We will be upgrading usg.com Aug. 16-17. During this time some features may not be available. Thank you for your patience.



    High quality floor underlayment primer and sealer in one. Ideal for priming surfaces and subfloors prior to application of poured underlayment. May also be used as a sealer for Durock™ Brand Self-Leveling Underlayment.

    Main Features

    Durock™ Brand Primer-Sealer is a high-solids sealant for priming highly porous concrete, precast concrete, wood subfloors and OSB (oriented strand board) prior to the installation of Durock™ Brand Self-Leveling Underlayments. Durock™ Brand Primer-Sealer:
    • Enhances the bond between the substrate and the underlayment
    • Is effective in the treatment of underlayments prior to application of water-based floor-covering adhesives
    • Has no adverse effect on floor-covering adhesives
    • Is mildew-resistant; does not stain finished
    • May also be used as a sealer for Durock™ Brand Self-Leveling Underlayments to enhance the bond between the underlayment and the floor-covering adhesive.


    • Guest Rooms and Suites
    • Multi-Family Residential and Condos
    • Open Plan Offices
    • Patient Rooms
    • Single-Family Residential

    Documents & Files

    Submittal Sheets & Specifications

    Catalogs & Brochures

    SDS, Certifications & Reports