Metacaulk® Intumescent Putty Pads are a moldable, non-curing, one-component fire-rated material for through-penetration firestop systems. Therefore, when heated, Metacaulk® Fire Rated Putty Pads will expand, forming an insulating char.

In a fire, Fire Rated Putty Pads prevent the spread of flames, smoke, gas, and water through penetration openings.  Installers apply them by hand—no mixing or special skills are required..

Metacaulk® Putty Pads are rated for up to 3 hours in accordance with ASTM E 814. UL 1479 and ULC/CAM4-S115M test standards.

Putty Pads: Various Applications

• Metal or Non-Metallic Outlet Boxes
• Metal or Non-Metal Electric Boxes
• Small Openings
• EMT Pipe
• Steel, Conduit, and Cabling (Telephone,  Power, Communications)

Putty Pads Features

• It is for interior use and does not contain Volatile Solvents, making it useful in confined spaces or occupied areas. It does not contain Asbestos Fillers.   The DOT Classification is Not Regulated.
• Applied by hand and Easy to install- mixing is never required, and no special skills or additives are necessary for installation. Adheres to all ordinary building common surfaces
• The maker assigns a rating of up to 3 hours to the pads per the fire test standards ASTM E814, UL 1479, and ULC/CAN4-S115-M.
• They also have a Sound Transmission Class (STC) rating of 60.
• A single pad thickness of 1/8″ is sufficient to achieve a 1- to 2-hour fire rating.
• Installers do not need any extra putty to plug the end of each EMT tube or conduit at its box connection.
• Required by Building Codes in rated partitions where horizontal separation of opposite-facing electrical boxes is under 24 inches

Firestopping Essentials That Work Together

Installers commonly select these products together to ensure they do the job right for passive fire protection.

• Wrap Strips – For sealing penetrations and pipe openings
• Joint Strips – Ideal for construction joints and seams
• Box Guards & Cover Guards– Protect electrical boxes and outlets
• Putty Pads & Sticks – Quick, moldable solutions for tight spaces

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Contact us for more information on fire-stopping options.