COVID-19: HoldRite is taking additional measures to serve customers and protect employees. Read more here.

Large Diameter Sleeves

Cast-in-place UL Listed firestop sleeve device for 8 in. to 12 in. nominal plastic, metallic or insulated metallic penetrants.

Large Diameter Hollow Sleeves

Cast-in-place hollow UL Listed firestop sleeve device for penetrants up to 12 in.

“FBC™ System Compatible indicates that this product has been tested, and is monitored on an ongoing basis, to assure its chemical compatibility with FlowGuard Gold®, BlazeMaster® and Corzan® piping systems and products made with TempRite® Technology.” “The FBC System Compatible Logo, FBC™, FlowGuard Gold®, BlazeMaster®, Corzan®, and TempRite® are trademarks of Lubrizol Advanced Materials, Inc. or its affiliates.”