Manufacturer page.

Barritech NP is a fluid-applied membranes of fire-retardant synthetic polymer composition. Barritech NP is applied to exterior wall assemblies where it functions as an air barrier, vapor barrier and water resistive barrier. Barritech NP can be applied over concrete block, concrete, exterior gypsum sheathing, plywood, OSB and many other common building materials. The product is fully adhered to the substrate, flexible and rubber-like. Barritech NP is a single component, air-drying product applied by spray or roller at nominal 40 mils dry film thickness. The high film thickness and flexible, elastic properties enable Barritech NP to bridge cracks and seal around penetrations which creates a truly continuous, monolithic air, vapor, and water barrier.