Primer T

All-Purpose Primer for Self-Leveling Underlayments 
Primer T is a low-VOC, water-based acrylic primer that enhances the performance and adhesion of self-leveling underlayments (SLUs) on nonabsorbent surfaces such as ceramic tile, vinyl composition tile (VCT), epoxy moisture barriers and adhesive residue, as well as profiled, absorbent surfaces. Suitable for a wide variety of substrates, Primer T combines excellent versatility with an easy, low-odor application.   

Technical Data Sheet

Safety Data Sheet


Should I use Primer T full-strength?

When using MAPEI's Primer T over plywood, cement board, smooth concrete, or existing flooring such as ceramic tile, porcelain tile, natural stone or VCT, apply Primer T full-strength (do not add any water). Primer T should also be used full-strength between multiple layers of MAPEI's Self-Leveler Plus underlayment.

When should I dilute Primer T?

When using Primer T over porous substrates such as wall patching compound, drywall, existing gypsum-based underlayments and rough concrete, dilute Primer T with water. When diluting MAPEI's Primer T with water, mix 2 parts cool water to 1 part Primer T.

How do I apply Primer T?

Apply MAPEI's Primer T with a 3/8" (10 mm) nap paint roller.