66616 - Rectorseal - 10.3 OZ METACAULK 350I - 12PK

The RectorSeal 66616 - Metacaulk 350I (10.3 oz Cartridge, 12PK) is a general-purpose, intumescent firestop sealant designed for use in construction joints and penetrations in fire-rated walls and floors.

🔥 Product Overview:

• SKU: 66616
• Size: 10.3 oz per cartridge
• Pack Size: 12 cartridges per case
• Color: Red
• Form: Water-based, non-sag caulking grade

🧪 Features:

• Fire-Rated: Certified for 1, 2, and 3 hours per ASTM E814 (UL 1479), UL 2079, and ULC-S115 standards
• Highly Intumescent: Expands when exposed to heat to block fire, smoke, hot gases, and water
• Flexible & Elastomeric: Cures to a seal that accommodates dynamic movement
• VOC Compliant: Safe for indoor use
• STC Rating: 53 (acoustical sealant)
• Application: Can be applied with a standard caulking gun; no mixing required
• Shelf Life: Minimum 3 years
• Use Cases: Ideal for gypsum wallboard, concrete block walls, steel deck floor/ceiling assemblies, and areas with vibration or movement