The HT-4000 High Heat Curtain is made from High Silica Fabric that is 96% Pure, and then coated on one side with a special Aluminized Coating. This High Heat Curtain is meant for applications that need very high temp heat shields, with good insulation properties, and excellent reflective qualities. Reflects up to 90% of Heat Sources. The HT-4000 is flexible and is used on our Track and Roller System as a moveable or stationary barrier. Options include pockets with chain, high heat velcro, extra grommets, and cut outs.