This permanently soft and flexible sealing/insulating electrical compound is for use in applications such as blocking and filling electrical components e. g cables, chokes, junction boxes, couplers, glands, switchgear etc. Seal cable penetrations with our modular firestop solutions, designed to create water-, smoke- and gas-tight barriers in energy and industry projects both onshore and offshore. This non hardening electrical compound prevents electrical leakage or short. Beele / CSD offers a wide variety products and solutions to address virtually any type of pipe penetration application. You can review our different products below. * Two (2) sticks of moldable putty (part number FSP-MPS) are also needed for each opening. UL Listed Systems Concrete Wall - C-AJ-4056 3 HR F-Rating, 3/4 HR T-Rating Gypsum.