The Everkem Fire Rated Intumescent Putty Pad is a 7" x 7" x 1/8" thick non-curing intumescent fire barrier designed for gypsum fire-rated wall systems. Everkem Diversified Products manufactures this repositionable putty pad to provide 1 and 2 hour fire protection while maintaining a 60 STC sound rating. The pad meets ASTM envelope standards including ASTM-E84 and ASTM-E90 specifications.
This UL Classified firestop pad features long shelf life storage and an identifiable color for easy field recognition. The non-curing formula allows contractors to reposition the pad during installation without losing effectiveness. The product carries EcoSeal environmental certification and Made in USA manufacturing. Installation requires no special tools or curing time, making it ideal for electrical outlet boxes, switch boxes, and other penetrations in fire-rated assemblies.
The putty pads work in both new construction and retrofit applications where maintaining fire ratings and sound control is critical. Contractors use these pads in office buildings, hospitals, schools, and multi-family housing projects to seal around electrical devices while preserving wall assembly performance ratings. Our putty pads for electrical boxes guide covers when the IBC requires them, the box-size and spacing rules, and how many pads to order per job.
Where this putty pad gets used
- Outlet, switch, and junction boxes — back-coats steel or PVC boxes in fire-rated gypsum walls (UL 1- and 2-hour designs)
- Side-by-side boxes on opposite faces of a party wall — restores STC 60 sound rating after the box cuts the assembly
- Data, communication, and low-voltage boxes in shared corridors, demising walls, and shaft walls
- Multi-family, hotel, dorm, hospital, and school tenant improvement work — anywhere IBC Section 714 or NFPA 101 requires the wall rating preserved at penetrations
- Expansion-activated — moldable putty stays flexible until 220°F, then expands to seal the cavity in a fire event
- No tools, no cure time, cut & peel — peel, mold around the box, press. One 7×7 pad covers a standard single-gang box
Functional equivalent to: 3M Fire Barrier Putty Pads MPP+ · STI SpecSeal SSP4S/SS9S · Hilti CP 617 · Rectorseal Metacaulk 66335 · Boss 81807. Per Everkem’s published Product Cross Reference — confirm spec requirements before substituting.
Technical Details
Key Specs
| Pad size | 7" × 7" × 1/8" (177.8 mm × 177.8 mm × 3.175 mm) |
|---|---|
| Fire rating | Up to 2 hours |
| STC rating | 60 (ASTM E90) |
| Activation temperature | Expansion begins at 220°F (104°C) |
| VOC content | < 10 g/L |
Full Specifications
Typical Physical Properties
| Materials | Intumescent putty |
|---|---|
| Asbestos fillers | None |
| Solvents | None |
| Hazardous ingredients | None |
| Activation of intumescence | Expansion begins at 220°F (104°C) |
| ASTM E84 | 10 Flame Spread / 125 Smoke Developed |
| ASTM E90 | Tested in a 60 STC assembly |
Available colors: Red
Applications
- Multi-family and commercial construction
- Metal or non-metallic electrical boxes in fire-rated gypsum walls
- Acoustical pad to achieve or maintain required STC rating
Advantages
- Tested to ASTM E84 performance criteria (10 FS / 125 SD)
- Meets ASTM E90 performance criteria (60 STC)
- Up to 2-hour fire-rating
- Easy installation — peel, mold, press
- Non-curing, moldable, and repositionable
Limitations
- To be used only in the tested configurations or as recommended by Everkem Diversified Products
Compliance & Standards
CSI specified divisions
- 07 84 00 — Firestopping
- 26 00 00 — Electrical
Applicable standards
- ASTM E84 — Standard Test Method for Surface Burning Characteristics of Building Materials
- ASTM E90 — Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss
EcoSeal (low-VOC) compliance
- V.O.C. Content: < 10 g/L
Sizes & Part Numbers
| Part # | Description | Packaging | Color |
|---|---|---|---|
| FT-00732 | Intumescent Fire-Rated Putty Pad — 7" × 7" × 1/8" (177.8 mm × 177.8 mm × 3.175 mm) | 20 pads/case | Red |
Equivalent Products from Other Brands
Switching brands? This Everkem product is a functional equivalent to the competitor SKUs listed below per Everkem’s published Product Cross Reference. Formulations, cure times, and exact specs vary by manufacturer — confirm your project’s spec requirements before substituting.
| Brand | Part Number | Product Name |
|---|---|---|
| 3M | MPP+ | 3M Fire Barrier Putty Pads MPP+ |
| Boss | 81807 | Boss Firestop Putty Pads |
| Hilti | 309760 | Hilti Putty Pad CP 617 |
| Rectorseal | 66335 | Metacaulk Fire-Rated Putty Pads |
| STI | SSP4S, SS9S | SpecSeal SSP Fire Stop Putty Pads |