Product Description

The STI SpecSeal® SSW BLU/BLU2 Intumescent Wrap Strip is a flexible, elastomeric firestop solution designed for combustible pipe penetrations in fire-rated floors, walls, and floor/ceiling assemblies. Supplied in convenient 12 ft rolls or pre-cut strips, the wrap expands up to 60× its original
volume when exposed to heat, forming a dense, insulating char that seals burning penetrants.

Key Benefits

• Fast Expansion – Rapidly closes burning penetrants for enhanced fire protection.
• High Volume Char – Expands 20× to 60× for reliable, tight seals.
• Flexible Installation – Suitable for tuck-in or restraining collar applications.
• Water-Resistant – Contains no water-soluble or hygroscopic ingredients.
• Versatile Use – Works with plastic pipes, pipe insulation, and complex penetrations.
• UL Certified – Tested to ASTM E814 (UL 1479) and CAN/ULC-S115, up to 4-hour ratings.

Packaging

• SSWBLU: 12’ × 2” × 3/16” roll, 2.87 lbs
• SSWBLU2: 12’ × 2” × 1/8” roll, 1.71 lbs
• Precut Strips: SSWBLU220 (2”), SSWBLU230 (3”), SSWBLU240 (4”)
• Restraining Collars: SSWRC (≤4”), WSC-8 (6–8”), WSC-12 (≥8”)
• Color: Blue
• Shelf Life: Unlimited when stored ≤130 °F (54 °C)