Top 10 Best Epoxy For Radiator Repair [2024]

No	Product	Score	Action
1	MASTERCOOL 90934 Alum Bond A/C Repair Epoxy - 2 oz	9.6	Buy On Amazon
2	J-B Weld 2120 Radiator and Plastic Repair Kit	9.4	Buy On Amazon
3	Permatex 09116 Fuel Tank and Radiator Repair Kit	9.4	Buy On Amazon
4	Northern Radiator Z12156 Radiator Repair Tool	9.4	Buy On Amazon
5	STAR BRITE Epoxy Aluminum Putty Stick - Make Fast	9.2	Buy On Amazon
6	Super Glue Pro Seal N62020 Instant Gas Tank and Radiator Repair	9	Buy On Amazon
7	J-B Weld 8271 KwikWeld Professional Size Steel Reinforced Epoxy Twin Pack - 10 oz	8.8	Buy On Amazon
8	J-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz	8.4	Buy On Amazon
9	Hy-Poxy H-450 Alumbond 6.5 oz Aluminum Putty Repair Kit	8.2	Buy On Amazon
10	J-B Weld 8297 HighHeat 500 Degree Epoxy Putty Stick - 2 oz	8.2	Buy On Amazon

Disclaimer: As An Amazon Associate I Earn From Qualifying Purchases.

RADIATORWELD: Our radiator and plastic tank repair kit has all you need for making professional quality, permanent repairs with state of the art components and easy to follow instructions.
COUNT ON US: For more than 40 years, our products have earned a loyal following from people who take pride in their work.
SIMPLE TO USE: No removal of tank or radiator is required to stop leaks.
VERSATILE & DEPENDABLE: Great for radiators, washer fluid tanks, storage tanks, water tanks, plastics, composites, PVC and more.
NO PROJECT TOO BIG OR TOO SMALL: We have all the products you need to get the job done right.

Works underwater! Every boater should have this onboard for emergency and permanant repairs
Easy to use – hand knead for 1 minute and apply to damaged area
Bonds in 5-10 minutes – Steel hard in 30 minutes Fully cured in 60 minutes and can then be sanded, drilled and tapped.
Special additives cut through oxidation and anodization to maximize bonding to weathered aluminum
Withstands high temperatures and pressures making it ideal for manifolds, mufflers, & drive units

J-B WELD KWIKWELD PRO SIZE: Professional 5 OZ Tubes of J-B Weld KwikWeld.
CURE AND SET TIME: After mixing the tubes at a 1: 1 ratio, it takes 6 minutes to set and 4-6 hours to cure.
VERSATILE AND DEPENDABLE: J-B Weld KwikWeld is steel reinforced, has a tensile strength of 3127 PSI and can withstand temperatures up to 230 degrees Fahrenheit (110 degrees Celsius).
SURFACE APPLICATIONS: Metal, Plastic & PVC, Wood, Concrete, Ceramic & Tile and Fiberglass
DO IT YOURSELF: Big or small, you can DIY it with J-B Weld.

J-B WELD WATERWELD: A hand mixable two part epoxy putty stick, that can cure under water and is ideal for repairing plumbing, fuel tanks, tubs and showers, drains, pool and spa, boats & potable water tanks and more! J-B Weld WaterWeld is certified by the NSF and is safe for contact with potable water.
CURE AND SET TIME: After kneading the two part formula together by hand, WaterWeld takes 25 minutes to set and cures in 1 hour.
PRODUCT FEATURES AND STRENGTH: J-B Weld WaterWeld has lap shear strength of 1300 PSI, can withstand continuous temperatures up to 300F (149C) and intermittent temperatures of 350F (176 degrees Celsius) and is chemical resistant against petroleum, hydraulic fluids and other chemicals when fully cured.
SURFACE APPLICATIONS: Iron & Stainless Steel, Copper & Brass, Aluminum & Bronze, Fiberglass and Plastic & PVC.
DO IT YOURSELF: Big or small, you can DIY it with J-B Weld.

Epoxy metal weld for aluminum
Repairs HVAC, radiators, engine blocks, boat hulls, equipment, appliances
Can be drilled, tapped, sanded, threaded and painted
Gives you a non rusting, non magnetic aluminum gray color, stays gray even after sanding/polishing
Made in the USA

J-B WELD HIGHHEAT: A hand mixable two part epoxy putty stick that is formulated to repair and rebuild materials that will be exposed to high temperatures in automotive and industrial maintenance applications.
CURE AND SET TIME: After kneading the two part formula together by hand, HighHeat takes 1 hour to set and cures in 8 hours.
PRODUCT FEATURES AND STRENGTH: J-B Weld HighHeat has lap shear strength of 800 PSI at room temperature and 600 PSI at 400oF (204oC) or more.
MAJOR USES: Exhaust Manifolds, Tail Pipes, Mufflers, Engine Blocks, Duct Work, Machinery and other high temperature equipment.
DO IT YOURSELF: Big or small, you can DIY it with J-B Weld.
3 times stronger at high temperatures
Withstands continuous heat up to 450 degrees Fahrenheit, and intermittent heat up to 500 degrees Fahrenheit.
Strength of 800 PSI at room temperature and 600 PSI at 400 degrees Fahrenheit
Perfect for tail pipes, mufflers, machinery, engine blocks, and exhaust manifolds
Special Shipping Information: This item cannot be returned and has additional shipping restrictions