Choosing the Right Heat Protection for Brazing Jobs
When you’re working around an open flame, protecting components from heat damage is critical. Whether you’re brazing lines in tight spots or working in wide-open areas, Viper offers three solutions you can count on: WetRag Putty, Heatshield, and Heat Blocking Gel.
Here’s how to choose the right one for the job.
WetRag Putty – Soaks Up the Heat
Viper WetRag Putty is made from the same material used in the heat shield of the space shuttle. This moldable, reusable putty blocks direct and conductive heat, keeping valves, tubing, and nearby components cool during brazing, soldering, or welding. WetRag can withstand temperatures exceeding 2000°F and is compatible with MAP/Pro, Oxy/Acetylene, TIG, MIG, ARC, and propane torches. The putty molds easily to fit around piping, valves, and sensitive components, forming a reliable thermal barrier. After use, it can be removed cleanly with no sticky residue and reused up to 40 times.
Why Use It:
Reusable up to 40 times
Withstands temps over 2000 °F
Indicator dye fades when it’s time to replace
Silica-free and non-toxic
More effective than wet rags
Best For: Compact spots, quick jobs, and valve protection
Heatshield – Blocks High Temps
Viper WetRag Heatshield is a flame-resistant welding pad that protects surrounding areas from fire and heat transfer damage, it blocks direct and conductive heat transfer during brazing, soldering, or welding applications. Made from flame-resistant absorbent carbon with a woven fiberglass core, it withstands continuous temperatures up to 2500°F and can be used wet or dry depending on the application. Heatshield also meets the ANSI/FM 4950 standard for hot work protection, making it ideal for use in both field and shop environments requiring professional-grade thermal shielding.
Why Use It:
Use it wet or dry
Machine washable and reusable
Shields wood, walls, flooring, and insulation
Perfect for repeated, high-temp applications
Best For: Open work areas, panel protection, repeat use
Heat Blocking Gel – Spray-On Protection
Viper Heat Blocking Gel is a high-viscosity, sprayable, non-toxic coating formulated to protect surrounding surfaces from heat or open flame during soldering or light torch work. It creates a temporary thermal barrier that helps prevent fire or damage to nearby materials such as wood, drywall, fabric, wiring, and insulation. The gel is non-corrosive, chemically inert, and leaves no residue, wiping off easily after the job is done.
Why Use It:
Clings to surfaces and wipes off clean
Non-toxic and odor-free
Great for odd shapes or overhead work
Ideal for quick jobs and temporary protection
Best For: Low-temp applications, overhead application, tight fits
See how it holds up in this extreme heat test.
Want to get your hands on the right heat protection for the job?
Find a distributor near you using our product locator and see where to pick up WetRag Putty, Heatshield, or Heat Blocking Gel in your area.