Elgen 440 Butyl Gasket

Description

Elgen 440 Butyl Gasket is a high-performance, non-curing gray butyl tape designed for use in 4-bolt duct connection systems. It provides superior adhesion and forms an air-tight seal on metal surfaces. UL 723 listed and VOC-free, this gasket is environmentally friendly, easy to apply, and suitable for long-term HVAC applications.

Specifications

Material: Gray butyl gasket tape extruded onto silicone release paper
Density: 14 lbs/gal (1.68 kg/L)
Compressive Strength: Not applicable
Service Temperature Range: -30°F to +180°F (-34°C to +82°C)
Thermal Conductivity: Not specified
Water Vapor Permeability: 0.75% weight gain after 7 days at 160°F (71°C)
Standard Sizes: 3/16″ x 5/8″ x 25′ rolls

Features

Superior Adhesion: Provides strong, consistent bonding to metal surfaces
Air-Tight Seal: Ideal for ductwork and HVAC sealing
Flexible & Durable: Maintains flexibility and adhesion in cold temperatures (down to -60°F)
Zero VOC: Solvent-free and environmentally friendly
Long Shelf Life: Minimum of 20 years under standard conditions
Meets LEED Standards: Contains a minimum of 30% recycled material

Certifications & Compliance

UL 723 Listed: R27308 – Flame Spread 0 / Smoke Density 1.8
FDA & USDA Compliant: Meets applicable safety standards
Test Standards: ASTM C-771, D-217, D-792, D-1833, C-765
Manufacturing Guarantee: Backed by Elgen Manufacturing against defective materials