SOPRABOARD® asphaltic cover board is a semi-rigid roofing substrate board for use in multi-ply membrane and flashing assemblies and also serves as a protection board for waterproofing applications. SOPRABOARD® is composed of a mineral fortified asphaltic core formed between two fiberglass reinforcing plies designed for compatibility with heat welded, cold-adhered, self-adhered or hot mopped assemblies. SOPRABOARD® is available in a wide variety of lengths and thicknesses.