Click on each of these links to access UL Systems data for this product:

• Membrane Firestop-Drywall 1 & 2 Hr UL W-L-3230
• W-L-3220 Membrane Firestop 1/4 hr T rating

Unique Fire Stop Products UL Classified Systems with other putty:

• Hilti W-L-3220 (Membrane Firestop)