Vacuum bag membrane is a copolymer film. It has good extensibility, barrier air and automatic demoulding, so it can be directly contacted with resin, mainly for composite material at room temperature molding, vacuum guiding and pre compaction.Technical ParameterNote:if you order 4m width 1pc, size 4m*1m,2pcs 4m*2m......Maximum use temperature: 170 degrees centigradeElongation (%): longitudinal 450 + 10% transverse 460 + 10%Tensile strength / (Mpa): longitudinal 450 + 10% transverse 460 + 10%Anti puncture: 1.2NOperation instructions:1. should avoid the sharp object as far as possible.2. operation to ensure the surface of the product surface water, no oil stains.Photos:More infos