Schluter PRIMER-U Universal Primer

Schluter Primer-U Universal Primer Schluter PRIMER-U is a ready-to-use universal primer used to enhance adhesion of mortars for hard-to-bond substrates such as gypsum underlayment, existing tile, terrazzo, steel (e.g. raised access panels), flooring adhesive residue, concrete with curing compounds, latex paint, and glass tile. Features Available in 1 quart, 1 gallon or 5 gallon pails Ideal for use with Schluter SET, ALL-SET, and FAST-SET thin-set mortars, and Schluter underlayments such as Schluter-DITRA and DITRA-HEAT Ready-to-use, single-coat application with roller or broom One-component, solvent-free, water-based acrylic formulation Low odor and zero-VOC Freeze/thaw stable 1 quart coverage: 50-135 ft2 (5-12.5 m2)* 1 gallon coverage: 150-300 ft2 (14-28 m2)* 5 gallon coverage: 750-1500 ft2 (70-135 m2)* It is a translucent orange liquid that dries to a slightly glossy film approximately 15-60 minutes after application Provides a strong bond to gypsum underlayment, concrete, existing tile, glass, plywood and OSB subfloor panels, terrazzo, steel, VCT flooring, well-bonded flooring adhesive residue, and latex paint **Not a moisture or vapor barrier Installation of a vapor retarder is recommended directly under all on or below grade concrete floors *Coverage will depend on the porosity of the substrate and method (i.e., brush, roller, sponge, etc.) of application. Limitations Not for use in exterior applications Not for use in submerged applications unless waterproofing is applied Vapor emissions requirements: ASTM F2170 – Internal relative humidity (RH) shall not exceed 90% and ASTM F1869 – Moisture vapor emission rate (MVER) shall not exceed 8 lbs/1000 sq ft/24 hours Common Questions What is Schluter PRIMER-U Universal Primer? A ready-to-use universal primer to enhance adhesion of mortars to hard-to-bond surfaces. How long does PRIMER-U Universal Primer take to dry The primer must be allowed to dry to the touch and not transfer to finger. Allow the coat to dry fully before applying thin-set mortar.