AutoButyl RVX is a heavy-duty RV roof seal repair tape made from ultra-sticky butyl rubber with a UV-resistant backing. It instantly seals leaks, cracks, and seams to create a permanent, waterproof barrier on RV roofs and exterior surfaces. Designed for long-lasting outdoor performance, ButylFlex RVX bonds securely to EPDM, TPO, metal, fiberglass, vinyl, and more—ideal for RVs, campers, trailers, mobile homes, and boats.