Lennox 18D52 is a high-performance firestop sealant supplied under the BOSS 816+ (part number 81610) branding. This intumescent sealant is designed for firestopping applications where penetration sealing is required to help maintain fire-rated assemblies. It expands when exposed to high temperatures, helping to block the spread of fire, smoke, and toxic gases through openings.

Manufactured by BOSS Products and distributed by Lennox, this sealant meets the needs of HVAC, mechanical, and general construction professionals working in fire-rated environments.

Product Overview
The BOSS 816+ Intumescent Firestop Sealant is a ready-to-use, one-component acrylic latex sealant formulated for sealing penetrations around pipes, ducts, conduits, and other services that pass through fire-rated walls and floors. When exposed to fire, the sealant expands significantly, helping to close gaps and slow the spread of flames and smoke.

This red, paintable sealant applies easily with a standard caulking gun and cleans up with water before curing. It is commonly used in commercial, residential, and light industrial applications where fire code compliance is required.

 

Specifications:

Manufacturer: BOSS Products
BOSS Part Number: 81610
Lennox Catalog Number: 18D52
Product Type: Intumescent firestop sealant
Color: Red
Container Size: 10.1 oz cartridge
Base: Acrylic latex, intumescent
Application Method: Standard caulking gun
Cleanup: Water (uncured)
Paintable: Yes (after curing)
Typical Uses: Firestopping around pipes, ducts, conduits, and penetrations in fire-rated assemblies