Custom Building Products All-Purpose 25 lb. Patching Compound Underlayment for Patching/Repair

A fast-setting, polymer-modified, cement-based compound thatprovides a smooth finish on interior subfloors prior to the installationof a wide variety of floor coverings. Mix with water only to patch, level or skim coat concrete, OSB and plywood up to 1/2 in. (12 mm)thick per application. Install floor coverings in as little as 60-90 minutes.

• Smoothes the finishes on interior and exterior subfloors
• Patches and levels concrete and plywood to 1/2" (13 mm)