3m Flexible Fireproof Putty for Wall Constructions

The intumescent putty pads are firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479). When installed in accordance with the UL wall-opening protective listing, they are tested up to 2 hours in accordance with ASTM E 119 (UL 263).

The material is a one-part ready-to-use putty that can be applied by hand. It requires no mixing or tools. Technicians can mold the material directly onto the substrate. For larger applications, self-adhering pads can be molded together.

Typical applications include protection of membrane penetrations for listed electrical boxes, wall opening protection, sealing gaps between cables in multiple penetrations (including fiber optic inner ducts), and sealing insulated pipes, electrical conduits, and metal pipe penetrations.

Yes, the putty exhibits excellent adhesion to most construction substrates and is non-corrosive when applied to metal. It is also safe for applications involving synthetic cable jackets, making it suitable for firestopping cable bundles.

Yes, the material helps reduce noise transfer. It has an STC Rating of 52 when tested on back-to-back electrical boxes and can achieve an STC Rating of up to 62 in a 62 Rated Wall.