P-99 MVS Primer

P-99 is a state of the art, Bisphenol F epoxy, Moisture Vapor Suppression (MVS) coating. As a Bis F, it has higher functionality than Bis A epoxies, providing better chemical resistance to caustics and acids. This is critical when combating high alkalinity at the concrete/coating interface. P-99, when properly installed, creates a tight film that tenaciously bonds to concrete. This highly crosslinked film reduces the amount of moisture vapor that can pass from the concrete through the P-99. Independent testing, performed by CTL Labs, shows ASTM E96 test results of .074 grains per hour, per square feet, per 1 inch of mercury. This extremely low perm rating results in P-99 being classified as a Class 1 vapor retarder. P-99 comes in standard and fast set versions. Ask your P-99 supplier for the CTL test results and always demand third party testing when comparing MVS product performance between manufactures!

Uses and Benefits

Primer-Used when concrete testing, per ASTM F2170, shows average RH readings above 75% or when moisture vapor emissions are suspected, and an additional level of moisture transmission protection is desired. When applied seamlessly at 16 mils over a concrete surface profile (CSP) of 2 or 3, P-99 will mitigate moisture vapor transmission (MVT) to less than .1 perms as shown in independent testing. Independent testing shows that broadcasting flake into P-99 results in a Class 2 Vapor retarder or > .1 and

Limitations

Verify that substrate temperature is above 5 degrees of dewpoint during application and cure of material to avoid a potential amine blush. Follow Technical Data below.

Preparation

For guaranteed performance follow all steps found in ASTM F3010. Patch all holes, cracks and non-moving joints using SP-15 prior to coating application. Understanding of osmotic, capillary and hydrostatic pressures with the potential of alkaline hydrolysis (which can erode the bond strength) is critical to successful evaluation, preparation and installation. Osmotic, capillary and hydrostatic pressures have been measured in excess of 3,000 p.s.i. which is well above the tensile strength of concrete. Polymer Nation encourages its customers to review its presentation called Understanding Moisture Vapor Suppression available where P-99 is sold. To receive a MVS warranty contact Polymer Nation techservice@polymernation.com prior to the start of project. Only written warrantees will be honored for labor and material coverage.