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Mule-Hide Products Co. has expanded its Silicone Roof Coating System with Multibase SB, a new primer that delivers stronger adhesion and prevents asphalt bleed-through in non-ponding water conditions.
Multibase SB is a one-part, 100 percent acrylic-based resin intended for use as a primer prior to the application of Mule-Hide 100% Silicone Roof Coating. It can be used on modified bitumen, asphaltic built-up roofing (BUR) and PVC roof surfaces.
The primer contains minimal pigment and no mineral fillers, enhancing its adhesion to the roof surface. In addition, its relatively thin viscosity and low surface tension allows the primer to completely saturate the roof surface, further helping form a strong bond.
Multibase SB blocks asphalt bleed-through, helping ensure that white finish coats are clean and bright and deliver optimal reflectivity.
The primer can be applied using airless spray equipment, a roller or a brush. Its light yellow color cures to a darker amber hue as the coating dries, providing visual confirmation that the coating has cured and the finish coating can be applied.
It is not intended for use on coal-tar-pitch roofs, on TPO membranes or in areas that experience ponding water.
Multibase SB is available in 5-gallon pails and 55-gallon drums.