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 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 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

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.