Multibase SB is a one-part, 100 percent acrylic-based resin roof primer that goes on before Mule-Hide’s silicone roof coating. Compatible with modified bitumen, built-up roofing and PVC.
Prevents asphalt bleed-through in non-ponding-water conditions to ensure white finish coats are clean and reflective. Minimal pigment content and no mineral fillers. Apply with spray, roller or brush.