Flintglas® MS Cap is a roll roofing product designed for use as a cap sheet in built-up roofing systems. It also may be used as a heavy duty, venting-type base sheet when installed mineral side down and either mechanically fastened or spot mopped over lightweight insulating concrete decks or existing smooth surfaced membranes. It is suitable for both new construction and reroofing applications over a variety of substrates. It is surfaced with ceramic granules to provide a durable, heat-reflective weathering surface when used as cap sheets. Non-modified, extra-strength fiberglass reinforced cap sheet with granule surface.