Versico's VersiGard Expansion Joint Supports are made of high-quality extruded EPDM and are compatible with VersiGard EPDM, VersiWeld® TPO, and VersiFlex™ PVC, and KEE HP Roofing Systems. A roofing membrane usually experiences a combination of tension and shear forces due to expansion/contraction and building movement. Versico's Expansion Joint Supports allow for rubber-to membrane contact and improved flexibility at joints.