A one-part, ready-to-use, re-enterable, intumescent putty that can be easily formed to
firestop through penetrations and blank openings in fire-rated assemblies. Often used to
fill voids in large openings and/or complex firestop systems.
- Up to 4-hours fire ratings per ASTM E 814 (UL 1479)
- Provides draft and cold smoke seal
- Helps reduce noise transfer (STC-Rating of 56 when tested in STC 56-rated wall assembly)
- Noncorrosive to metal and compatible with synthetic cable jackets
- Will not dry out or crumble, re-enterable