Product Description

The STI SpecSeal® LCI Intumescent Firestop Sealant is a versatile, economical
latex-based firestop compound with excellent caulking and high-build properties.
It expands up to 10× its original volume under heat, sealing penetrations against fire,
smoke, and gases. Designed for metallic and non-metallic pipes, insulated pipes, cables,
busways, structural steel, and HVAC ducts, it delivers reliable firestop protection for
a wide range of construction joints and penetrations:contentReference[oaicite:1]{index=1}.

Key Benefits

• Highly Intumescent – Expands up to 10× to seal combustible voids during fire.
• Reliable Fire Ratings – Tested to ASTM E814 (UL1479), ASTM E1966 (UL2079), and CAN/ULC-S115 for up to 4 hours.
• Durable & Water-Resistant – Will not re-emulsify after drying; minimal shrinkage.
• Excellent Smoke Seal – Provides acoustic rating STC 62 and effective smoke control.
• Safe & Eco-Friendly – Low VOC, non-halogenated, solvent-free, no asbestos or PCB.
• Easy to Install – Caulk, knife, or trowel application; paintable finish.

Packaging

• Cartridges: 10.1 oz (300 ml) and 29 oz (858 ml)
• Sausage Packs: 20 oz (592 ml)
• Pails: 5 gallon (19 L)
• Color: Red
• Shelf Life: 24 months in unopened packaging