Reflect-A-Cloth Silver 33cm x 50cm x.4mm thick Thermal Heat Shield. Extreme flexibility makes our Reflect-A-Cloth Rolls ideal for many applications. Reflect-A-Cloth is thin enough not to interfere with carpet installation. Reflect-A-Cloth works best placed underneath the vehicle or on the firewall inside the engine compartment, stopping heat at its source. Place the aluminised side towards the source of radiant heat to shield heat away. Fibreglass base fabric withstands 550⁰C continuous radiant heat + Metalised foil resists 200⁰C of direct heat, before it begins to break down.