It's time to upgrade your packaging game to the next level! Solvent proof. FEP clear concentrate sheet is an advanced fluoropolymer FEP commonly used in the medical industry. FEP is made out of PTFE and another fluorinated polymer giving it excellent chemical resistance. FEP is softer and easier to fold than PTFE making it perfect for large-scale packaging. This product is UV resistant and optically clear allowing a perfect view of what is inside. CannaAroma company's product is always made from the highest quality Fluoroelastomers and meets guidelines for food contact surfaces. Our packaging is safe, and 100% contamination free.