Any tile installer knows that not all substrates are created equally and some varieties can pose adhesion challenges for thinset mortars. These substrates would benefit from enhanced bond strength to ensure a fault-free installation, which is best achieved by using a primer.

Schluter is now launching a brand new ready-to-use universal primer to enhance adhesion of mortars to hard-to-bond surfaces. Schluter-Primer-U is ideal for use in interior applications where increased bond strength is needed. A water-based, solvent-free acrylic formulation, Primer-U is low odor and zero VOC, and is freeze/thaw stable facilitating shipping and storage.

With Primer-U, thinsets and membranes, installers have a complete system solution from Schluter. Primer-U will allow tile installers to get a single source warranty for their tile installation systems, with guaranteed product compatibility.

Primer-U is ideal over various porous and non-porous substrates such as gypsum underlayment, existing tile, plywood or OSB, raised access panels and metal, and many more. Primer-U is easily applied in a single coat using a ³/₈-inch nap roller, a wide nylon bristle brush or even a garden sprayer. Application is the same regardless of the substrate, and it dries in as little as 15 minutes.

Since Primer-U is a water-based solution, simply clean any tools or spills with water while the primer is still wet. Primer-U is available in 1-gallon and 5-gallon buckets.