The Bernzomatic HC9X12 9" x 12" Heat Cloth™ Protects Against Flames, Heat And Sparks. The HC9X12 is used to help protect from burn damage while brazing, soldering, heating, or sweating. The heatcloth won"t burn, melt, curve or allow heat To penetrate when exposed to flames up to 2192 Degrees Fahrenheit, 1200 Celcius for 3 minutes. The user can double and triple up to add more layers of cloth for added protection.Protect Surfaces During SolderingProtects for three minutes against tempatures up to 2100 degrees F.Able to fold for additional protection