Rectorseal 66640 10.3-Ounce Cartridge Metacaulk 1000 Intumescent Firestop Sealant System is rated for 1,2, and 3 hours in accordance with the ASTM E814, UL2079, and ULC-S115-95 test standards Excellent Freeze-Thaw Protected against mold growth VOC Compliant Complies to Required Enviormental Exposure Testing of Accelerated Aging and High Humidity as per UL 1479 Fire Test of through-penetration Fierstops