Liquid EPDM Rubber® is one of the most innovative products for roof coating and EPDM Rubber Roof Repair on the market today. Initially created 20 years ago as Liquid Roof® to recoat RV roofs, overwhelming response to the product created a new market and product, EPDM Liquid Rubber® for industrial and commercial roofs. Liquid Rubber Covers 42 - 46 Sq. Ft. Per Gallon. Click for Installation Instructions. Buying 25 Gallons or More? Volume Pricing Available no phone call required!