Mastercool 90935 Alum Bond Aluminum Repair Compound – High-Strength Aluminum-Filled Epoxy for Castings, Radiators, Tanks & Engine Components – Machinable Metal Repair Solution

Worked perfectly... you must only apply on bare metal (die cast aluminum). Strip or file all paint off of the application area and definitely wipe clean with 99% alcohol or 70% and use heat gun/dryer to remove any traces of water. I cured the repair areas for 24hrs. This product is also paintable and does not promote rust.

This is a good product, I tested it against JB Weld and it adhered better and was stronger. I would expect that, since it is designed to seal high pressure refrigerant leaks, I was not disappointed. I used it to fill gaps, holes, and other flaws in my aluminum boat instead of having everything heli-arced, worked well.

I bought this as a hail Mary repair to the front cover of my 7.3 diesel engine. It's got a crack that isn't accessible to weld and replacing the part involves engine removal. The area is subject to 75 psi oil as well as high temperature.. this product was easy to mix and apply and it's working beautifully!

I had a puncture in the side of my pontoon boat, on the underside of one of the logs. I applied this material and it stayed in place and bonded really well.

I needed to stop cracks in a boat trailer fender. This and some backing material has worked very well.

Sello la fuga de condenser...y volvió a funcionar!!!

This stuff worked GREAT!!! I had a leak in my minisplit condenser coil and this patched the hole. I let it set over night then pressurize the coil to 317 psi and it held for over an hour, passed my test.

It looks like epoxy. But it’s not epoxy. Followed directions exactly - portions measured by weight, correct temperature range and mixing time. After an hour the mixture had not even begun to set up. Wiped it all off with denatured and used a different epoxy from a reputable brand, with a finished product in under an hour. This is the worst “epoxy” imaginable. Save your time and money. I threw rest of product in the trash.