Whether you need to firestop outlet boxes or small cable penetrations, you will find the solution here – our quick to install putty pads, putty sticks and cable discsWhether you need to firestop outlet boxes or small cable penetrations, you will find the solution here – our quick to install putty pads, putty sticks and cable discsThe following charts give the number of 3M pillows needed to completely firestop an opening that cable tray passes through. * 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. Shipping fee and delivery date to be negotiated. Chat with supplier now for more details. Self-adhesive discs of firestop putty for single cables, conduits and bundles in openings up to 1" Please Log in or register to see your company prices. Fire resistance tested in flexible walls, rigid. Check each product page for other buying options.