RectorSeal®, the global leader in the life safety and passive fire protection industry, has consolidated Bio Fireshield®, FlameSafe® and Metacaulk® brands into one complete firestopping solution line – Metacaulk. The UL approved Metacaulk firestopping products, with maximum three-year shelf life, are specifically designed to fill voids in construction joints and around penetrations in fire-rated walls or floors.