COLVENT™ 180 SA is an SBS-modified bitumen base ply for use in approved multi-ply membrane and flashing assemblies. COLVENT 180 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 tough, dimensionally stable non-woven polyester mat. The ribbon strips are arranged in a pattern to vent vapor pressure between the substrate and the COLVENT 180 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 180 SA onto the roof surface and allow to relax. Place COLVENT 180 SA in desired position. Remove the protective release film from the underside of the sheet and roll COLVENT 180 SA into place with a weighted roller. Subsequent approved inter-ply or cap ply membranes are applied to COLVENT 180 SA via cold adhesive or hot asphalt. Refer to the SOPREMA SBS Roofing Manual for additional application guidelines.