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