U-51 Clear Aliphatic Moisture Cure

U-51 is a non-yellowing, single-component, aliphatic moisture-cure urethane (MCU) coating with excellent wear, stain resistance, and adhesion properties. When used as a topcoat over conventional coatings, U-51 provides excellent chemical resistance and dramatically improved abrasion resistance. U-51 is available in a gloss finish.

Uses and Benefits

U-51 is primarily used as a clear topcoat due to its outstanding UV, stain, mar, and abrasion resistance. It can be applied to floors and adheres well to many substrates with a surface contact angle of 50 or lower, including epoxy, concrete, gypsum, cement board, metals, vinyl, PVC, and fiberglass. It can also be applied directly to concrete as a sealer and topcoat.

Limitations

U-51 is designed to be applied at 3-4 mils as a topcoat on floors. It should be installed with an option of AO or Polycarb Aggregate to aid in application and provide anti-slip. Exceeding 5 mils or allowing puddling may cause foaming and adversely affect the cure and finish. Ideal application temperatures are between 60-90°F. Cooler temperatures and lower RH will increase cure times. Warmer temperatures and higher RH will decrease working and curing times.

Preparation

The preparation method for each project is determined by a full understanding of the substrate to be coated, the chemistry of the coating system being used, the coating system thickness, and numerous other factors. The coating installer should fully read and understand ICRI Guideline NO. 310.2R-2013 and OSHA 29 CFR 1926.1153 before starting preparatory work. The aim, of preparing a substrate for coating applications, is to roughen the surface, remove weak layers, contaminants, dirt, debris and present a solid, clean, dry substrate for the primer. Prior to applying U-51 do not solvent wipe as this may introduce moisture on the substrate. If unsure as to the level of preparation needed contact Polymer Nation at techservice@polymernation.com Note: Before applying U-51 Gloss, PN recommends thoroughly sanding the epoxy or polyaspartic basecoat with 120 grit sanding screens making sure that DFT of coating will hide scratch pattern of abrasive. Sweep and vacuum clean but do not solvent wipe.