Product Description

The STI SpecSeal® Fast Tack® Firestop Spray is an elastomeric, single-component advanced hybrid polymer coating designed to provide passive fire and smoke protection in construction joints.
Applied by airless spray, brush, or roller, it cures rapidly into a durable, flexible, water-resistant barrier that withstands fire, smoke, and combustion byproducts.
Ideal for curtain wall safing gaps, slab edges, floor-to-wall joints, and vertical joints, it is FM Approved and tested to ASTM and UL fire containment standards.

Key Benefits

• Fast Cure – Skins over quickly, tack-free in ~35 minutes, even below freezing.
• Reliable Fire Ratings – Tested to ASTM E2307, UL2079, ASTM E814, and CAN/ULC S115 with ratings up to 4 hours.
• Durable Shield – Forms a tough, flexible, water-resistant film that will not wash out.
• Safe & Eco-Friendly – Non-halogenated, asbestos-free, PCB-free, LEED® v3/v4/v4.1 compliant for low VOC.
• Acoustic Performance – Achieves STC 61 for sound-rated assemblies.
• Broad Application – Effective in perimeter joints, curtain wall systems, and vertical/horizontal joints.

Packaging

• Pack Sizes: 5 gallon (19 L) pails; Red or Limestone color
• Shelf Life: 12 months in unopened containers