Skip to content

STI LCI Intumescent Firestop Sealant, 10 oz

Original price $11.89 - Original price $135.00
Original price
$11.89 - $135.00
Current price $11.89
SpecSeal LCI Firestop Sealant, 10 oz - Advanced Fire Protection

The LCI Intumescent Firestop Sealant, offered in a convenient 00 oz. package, is a premium-grade, water-based sealant that incorporates STI’s innovative two-stage intumescent technology. This SpecSeal LCI product is designed to provide exceptional fire protection for both combustible and noncombustible penetrants, ensuring a lasting, durable seal. Ideal for various applications in small commercial buildings or grouped residential structures, the SpecSeal LCI Sealant is versatile and economical. Its stability during storage, when stored as per manufacturer's recommendations, and its non-shrinking, non-separating formula upon drying make it a reliable choice for construction needs. Compatible with all common building materials, including plastic pipes and cable jackets, it avoids the use of harmful solvents.

SpecSeal LCI Firestop Sealant, 10 oz - Advanced Fire Protection Features:

  • Features STI’s patented two-stage intumescent technology for effective fire protection.
  • Versatile for combustible and noncombustible penetrants, enhancing safety in diverse applications.
  • Remains stable in storage and maintains integrity without shrinking or separating after drying.
  • Compatible with various construction materials, ensuring broad usability.
  • Solvent-free formula, safe for use with plastic pipes and cable jackets.
  • Offered in gun-grade material, caulk tubes, sausages, and pails for flexible application.
  • Tested and suitable for through-penetration and construction joint configurations.
  • Ensures compatibility with CPVC piping, widening the range of applications.
  • Allows for sanding and painting to match different environments.
  • Included in over 500 UL Tested Systems, demonstrating its proven reliability.
  • Achieves UL® GreenGuard Gold Certification, endorsing its environmental safety.

View Product Data Sheet

View Safety Data Sheet



Color Red
Density/Weight per Gallon 12.3 lb/gal (1.47 kg/L)
Solids Content by Weight 80.0%
Solids Content by Volume 70.8%
Flame Spread 0*
Smoke Development 0*
Mold & Fungus Growth Rating (ASTM G21) 0
Movement Capabilities

33% Compression Only Class II

Coverage For more information on

product coverage see the following

documents for Linear Joint

& Penetration

pH 9
In Service Temperature Less than or equal to 185°F (85°C)
Storage Temperature 40°F (4°C) to 95°F (35°C)
Application Temperature 35°F (2°C) to 100°F (38°C)
STC Rating (ASTM E90-04/ASTM C919) 62 (Relates to Specific Construction)
VOC Content 26 g/L**
Expansion Begins 350°F (177°C)
Average Volume Shrinkage (ASTM C1241) 21.1%
Volume Expansion 10x Free Expansion
Shelf Life From Date of Manufacture 24 months

    Customer Reviews

    Be the first to write a review

    Subscribe To Our Newsletter

    Sign Up Today For Exclusive Offers, Sales, and New Products!

    Free Shipping

    When you spend $75+

    Give Us A Call

    (470) 485-4940

    Talk To Our Team

    Chat with us [Bottom Right]

    Fast Shipping

    Most orders shipped in 1 business day

    Compare products

    {"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

    Select first item to compare

    Select second item to compare

    Select third item to compare