Insul-Therm’s INSUL-WRAP 850 is a semi-rigid fiberglass pipe or tank insulation integrating 850°F (454°C), nominal 3 pcf premium quality fiberglass with flexible facings. INSUL-WRAP 850 is manufactured with 1” to 4”wall thickness and is provided in roll form. The standard jacket is ASJ (all service jacket) or FSK (fiberglass reinforced kraft). Metal or PVC jacketing is also available. The premium quality fiberglass is laminated perpendicular to the facing to provide increased compressive strength. INSUL-WRAP 850 is excellent for application on pipe, vessels and tanks 6” diameter and larger.