Owens Corning® FOAMULAR® & FOAMULAR® NGX™ CI-C Extruded Polystyrene (XPS) Rigid Foam Insulation are closed cell moisture-resistant durable rigid foam board intended for use under a variety of coatings including EIFS and stucco systems. FOAMULAR® & FOAMULAR® NGX™ CI-C are classified as a Type X/Type 2 product when tested in accordance with ASTM C578/CAN ULC S701 and provide stable thermal performance of R-5 per inch. Removal of the extruded skin surfaces provide smooth, flat, and parallel surfaces ideal as a base for coated surface materials.