Extreme Heat Resistance (3000°F+) – Carbon Fiber Welding Blanket Made of high-density carbon felt welding blanket, our fireproof welding blanket certified to ASTM D6413 and UL94-V0, withstands extreme temperatures over 3000°F — Outperforms standard fiberglass welding blankets (1000°F limit)Much more effective at stopping spatter than fiberglass offerings, and doesn't shed glass fibers!