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10 bestRadiator Sealantof February 2025

112M consumers helped this year.

1

Permatex 59203 Black RTV Silicone Adhesive Sealant 16BR, 80ml
Permatex 59203 Black RTV Silicone Adhesive Sealant 16BR, 80ml

Permatex

9.9

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12% off

2

Sikaflex-221, White, Multi-Purpose Industrial Grade Polyurethane Sealant & Adhesive, Weather Resistant Sealant. Ideal for Caravans & Motorhomes 300 mL (10.1 US fl. oz)
Sikaflex-221, White, Multi-Purpose Industrial Grade Polyurethane Sealant & Adhesive, Weather Resistant Sealant. Ideal for Caravans & Motorhomes 300 mL (10.1 US fl. oz)

SIKA

9.8

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3

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

Permatex

9.7

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4

Liquid Rubber RV Lap Sealant, White, 2 Pack
Liquid Rubber RV Lap Sealant, White, 2 Pack

Liquid Rubber

9.5

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5

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

K-Seal

9.2

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Related productsUp to 10% off

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

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

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

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

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Bar's Leaks 1196 Grey Radiator Stop Leak - 11 oz.

Bar's Leaks 1196 Grey Radiator Stop Leak - 11 oz.

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J-B Weld High Heat Epoxy Syringe, Dark Grey

J-B Weld High Heat Epoxy Syringe, Dark Grey

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6

POR-15 Fuel Tank Sealer - 16 oz Gray - Stops Rust, Corrosion, & Leaks | Seals Pinholes & Seams | Non-Porous, Flexible Film | Resistant to All Fuels, Alcohols, & Additives
POR-15 Fuel Tank Sealer - 16 oz Gray - Stops Rust, Corrosion, & Leaks | Seals Pinholes & Seams | Non-Porous, Flexible Film | Resistant to All Fuels, Alcohols, & Additives

POR-15

9.0

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30% off

7

Permatex 59234 High Temperature 592 Thread Sealant, 50mL
Permatex 59234 High Temperature 592 Thread Sealant, 50mL

Permatex

8.7

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13% off

8

SIKA - High-performance elastomeric sealant for joints - Sikaflex 1A - White - for small joints and fillets - Multi-purpose - Single Component - 300 mL
SIKA - High-performance elastomeric sealant for joints - Sikaflex 1A - White - for small joints and fillets - Multi-purpose - Single Component - 300 mL

SIKA

8.5

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9

J-B Weld 31914 Red High Temperature RTV Silicone Gasket Maker and Sealant - 10.3 oz.
J-B Weld 31914 Red High Temperature RTV Silicone Gasket Maker and Sealant - 10.3 oz.

JB Weld

8.2

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10

Bar's Leaks HDC Radiator Stop Leak Tablet - 60 Grams
Bar's Leaks HDC Radiator Stop Leak Tablet - 60 Grams

Bar's Leaks

7.9

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