SOPRABASE S is an SBS modified bitumen-coated polyester-reinforced base sheet for use in multi-ply membrane assemblies. SOPRABASE S may be utilized as a mechanically fastened anchor sheet or adhered in approved multi-ply membrane assemblies. SOPRABASE S is manufactured with a sand parting agent applied to the top and bottom surfaces, and with laying lines printed
on the top surface.

Installation

SOPRABASE S may be fastened to nailable substrates when approved as an anchor sheet in multi-ply membrane assemblies. SOPRABASE S may be installed via cold adhesive or mechanically fastening. An approved SOPREMA SBS modified bitumen base ply is adhered to the top surface of SOPRABASE S with a cold adhesive and the SOPREMA® SBS modified bitumen cap sheet is installed above. Refer to the SOPREMA SBS Roofing Guide for additional application guidelines.