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10 bestAntifreeze Leak Sealantof February 2025

112M consumers helped this year.

1

Ziollo RV Flex Repair Caulking Lap Sealant - Self Leveling EPDM Sealant for Rubber Roofs on Motorhomes, Trailers, Campers (White, 4-10 oz Tubes of RV Caulk)
Ziollo RV Flex Repair Caulking Lap Sealant - Self Leveling EPDM Sealant for Rubber Roofs on Motorhomes, Trailers, Campers (White, 4-10 oz Tubes of RV Caulk)

Ziollo

9.7

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2

Flex Seal – Stop Leaks Fast! Rubberized Waterproof Coating Spray, Ideal for Roofs, Holes, Cracks, DIY Projects, Automotive Fixes, Indoor & Outdoor Repairs, and More – Clear, 14 oz. (397 g) – 2 Pack
Flex Seal – Stop Leaks Fast! Rubberized Waterproof Coating Spray, Ideal for Roofs, Holes, Cracks, DIY Projects, Automotive Fixes, Indoor & Outdoor Repairs, and More – Clear, 14 oz. (397 g) – 2 Pack

Flex Seal

9.4

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3

Permatex 59103 Clear RTV Silicone Adhesive Sealant 66BR, 80mL
Permatex 59103 Clear RTV Silicone Adhesive Sealant 66BR, 80mL

Permatex

9.2

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10% off

4

Ziollo RV Flex Repair 100% Silicone RV Roof Sealant - Premium Leak Repair & Waterproofing for Motorhomes, Trailers, and Campers - One Coat, No Priming Needed, 1 Gallon
Ziollo RV Flex Repair 100% Silicone RV Roof Sealant - Premium Leak Repair & Waterproofing for Motorhomes, Trailers, and Campers - One Coat, No Priming Needed, 1 Gallon

Ziollo

8.9

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5

Gorilla Waterproof Patch & Seal Spray, Flexible Rubberized Coating, Seals Out Water Air & Moisture, Stops & Prevents Leaks, Black, 16oz/453g, (Pack of 1), 104058
Gorilla Waterproof Patch & Seal Spray, Flexible Rubberized Coating, Seals Out Water Air & Moisture, Stops & Prevents Leaks, Black, 16oz/453g, (Pack of 1), 104058

Gorilla

8.6

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Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132

Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132

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Permatex VersaChem Muffler Weld Sealer, 170g 90334

Permatex VersaChem Muffler Weld Sealer, 170g 90334

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K-SEAL Coolant Leak Repair, ST9501 472ml Multi-Purpose Formula Stops Leaks in the Radiator, Head Gasket, Block, Water Pump Casing, Heater Core, Freeze Plug - Pour and Go - Designed for Canadian Market

K-SEAL Coolant Leak Repair, ST9501 472ml Multi-Purpose Formula Stops Leaks in the Radiator, Head Gasket, Block, Water Pump Casing, Heater Core, Freeze Plug - Pour and Go - Designed for Canadian Market

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LEAK SAVER Direct Inject UV Refrigerant Leak Sealer – Small System AC Refrigerant Leak Sealant for Most HVAC Systems - Automotive Leak Sealer – Up to 1 Tons Added UV Dye for Leak Detection (Small)

LEAK SAVER Direct Inject UV Refrigerant Leak Sealer – Small System AC Refrigerant Leak Sealant for Most HVAC Systems - Automotive Leak Sealer – Up to 1 Tons Added UV Dye for Leak Detection (Small)

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6

K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal ST5516 HD Multi Purpose One Step Permanent Coolant Leak Repair

K-Seal

8.3

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7

K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair

K-Seal

8.0

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8

VersaChem 90335 Exhaust Joint & Crack Sealer, 142g
VersaChem 90335 Exhaust Joint & Crack Sealer, 142g

Versachem

7.7

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9

LEAKSEAL Flexible Rubber Sealant in Clear, 405g
LEAKSEAL Flexible Rubber Sealant in Clear, 405g

Rust-Oleum

7.4

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10

Bar's Leaks Block Seal Head Gasket Sealant (Pack of 4),1100-4PK
Bar's Leaks Block Seal Head Gasket Sealant (Pack of 4),1100-4PK

Bar's Leaks

7.1

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