SOPRAMASTIC ALU is a modified bitumen mastic for use in approved multi-ply membrane and flashing assemblies. SOPRAMASTIC ALU is composed of a proprietary formulation of elastomeric modified bitumen and solvents. SOPRAMASTIC ALU is aluminum hued for application to membrane edge and perimeter metal.
SOPRAMASTIC ALU is applied to the approved area via a caulking gun. Refer to the SOPREMA® SBS Roofing Manual for additional application guidelines.