Refrigeration Technologies RT400P Viper Wetrag Heat Blocking Putty Jar (1), 12 oz.

Super impressed with this product. Definitely work to keep heat away from filter drier. I've seen some videos where you can use actual wet rags. I prefer to have this and keep it in welding pack. Putty is reusable and has been good for me.

Holds water, molds well to an eccentric surface, and keeps refrigerant valves cooler during brazing. Worked well on the liquid line repair job that I bought it for. Would recommend and use in conjunction with a wet rag to get the best cooling.

Fantastic stuff!

This stuff is great! definitely keeps piping down line from overheating. Once you pack it on it is a little tough to get it all off, but not a real issue

It works well but removing and reusing it is a bit dicey. The burned material is difficult to separate from the good portions so it doesn't stay in place well on next brazes. Even wetting my hands slightly to reform or regenerate the material it just gets harder to work with.

awesome product! Iv been using this for years now and have yet to find a better brand. TBH I’m not even willing to try another brand it works so well

Viper Wet Rag (VWR) got me out of a jam. Had to heat water heater anode rod head in order to remove, without damaging tank glass lining and top cover paint. Molded VWR around anode rod, exposing only bolt head. Extended VWR around top of rod installation hole (top cover of water heater). Applied heat (propane) to anode rod bolt head (less than a minute). Gave rod head 2 short "braaps" with impact gun. Anode rod came out slicker than poop through a goose. Upon removal of VWR, surrounding foam insulation and water heater top cover paint were in pristine condition. Amazing product!!

With the crazy economy we find ourselves, my son and I ended up doing our own AC repair. We replaced our A-Coil and outside condenser unit with all the filters, fittings, etc. We also decided to use the solder with flux method as opposed to the silver rod brazing method. We were successful just before the hot muggy weather overtook our part of the country. We used this product to manage the heat transfer and avoid damaging other components in our high pressure line and liquid line. It worked well and was easy to apply and remove.