3M Fire Barrier Sealant CP 25WB+

Overview

3M Fire Barrier Sealant CP 25WB+ is a one-component, latex-based, intumescent sealant that dries to form a monolithic firestop seal and also acts as a barrier to airborne sound transmission (STC rating of 54 when tested in a STC 54-rated wall assembly). As penetrants are exposed to fire, the intumescent property of the material allows the sealant to expand and help maintain a firestop penetration seal for up to 4 hours, when installed in accordance with a listed through-penetration or fire-resistive joint assembly system. It is firestop tested for through-penetration applications in accordance with ASTM E814 (UL 1479) and CAN/ULC-S115, and fire-resistance tested for static construction joint systems in accordance with ASTM E1966 (UL 2079). The halogen-free sealant expands a minimum of 3 times its dried volume when exposed to temperatures above 1000°F (538°C). It firestops blank openings and penetrations passing through fire-rated floor, floor/ceiling or wall assemblies, bonds to concrete, metals, wood, plastic and cable jacketing, is sag-resistant, water-based and paintable, and is re-enterable and repairable. It is applied with conventional caulking equipment, with no mixing required.

Specifications

Base Type

Latex-based intumescent sealant

Service Temperature

Expands above 1000°F (538°C)

Certifications

ASTM E814 (UL 1479), CAN/ULC-S115, ASTM E1966 (UL 2079)

Technical Information

• Firestop tested up to 4 hours (ASTM E814 / UL 1479)
• Expands at least 3x its dried volume above 1000°F (538°C)
• Water-based, paintable, re-enterable and repairable

Typical Applications

• Pipe and cable through-penetrations in rated assemblies
• Sealing blank openings in fire-rated floors, ceilings and walls
• Metallic and non-metallic pipe penetrations

Industries

Technical Documents