The CHEMLAMÂ® series features unique combinations of multi-layer fluoropolymer films laminated to a variety of reinforcement fabrics. The RL product line features a film of fully sintered PTFE for low friction, flame resistance, chemical and barrier properties. ChemlamÂ® RLÂ® series is a high performance composite that has desirable elongation properties, and is easy to fabricate using standard techniques such as sewing for conversion to finished articles.RL 6000 Reinforcement: Polyester/Cotton Blend. All data based on a 0.0067 inch test sample. Information provided by Saint Gobain Performance Products.