Made of recycled resin, EcoStud furring product is designed for furring out block or poured concrete walls. It can be used with any type of insulation, and provides a thermal break when attached directly to exterior concrete block. Use with spray-applied, high-density, closed-cell foam to provide a continuous moisture barrier and insulation package. The product will not rot, rust, or mold, and is termite resistant. Superior Polymer. 877-586-5543.