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.
