Product Description

The STI SpecSeal® ES Elastomeric Firestop Sealant is a non-halogenated, latex-based elastomeric caulk designed for passive smoke and fire protection in construction joints.
It restores sound attenuation in rated assemblies and forms a flexible, water-resistant barrier against fire propagation.
Easy to apply with standard caulking equipment, it adheres to most construction surfaces and is LEED® v3, v4, v4.1 compliant for low VOC emissions.

Key Benefits

• Fire & Smoke Protection – Tested to UL2079 (ASTM E1966) and CAN/ULC S115 with ratings up to 4 hours.
• Elastomeric Flexibility – Accommodates ±25% joint movement with 500-cycle durability.
• Water-Based & Safe – Non-halogenated, no asbestos, solvents, or inorganic fibers.
• Acoustic Performance – Achieves STC 62 for sound-rated ceilings and partitions.
• Durable Shield – Water- and mold-resistant, will not re-emulsify after drying.
• Easy Installation – Caulk, trowel, or high-build application with smooth tooling.

Packaging

• Cartridges: 10.1 oz (300 ml), 29 oz (858 ml)
• Sausage Packs: 20 oz (592 ml)
• Pails: 5 gallon (19 L)
• Colors: Pale Blue, Red
• Shelf Life: 24 months from manufacture (unopened)