SpecSeal® Series SSP Putty is a non-hardening, intumescent compound designed to seal through-penetrations as well as certain membrane penetrations against the spread of fire, smoke and toxic gasses. SpecSeal Putty expands up to 8 times its original size when exposed to high temperatures or flames.

Requiring no tools, SpecSeal® Putty is soft and pliable making it easy to install by hand packing into openings. Its aggressive adhesion makes it suitable for use with all common construction materials as well as cable jacketing and pipes. SpecSeal Putty remains soft and easy to reuse or retrofit.

• Non-hardening for easy installation and retrofitting of cables.
• Two-Stage Intumescence provides aggressive expansion.
• Highly adhesive: stays put!
• Unaffected by humidity, condensation, water.
• Soft, pliable, easy to install.
• Tested and proven acoustical properties.
• No tools required.
• UL Classified (up to 3 hr.)
• FM Approved.