12-4 BIW assembly 12. Body Sheet Metal and Paint Repair Manual Note: – The heat-resistant temperature means a temperature under which thermal deformation may occur during working. – Immersion means soaking in liquids. VOYAH FREE Code Material name Heat-resistant temperature ℃ (℉) Remarks TPU Thermoplastic polyurethane - elastomer 80 (176) Avoid immersion in alcohol, gasoline, solvents, etc. UP Unsaturated polyester 110 (233) Avoid alkaline substances.