J & S Supply is a recognized distributor of Dow STYROFOAM Brand Cavitymate Extruded Polystyrene,  Cavitymate Plus & Cavitymate Ultra serving New York, NYC, Brooklyn, Queens, Long Island, Westchester, New Jersey, and Connecticut. Cavitymate,  Cavitymate Plus & Cavitymate Ultra are extruded polystyrene foam insulation boards designed to be moisture, resistant, durable and lightweight making them perfect for use in wet cavity wall environments.

Dow Cavitymate & Cavitymate Plus are available in thicknesses ranging from 1″ to 3″ and R-values of 5 to 15. Cavitymate Ultra is available in thicknesses ranging from 1.75″ to 3″ with R-values of 10 to 16.8. At 16″ x 96″ they fit snugly between wall ties. The products closed-cell structure provides exceptional long-term thermal performance and moisture control. Cavitymate Ultra’s R-value of 5.6 per inch is the highest of all extruded polystyrene foam insulation products.

Dow STYROFOAM Brand Cavitymate Extruded Polystyrene,  Cavitymate Plus & Cavitymate Ultra are all hydrochlorofluorocarbon free with zero ozone-depletion are reusable in many applications.

Dow STYROFOAM Brand Cavitymate, Cavitymate Plus & Cavitymate Ultra
Cavitymate Data Sheet
Cavitymate Plus Data Sheet
Cavitymate Ultra Data Sheet

Our prime location in Long Island City is close to every major thoroughfare in the Metropolitan New York, New Jersey, and Connecticut area, ensuring our fleet of specialized equipment can deliver fast.


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