COLVENT™ SA is an SBS-modified bitumen base ply for use in approved multi-ply membrane and flashing assemblies. COLVENT SA is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen in combination with high tack self-adhesive ribbons and is reinforced with a high quality random glass fiber mat. The ribbon strips are arranged in a pattern to vent vapor pressure between the substrate and the COLVENT SA. The topside is surfaced with fine mineral aggregate to optimize cold adhesive and hot asphalt applications and the underside is surfaced with protective polyolefin release film that is removed during application.
Prior to installation, unroll COLVENT SA onto the roof surface and allow to relax. Place COLVENT SA in desired position. Remove the protective release film from the underside of the sheet and roll COLVENT SA into place with a weighted roller. Subsequent approved inter-ply or cap ply membranes are applied to COLVENT SA via cold adhesive or hot asphalt. Refer to the SOPREMA SBS Roofing Manual for additional application guidelines.