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🔥 Stay cool under pressure—heat blocking made effortless!
The RT400P Viper Wetrag Heat Blocking Putty Jar is a 12 oz. reusable, high-viscosity putty designed to protect surfaces, valves, and sensitive components from direct and conductive heat during brazing, soldering, or welding. Compatible with multiple torch types, it offers a no-mess, water-activated formula that can be reused up to 40 times, making it an essential tool for HVAC professionals and welders seeking reliable heat resistance and surface protection.
| ASIN | B017T23T18 |
| Brand | Refrigeration Technologies |
| Brand Name | Refrigeration Technologies |
| Color | Gray |
| Compatible Material | Ceramic, Metal, Plastic |
| Container Type | Jar |
| Customer Reviews | 4.6 out of 5 stars 643 Reviews |
| Global Trade Identification Number | 00017857400082 |
| Item Form | Putty |
| Item Package Quantity | 1 |
| Item Weight | 1.6 ounces |
| Manufacturer | Refrigeration Technologies |
| Model | RT400P |
| Number of Pieces | 1 |
| Other Special Features of the Product | Heat Resistant |
| Part Number | REFRIGERATION TECHNOLOGOES - RT400P |
| Special Feature | Heat Resistant |
| Specific Uses For Product | Repair, Welding |
| UPC | 696335182315 017857400082 |
| Unit Count | 12 Ounce |
| Viscosity Level | High |
| Volume | 12 fluid ounces |
| Water Resistance Level | Water Resistant |
M**E
Keeps valves cool while soldering.
Excellent product to keep valves of any kind cool while soldering. Works excellent for HVAC valves.
A**R
Reusable
I use this all the time on my air conditioning jobs. It keeps everything cooler to prevent anything downstream from heating up. Great because it’s reusable I just peel it off the surface and put it back in the container.
N**H
Sucks away the heat
It does exactly what it says and helps protect what you don't want getting extremely hot. Ive used similar products, but the fact this is reusable puts this ahead of them
N**N
works well!
works well!
B**L
It works but...
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.
J**3
Good product and works as advertised.
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.
R**Z
A must have when brazing !
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
S**D
Great product
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
Trustpilot
1 month ago
2 weeks ago