Check your rubber roof’s warranty before repairing any tears, holes or other damage. Fixing damage yourself may void the warranty.
Climb on the roof and inspect it for any tears, holes or other damage. Once the damaged area is isolated, mark it with a chalk “X.”
Put on rubber gloves and dampen a rag with EPDM (ethylene propylene diene monomer) rubber cleaner and wipe down the damaged area to remove any mold, mildew or dirt. Remove difficult stains by working cleaner into the roof with a wire brush. Allow the roof to dry completely before continuing.
Apply a thin layer of EPDM primer to the damaged area with a natural-bristled paintbrush. Extend the primer at least 3 inches around the damage to ensure the area is sufficiently covered. Allow the primer to dry for at least eight hours before continuing
Cut a piece of rubber roof patch to fit the damaged area with a sharp knife. Once again, extend the length of patch 2 to 3 inches beyond the tear to ensure the leak is completely covered.
Cover the primed area with a thin coating of rubber roof adhesive. Center the patch over the adhesive and press it down firmly. Run a silicone roller over the patch to remove any air bubbles and ensure that it adheres effectively.
Allow the adhesive to dry for at least 24 hours before running a thin bead of EPDM caulk around the patch’s perimeter.