I wouldn't trust jb weld. I love JB Weld products, but if your radiator is leaking just bite the bullet and replace it. ADD TO CART. Checked it everyday for a week. Directions are mix the two parts, apply mixture to crack, apply cloth, paint more mixture on the cloth. J-B Weld Perm-O-Seal is a specially formulated non-toxic compound ground to a very fine particle size to quickly mix and flow into all areas of the cooling system to find and seal leaks. I was not able to do this without pulling out my $60 radiator due to where the crack was, thus making a $15 "band-aid" take as much labor as a $60 replacement. On paper, it sounds like JB Weld is perfectly suited for patching a small leak in a radiator. Like other epoxies, JB Weld is a two-part adhesive that consists of a resin and a hardener. PRODUCT SPECIFICATIONS. SKU # 435525 $ 14 99. BUT, aftermarket plastic radiator bowls last about 4 years in my experience. The need for sealants and epoxies that can withstand the pressure and vibration that occurs within the transmission, oil cases and cam shafts makes the choice of the room temperature gray silicone a winner for repairs in these areas. J-B Weld's WaterWeld (pictured) is a specially formulated epoxy putty that can be applied to a wet, leaking or underwater surface. alumiweld, jb weld will be your best friend with this. UPDATE (EDIT): After a week of JB WELD my radiator's crack (on top of the plastic neck going into the hose on the driver's side), a 70 mile constant highway run at an ambient temperature of 70F does NOT blow the glue! JB KwikWood; JB WoodWeld; Automotive. Think this will work well? When it's time to apply the resin, I mixed the compound for the recommended amount of time, then went to apply it on my 1.25"x4" area and before I could barely get the mesh fabric covered good, the resin had set and was no long pliable. 2. In-Store. What do you think about J B Weld for on the trail fix-its ? VERSATILE & DEPENDABLE: Great for radiators, washer fluid tanks, storage tanks, water tanks, plastics, composites, PVC and more. Make sure to work quickly, as the J-B WELD sets very fast. Teaching people is her passion and she works with children on a regular basis instructing them on art and basic biology and gardening. You can definitely fix a radiator leak with JB Weld. Helpful. … To do this, make sure your engine has cooled for several hours, your battery is disconnected and the engine is covered with an approved blanket or tarp to prevent splashing from reaching it. I love JB Weld products, but if your radiator is leaking just bite the bullet and replace it. Water Weld Epoxy Putty; Plastic Weld Syringe ; Plastic Weld Epoxy Putty; JB Radiator Weld; JB ClearWeld™Syringe; Wood. About 6 weeks latter I had another leak about 6 inches from the original repair. It can be formed, drilled, ground, sawn, tapped, machined, filled, sanded, painted and applied under water. I would def just like to replace it with an aluminum radiator but don't have the money right now, so has anyone fixed a crack like this with JB weld or anything of the sort with positive results? Specifications. 3 Apply. Questions and Answer . I followed all of the directions and still it didn't seal. and your done. Buy a Radiator Smells like regular JB Weld. Choose an item or category to find the specific products you need. Fixing the radiator inside the car, drain any water to underneath the leak or crack line. It is great for repairing cracks, small gaps, seam connections or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fire boxes, gas and commercial furnaces and … Here's my complaint, whether I could open up the crack or not, it would not have made a difference given the dry time of the resin. 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