3M Fire Barrier Moldable Putty Pads MPP+ are a one-part firestop material used in various fire-rated assemblies, such as electrical box protection. Designed to prevent the spread of fire, smoke and noxious gasses, this intumescent material comes ready to use in convenient 1/10 (2.54 mm) thick pads that are conformable by hand with no mixing or tools. Pads are firestop tested up to 4 hours.

Features:
Pliable one-part intumescent firestop material is designed for wall openings and through penetrations
Provides draft and cold smoke seal, helps reduce noise transfer
Firestop tested for through penetration and membrane applications for up to 4 hours in accordance with ASTM E 814 (UL 1479)
Excellent adhesion to a wide range of construction materials
Non-corrosive to metal, and compatible with synthetic cable jackets
Applied by hand, with no mixing or tools