spray using an even sweeping motion
- Apply several even coats until all cracks and holes have been filled
- Seals leaks and cracks water-tight
- Paintable finish
- Great for gutters, roofs, flashing, ductwork, PVC, masonry, concrete and more
- Weatherize your home
- Foundation and concrete waterproofing
- Indoor and outdoor projects
- Ideal for use on compression joints and screwed fittings
- Never sets rock hard, joints can easily be undone
- Ready -to- use, no mixing
- It’s an easy-to-use, portable, aerosol spray
- Sprays out as a liquid and dries as a strong, rubberized coating
- Stays flexible and pliable
- Seals and protects
- Saves time and labor
- Stops low-pressure leaks without disassembly
- Specially formulated for spas and hot tubs.
- Convenient and easy-to-use formula repairs most spa hot tub surfaces.
- Helps maintain your spa’s surface and plumbing for years of enjoyment.
1. Fix A Leak Pool Leak Sealer – 32 oz
- Finds and fixes leaks fast
- Permanently seals leaks and holes up to 1/8 inch in diameter in most any material including plumbing
- Spa Dosage: 8 oz
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Amazon.com – Seller | |
eBay | |
Walmart | |
PoolSupplies.com |
Product Details
Specifications
Details | |
Size | Size: 32 oz |
Reviews From Real Customers
2. Rust-Oleum Leak Seal Flexible Rubber Coating, Aluminum – 12 oz can
- Seals leaks and cracks water-tight
- Paintable finish
- Great for gutters, roofs, flashing, ductwork, PVC
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Amazon.com | |
eBay | |
Walmart | |
Valu Home Centers |
Product Details
Specifications
Details | |
Color | Aluminum |
Product Type | Leakseal Flexible Rubber Sealant |
Durability | 1 Year |
Fiber Reinforced | No |
Cold Application | Yes |
Reviews From Real Customers
3. K Seal Heavy Duty Permanent Coolant Leak Sealer – 16 oz jug
- Item Weight 544 g
- Product Dimensions 15 x 10.4 x 4.8 cm
- Item Weight 544 gm
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Amazon.com | |
eBay | |
Walmart | |
JBTools.com |
Product Details
Specifications
Details | |
Product Dimensions | 5.9 x 4.1 x 1.9 inches |
Country of Origin | USA |
Is Discontinued By Manufacturer | No |
Reviews From Real Customers
4. Flex Seal Sealant Coating, Black, Liquid Rubber – 16 fl oz
- Creates a Watertight Flexible Rubberized Coating
- Blocks Out Air Water and Moisture
- Prevents Rust and Corrosion
- Mildew and Chemical Resistant
- Non-Hazardous Non-Flammable
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Amazon.com | |
Flex Seal Official Store | |
Rural King | |
Farm & Home Hardware |
Product Details
Specifications
Details | |
Units in Package | 1 |
Unit Size | 16 fl oz |
Directions | Surface must be clean, dry and free of grease, oil and dirt. Increase adhesion by etching surface with sandpaper. Brush, roll, dip or pour directly onto surface. Coat entire surface until all cracks and holes are completely filled. Apply additional coats as needed. Allow each coat to dry completely before adding additional coats. Allow 24 to 48 hours or more to dry. Covers up to 18.75 Square Feet. All cracks and holes must be completely filled and dry before testing product. Clean Up: Wet Flex Seal Liquid can be easily cleaned with a dry cloth or paper towel. Brushes and rollers can be cleaned with mineral spirits. Not intended for professional roofers. Protective clothing is recommended. Stir can well, do not shake. |
Warnings | Caution: Combustible liquid harmful if swallowed. Eye Contact: If product enters the eyes, open eyes while under gentle running water for at least 15 minutes. Seek medical attention if irritation persists. Skin contact: Wash skin thoroughly after handling. Seek medical attention if irritation develops and persists. Remove contaminated clothing. Launder contaminated clothing before re-use. Inhalation: If breathing becomes difficult, remove victim to fresh air. Seek medical attention if breathing difficulty continues. Ingestion: If product is swallowed do not induce vomiting. Call poison control or seek medical attention. Keep out of the reach of children. |
5. Flex Seal Brite Liquid Rubber Sealant Coating, White – 14 oz can
- Item Weight: 1.4 lb
- Country of Origin: United States
- Color: White
- Brand name: Flex Seal
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Amazon.com – Seller | |
Flex Seal Official Store | |
Dollar General | |
Acme Tools |
Product Details
Specifications
Details | |
Units in Package | 1 |
Unit Size | 14 oz |
Directions | So easy to use! Protective clothing recommended. Use in a well ventilated area. Shake well for one minute. Spray using an even sweeping motion. Spray a larger area than where the leak occurred and feather edges. Allow Flex Seal to dry completely before applying your next coat. Apply several even coats instead of one thick coat. Works best at can temperatures above 60 degrees F. Occasionally shake can throughout application. Note: After each use, invert can and apply a short burst to clear nozzle. |
Warnings | Danger: Extremely flammable. Harmful or fatal if swallowed. Vapor Harmful. May cause eye, skin, and respiratory tract irritation. Contents under pressure. Danger: Contains Toluene (108-88-3), Odorless Mineral Spirits (64742-48-9), Aliphatic Petroleum Solvent (64742-89-8), Titanium Dioxide (13463-67-7) and Liquefied Petroleum Gas (68476-86-8). Use only in a well ventilated area. Intentional misuse by concentrating and inhaling the product can be harmful or fatal. Do not use near heat, sparks or open flame. Avoid contact with eyes or prolonged contact with skin. Do not puncture or incinerate container. Do not expose to heat or store at temperatures above 120 degrees F. Warning this product contains a chemical known to the state of California to cause cancer and birth defects or other reproductive harm. First Aid: If Eye Contact: flush with large amounts of cool running water for at least 15 minutes while holding upper and lower lids open. Remove contact lenses, if present and easy to do. If irritation persists get medical attention immediately. If Skin Contact: wash with soap and water. If irritation persists get medical attention immediately. Excessive Inhalation: Remove to fresh air. Seek medical attention immediately. If breathing stops give artificial respiration. If Ingested: Do not induce vomiting. Seek medical attention immediately. |
Reviews From Real Customers
6. Underwater Magic Leakage Preventor, White, Size: One Size 6530-11
- Use underwater and in wet areas
- Pools and Spas
- Repair or replace tiles
- Repair fish tanks, ponds and fountains
- 100% Silicone Free
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Amazon.com – Seller | |
Wild West Pool Supplies |
Product Details
Specifications
Details | |
Product Dimensions | 8.5 x 2 x 2.5 inches |
Is Discontinued By Manufacturer | No |
Reviews From Real Customers
7. Gorilla Waterproof Patch & Seal Spray, Black, 16 Ounces, 2 Pack
- 16 Ounces
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Amazon.com | |
Walmart – Flaritys |
Product Details
Specifications
Details | |
Size | 2 Pack |
Reviews From Real Customers
8. Marlig Fixaleak32 Fix-A-Leak Pool or Spa 32 oz Liquid Sealant
- Brand: Marlig
- Fix A Leak 32Oz Bottle
- Package Dimensions: 8.0 x 8.0 x 8.0 inches
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Amazon.com | |
eBay – widestep | |
Walmart | |
ShopChimney.com |
Product Details
Specifications
Details | |
Recommended Use | Swimming Pool |
Assembled Product Dimensions (L x W x H) | 1.00 x 1.00 x 1.00 Inches |
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9. Marlig Fix A Leak 32oz Pool and Spa Leak Stop
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Amazon | |
eBay | |
Walmart | |
Leslie’s Pool Supplies |
Product Details
Specifications
Details | |
Alternate Model Numbers | FAL-32 FAL32 |
Ship Weight (lbs) | 3.1 |
Reviews From Real Customers
10. Flex Seal Aerosol Spray, Clear – 14 oz bottle
- Protective clothing recommended
- Shake well and spray using an even sweeping motion
- Apply several even coats until all cracks and holes have been filled
- Allow to dry completely before applying the next coat. Fully cures in 24 hours
- Spray a larger area than where the leak occurred and feather edges
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Amazon | |
Home Depot | |
Lowe’s | |
Flex Seal Official Store |
Product Details
Specifications
Details | |
Product Type | Sealer |
Container Type | Spray can |
State | Liquid |
Recommended Use | Porcelain, glass, rubber, tile, plastic, metal, vinyl, fabric, aluminum, concrete surfaces, wood, cement, roof, masonry, drywall |
Features | Corrosion protection |
11. Rust-Oleum 265494 Spray Black Leak Sealer – 12 oz can
- Seals leaks and cracks water-tight
- Paintable finish
- Great for gutters, roofs, flashing, ductwork, PVC, masonry, concrete and more
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Amazon | |
Home Depot | |
McGuckin Hardware | |
Hellers Hardware |
Product Details
Specifications
Details | |
Manufacturer Part Number | 265494 |
Product Name | Flexible Rubber Coating Spray |
Packaged Quantity | 1 |
Product Type | Sealing Spray |
Product Color | Black |
Reviews From Real Customers
12. Flex Seal Liquid Rubber Sealant Coating, Black – 14 oz can
- Weatherize your home
- Foundation and concrete waterproofing
- Indoor and outdoor projects
- Seal cracks and holes
- Pools and pool equipment
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Sold By | Price |
Amazon | |
Home Depot | |
Lowe’s | |
Flex Seal Official Store |
Product Details
Specifications
Details | |
Product Type | Sealer |
Container Type | Spray can |
State | Liquid |
Recommended Use | Porcelain, glass, rubber, tile, plastic, metal, vinyl, fabric, aluminum, concrete surfaces, wood, cement, roof, masonry, drywall |
Features | Corrosion protection |
13. Rust-Oleum 265494 350ml Leak Seal Flexible Rubber Sealant, Black
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Amazon | |
eBay | |
Diamond Tool Store | |
Do it Best |
Product Details
14. 13.75 oz. LeakSeal Clear Bonus Spray
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Amazon | |
MechanicSurplus.com |
Product Details
15. Flex Seal Black Liquid Rubber Sealant Coating
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Amazon | |
eBay | |
Walmart | |
Lowe’s |
Product Details
Specifications
Details | |
Assembled Product Weight | 2 lbs |
Assembled Product Dimensions (L x W x H) | 4.25 x 4.25 x 4.75 Inches |
16. Fernox 61016 50ml LS-X External Leak Sealer
- Ideal for use on compression joints and screwed fittings
- Never sets rock hard, joints can easily be undone
- Ready -to- use, no mixing
- WRAS approved product
- completely safe to use with drinking water Fernox 61016 50ml LS-X External Leak Sealer
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Amazon | |
Bonanza – roxy media’s booth |
Product Details
Specifications
Details | |
Product Genre/Category | Home & Garden |
Reviews From Real Customers
17. Flex Seal Liquid Rubber Sealant Coating, Clear, Minis – 2 oz
- It’s an easy-to-use, portable, aerosol spray
- Sprays out as a liquid and dries as a strong, rubberized coating
- Stays flexible and pliable
- Lightweight, portable and so easy to use
- Available in three (3) colors
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Amazon | |
Walmart | |
Home Depot | |
Flex Seal Official Store |
Product Details
Specifications
Details | |
Units in Package | 1 |
Unit Size | 2 oz |
Directions | So easy to use! Read entire can. Wear face and eye protection, protective gloves and clothing; Make sure the area is clean, dry and free of grease, oil & dirt; Shake well: Spray 8 inches to 12 inches from surface; Apply several coats until all cracks and holes have been filled. Allow 24 to 48 hours to fully cure. Not recommended for extreme heat or gasoline related applications. Do not use on high pressure areas or tires. Works best at can temperatures above 60 degrees F. Note: After each use, invert can and apply a short burst to clear nozzle. Not intended for use by professional roofers. This product has not been tested for use in potable water systems. May not be compatible with all plastics, vinyls & rubbers. |
Warnings | This product can expose you to chemicals including ethyl benzene, which is known to the state of California to cause cancer, and toluene, which is known to the state of California to cause birth defects or other reproductive harm. For more info go to www.P65Warnings.ca.gov. Danger: Extremely flammable. Harmful or fatal if swallowed. Vapor harmful. May cause eye, skim, and respiratory tract irritation. Contents under pressure. See other cautions on back panel. Danger: Contains (CAS No): Toluene (108-88-3), Acetone (67-64-1), parachlorobenzotrifluoride (98-56-6), solvent naptha (petroleum), light aromoatic (64742-89-8) and liquefied petroleum gas (68476-86-8). Use only in a well ventilated area. When using inside, prevent vapor buildup by opening doors and windows. Ensure fresh air entry during application and drying. Do not use near heat, sparks, pilot lights or other sources of ignition. Do not smoke. When covering large areas indoors eliminate ignition sources far from the point of use because vapors are heavier than air and significant distances. Intentional misuse by concentrating and inhaling the product can be harmful or fatal. Avoid contact with eyes or prolonged contact with skin. Do not puncture or incinerate container. Do not expose to heat or store at temperatures above 120 degrees F. First Aid: If Eye Contact: Flash with large amounts of cool running water for at least 15 minutes while holding upper and lower lids open. Remove contact lenses, if present and easy to do. If irritation persists get medical attention immediately. If Skin Contact: Wash with soap and water. If irritation persists seek medical attention. Excessive Inhalation: Remove to fresh air. Seek medical attention immediately. If breathing stops give artificial respiration. If Ingested: Do not induce vomiting. Seek medical attention immediately. Keep out of reach of children. |
Reviews From Real Customers
18. Permatex 82099 Spray Sealant, 9 oz Aerosol Can, Liquid, Solvent
- Seals and protects
- Saves time and labor
- Stops low-pressure leaks without disassembly
- Eliminates the need for liquid-additive sealers that can swell internal seals
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eBay | |
Walmart | |
Advance Auto Parts | |
Valu Home Centers |
Product Details
Specifications
Details | |
Units in Package | 1 |
Unit Size | 9 oz aerosol can |
Reviews From Real Customers
19. Permatex 9 oz. Aerosol Spray Leak Sealer 82099 82099 575704
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Walmart – ADVENTURERS BAG |
Product Details
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20. Leisure Time Leak Seal (1 qt)
- Specially formulated for spas and hot tubs.
- Convenient and easy-to-use formula repairs most spa hot tub surfaces.
- Helps maintain your spa’s surface and plumbing for years of enjoyment.
Check Latest Price
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Aqua Supercenter | |
Wild West Pool Supplies | |
POOLplaza | |
Your Pool HQ |
Product Details
Specifications
Details | |
Weight | 50.41 lb |
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Conclusion
After years of research, scientists have finally developed a sealant that can effectively stop water leaks. This sealant is made from a special polymer that is able to bond with water molecules and create a water-tight seal.
This sealant can be used to fix leaks in pipes, plumbing fixtures, and even swimming pools.