Rectorseal 66408 Draft Stop Fire Block Caulk 10.1 Oz

Product Description

The RECTORSEAL 66408 is a red draft stop and fire block caulk formulated for sealing interior pipe and wire penetrations. Packaged in a standard 10.1 oz cartridge, it is designed to limit air movement and help contain fire and smoke spread through wall, floor, and ceiling openings. Compliance with ASTM E136 indicates the material meets non-combustibility test standards relevant to firestop and draft control applications. This caulk is a working material for plumbers, electricians, HVAC technicians, and general contractors performing rough-in or code-compliance sealing work.

This product is applied at interior penetrations where pipes, conduit, or wiring pass through framing members, drywall, or other building assemblies. It is well suited for residential and light commercial construction and renovation projects where building codes require draft stopping or firestopping at concealed wall and floor cavities. The red color aids inspection by making treated penetrations visually identifiable to inspectors and contractors during and after installation.

Key Features

• Meets ASTM E136 non-combustibility standard for fire block applications
• Red color provides visible identification of treated penetrations for inspection
• 10.1 oz cartridge fits standard caulk guns for fast application
• Seals both pipe and wire penetrations in a single product
• Intended for interior use at wall, floor, and ceiling assemblies

Compatibility

Designed as an OEM-style sealant replacement for interior draft stop and fire block applications at pipe and wire penetrations in residential and light commercial construction assemblies.

Installation Notes

Application is typically performed by licensed plumbers, electricians, or HVAC technicians as part of rough-in or final inspection prep. The penetration area should be clean and free of dust or debris before applying caulk. Apply product in accordance with local building codes, which may reference IBC or IRC requirements for firestopping and draft stopping at concealed spaces. Do not use as a substitute for listed firestop systems where through-penetration fire resistance ratings are required by code.

Technical Specifications

• Size: 10.1 oz
• Type: Sealant
• Weight: 1.25 pounds
• Color: Red
• Standard: ASTM E136

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: 66408