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STI SpecSeal SSP4S Fire Barrier Putty Pad 7.25in x 7.25in x 3/16in SSP4S
Non-hardening, intumescent compound designed to seal through-penetrations as well as certain membrane penetrations against the spread of fire, smoke and hot gasses
- Requires no tools
- Aggressive adhesion
- Expands up to eight times in size
$5.47
Availability:
In stock
( 500 Available )
SKU
22999
STI SpecSeal SSP4S Fire Barrier Putty Pad – 7.25 in x 7.25 in x 3/16 in
SpecSeal SSP4S is a non-hardening, intumescent putty pad for protecting electrical boxes and similar penetrations in gypsum wall assemblies. The pad installs cleanly without tools, adheres to common construction materials, and remains soft for easy retrofit. Under fire exposure it expands to help block flame, smoke, and hot gases while also reducing sound transmission.
Key Features
- Non-hardening, reusable compound simplifies retrofit work.
- Intumescent formulation expands under heat to help seal openings.
- Soft, pliable pad applies by hand; aggressive adhesion keeps it in place.
- Excellent sound attenuation; helps reduce noise transmission.
- Zero VOC; no water-soluble intumescent ingredients.
- Tested and listed for use in rated gypsum wall assemblies.
- Made in the USA
Applications
- Wrapping standard 4S electrical outlet or switch boxes to improve fire and smoke resistance.
- Membrane penetrations such as med-gas valve boxes, clean-out tees, and tub/shower valves.
- Through-penetrations, blank openings, and construction gaps in gypsum wallboard assemblies.
- Situations requiring a cushioned seal to accommodate vibration or minor movement.
Technical Specifications
| Pad Size (this item) | 7.25 in x 7.25 in x 3/16 in (SSP4S) |
| Color | Red |
| Type | One-part, non-hardening, intumescent putty pad |
| Volume Expansion (free) | Greater than 500% |
| Expansion Start Temperature | About 230°F (110°C) |
| Solids / VOC | 100% solids; 0 g/L VOC |
| STC Rating | 62 (relates to specific construction) |
| In-Service Temperature | 10°F to 120°F (−23°C to 49°C) |
| Installation / Storage Temperature | Less than 100°F (38°C) |
| Compliance | ASTM E814 (UL 1479), CAN/ULC-S115, UL 263 (ASTM E119, NFPA 251); listed for use as a Wall Opening Protective Material up to 2 hours |
| Each Weight / Case Quantity | Approx. 0.64 lb each; 20 per case |
| Shelf Life | No stated limit (store below 100°F) |
Frequently Asked Questions
What box size does one pad cover?
The pad is sized to fit a typical 1.5 in deep 4S box with no cutting or piecing required.
Is it compatible with plastics and cable jackets?
It is designed to be safe with many plastics; confirm with the pipe, tubing, or cable manufacturer for specific materials.
Does it harden?
No. It remains soft and pliable for easy adjustments and retrofit work.
How does it help with sound?
The pad provides excellent sound attenuation and can help reduce noise transmission through outlet boxes.
Any electrical precautions?
Do not apply to exposed or energized conductors. Follow standard electrical safety practices.
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