66640 - Rectorseal - METACAULK 1000, 10.3 .oz - 12PK

The RectorSeal 66640 - Metacaulk 1000 (10.3 oz Cartridge, 12PK) is a high-performance, intumescent firestop sealant designed for sealing construction joints and through-penetrations in commercial and industrial buildings.

🔥 Product Overview:

• SKU: 66640
• Size: 10.3 oz per cartridge
• Pack Size: 12 cartridges per case
• Form: Paste
• Color: Red
• Application: Use with a standard caulking gun; no mixing or special tools required 

🧪 Features:

• Fire-Rated: Certified for 1, 2, 3, and 4-hour ratings per ASTM E814, UL 1479, UL 2079, and CAN/ULC-S115 standards
• Highly Intumescent: Expands when exposed to heat to block flames, smoke, and gases.
• Flexible & Non-Sag: Cures to an elastomeric seal suitable for dynamic motion and vibration.
• Mold Resistant: Protected in both wet and dry stages with biocides.
• VOC Compliant: Safe for indoor use and paintable.