Premera HLT is a unique Moisture Vapor Barrier surface treatment for concrete consisting of specialized reactive chemicals in a colloidal silica matrix. When applied to concrete, Premera HLT penetrates to seal, densify, and harden cementitious surfaces by reacting with free calcium hydrates to form an insoluble, permanent barrier. This reaction creates a moisture vapor barrier within concrete—eliminating vapor transmission and solving hydrostatic pressure challenges. HLT also serves as a complementary pre-primer treatment for Premera’s sol-gel based products (e.g., FP1 Fusion Primer), enabling up to 25 lbs of moisture vapor resistance when used in combination and effectively mitigating adhesion issues caused by moisture vapor.

As a standalone treatment, HLT reduces porosity, prevents efflorescence, improves water resistance, and enhances overall surface properties. It is recommended for use under coatings, liners in immersion applications, adhered waterproofing membranes (including structures under hydrostatic pressure), and as a water-resistant sealer for micro-leaks in floors, walls, and basements.