66640 Rectorseal 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 Environmental Exposure Testing of Accelerated Aging and High Humidity as per UL 1479 Fire Test of through-penetration Fierstops
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