4040 Concrete Primer SL

Flextile 4040 Concrete Primer SL is a high solids, acrylic primer that is used to prime concrete surfaces to be leveled with cementitious underlayments providing an improved adhesive bond.

For priming existing concrete surfaces when:

  • Repairing cracked, chipped or broken concrete.
  • Installing cementitious self-leveling underlayments, toppings, or other such products over concrete surfaces.
  • Filling honeycombs in new concrete.
  • Tuck pointing mortar.
  • Rubbing walls.


  • Improves bond strength.
  • Reduces porosity of concrete surface, improving mortar mix application characteristics.
  • Contributes to LEED points.