594/2009 - Item 2: Fluoroelastomer O-ring seals (vinylidene fluoride and hexafluoropropylene copolymer). The constituent material of this product (vinylidene fluoride and hexafluoropropylene copolymer) displays the stretching and recovery properties of elastomers, but cannot be vulcanised with sulphur. In order to crosslink, it requires basic compounds or certain peroxides. - The Trade Hub