BIOSTOP® 500+ Intumescent Firestop Sealant

500A water-based, flexible, highly intumescent sealant designed for use on metal, insulated and plastic pipes. It may be used for top of the wall construction joints, power and telephone cables, cable trays and bus ducts.

SDS: html / pdf
Product Data Sheet
SDS – French
List of Approved Systems

BIOSTOP® 500+ has passed UL 2079 for top of the wall applications with as little as 1/4 inch depth of caulk. The test assembly was also subjected to 500 cycles (as per ASTM E 1399) on a specially built machine that successfully demonstrated the product’s durability and movement characteristics. Complies to Required Environmental Exposure Testing of Accelerated Aging and High Humidity as per UL 1479 Fire Test of Through-Penetration Firestops. US Patent Number 6,207,085.

Sound Transmission Class (STC) Rating 62*
Tested in a UL 411 wall assembly/section to ASTM E90.

fbc-logo-150x86 c-ul-us1 fm-approved iwh-c-us2


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® pipe and fittings.

FBC, FlowGuard Gold®, BlazeMaster® and Corzan® are licensed trademarks of The Lubrizol Corporation

Product Code Size Qty per Case
66528 10.3 ounce cartridge 12
66493 30 ounce cartridge 12
66500 20.2 ounce 12
66499 5 gallon (Straight-sided plastic pail) 1