VEVOR Roll Roofing, 20 x 20 ft, 45 mil EPDM Rubber Roofing, Long Lifespan & Weather-resistant, Withstands Harsh Temperatures, Flexible & Easy Installation, Roof Underlayment for RVs, Roofs, Ponds

For installing the VEVOR EPDM roofing membrane on OSB3 or insulation boards, we recommend using an EPDM-compatible bonding adhesive. A water-based EPDM bonding adhesive is generally suitable for absorbent surfaces such as OSB3, while a solvent-based contact adhesive may be required for certain insulation materials or non-porous surfaces. If this answer does not resolve the current issue, please contact us again for assistance.