Silpro’s FSB is a fiberglass surface bonding cement. This is a polymer-modified, Portland cement-based, trowel applied high performance surface bonding cement. It contains sized aggregates, fibreglass reinforcing fibers, and an integral waterproofing agent.
This material can be applied 1/8″ to 3/8″ thick, and it can provide a base for decorative coatings, and also can protect rigid insulation board. It waterproofs and protects surfaces and can be used above or below grade. It is fiber reinforced for bridging cracks and improving flexural and tensile strengths. Comes in a 50 pound bag.