Click to expand Tap to zoom Thermo-Tec® Heat Barrier more by Thermo-Tec® Sold out $106.00 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Sold out Heat Barrier by Thermo-Tec®. 1 Piece. 26" x 40". The Heat Barrier is made from with a Mylar finish. The Barrier can withstand up to 3000 degrees F of radiant heat and can withstand direct contact up to 800 degrees F.