STI LLC Collars designed to stop smoke and flames traveling or transferring from pipes to rooms, ceilings, and flooring. These can seal cracks that are extremely small and keep your building secure and safe.
|Available Sizes||1.5" (38mm), 2" (51mm), 3" (76mm), 4" (102mm)|
|Shell Construction||Galvanized Steel|
|Expansion Begins||320°F (160°C)|
|Volume Expansion||32x to 64x (free expansion)|
|In Service Temperature||Less Than 120°F (49°C)|
|Shelf Life||No Limit|