SpecSeal® BLU/BLU2 Wrap Strips are versatile, high‑performance intumescent firestop wraps available in multiple sizes and configurations to address virtually any combustible pipe penetration. Offered in convenient 12‑ft rolls as well as pre‑sized individual strips, BLU/BLU2 Wrap Strips help minimize material waste and significantly speed up installation across a wide range of applications. When installed together with restraining steel, SpecSeal BLU/BLU2 Wrap Strips deliver exceptional expansion and fire‑resistance capability—capable of crushing and sealing non‑metallic piping up to 12 inches in diameter. This makes them a reliable, code‑compliant solution for protecting large‑format combustible penetrations in fire‑rated floors, walls, and floor/ceiling assemblies.
| Property | Value |
|---|---|
| Color | Blue |
| Mold & Fungus Growth Rating (ASTM G21) | 0 |
| ven Aging | No Change 140°F (60°C) |
| Humidity Exposure | No Change 60°C (98% R.H.) |
| UL Accelerating Aging | Pass |
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