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A self-leveling underlayment used to smooth and repair an existing gypsum substrate that is otherwise unsuitable to receive new finish flooring. Use this product to install our metallic epoxy system!
ARDEX GS-4 is intended for use as a remedial material for distressed gypsum subfloors that have suffered degradation. It can also be used to smooth over building code-approved structurally sound wood, and over gypsum or wood subfloors that contain hydronic heating tubes or low voltage electrical in-floor heating systems. It can be installed from 1/4” up to virtually any thickness to achieve the desired flatness tolerance. It can be walked on after 3 hours, and floor covering can be installed as soon as the underlayment has dried sufficiently for the floor covering selected. The drying time is a function of temperature, humidity, and the thickness at which the material is applied.
22 sq. ft. per bag at 1/4"
11 sq. ft. per bag at 1/2"
Benefits:• A blend of high strength gypsum and Portland cements• Install any Spartan Epoxies coating system once surface has fully cured• Repairs existing gypsum and wood substrates above grade prior to the installation of new floor covering• Hardens and dries faster than other gypsum products• Needs no special curing• Easy to mix and apply• Install from 1/4” up to virtually any thickness, can be tapered to 1/16”• Recommended for use over structurally sound plywood, OSB, and strip wood flooring• Install floor covering in 2-3 days• Suitable for use with indoor hydronic and electric radiant heating systems• Use for interior floors only