Carlisle Hardcast 335501 Duct Adhesive 1 Gallon Red

Product Description

The Carlisle Hardcast 335501 is a solvent-based contact adhesive supplied in a 1-gallon pail and intended for use in HVAC duct fabrication and assembly. The product is identified by its red color, which is a common visual indicator in this adhesive category. Weighing approximately 8 pounds per pail, it is classified as a flammable liquid under UN1133, Packing Group II. HVAC technicians and sheet metal fabricators use this adhesive to bond duct liner, duct wrap, and related insulation materials during system assembly in both new construction and retrofit applications.

Insta-Grip 335501 is suited for residential and light commercial HVAC ductwork applications where a fast-gripping contact bond is required between duct board, fiberglass liner, or insulation and sheet metal substrates. It is applied in situations where quick tack and reliable adhesion reduce assembly time during duct fabrication. Installers working on forced-air heating and cooling systems commonly specify this product for interior liner bonding in air-handling duct assemblies.

Key Features

• Contact adhesive formula provides fast tack for duct liner and insulation bonding
• Supplied in a 1-gallon pail for job-site or shop use
• Red color allows visual identification during application
• Classified flammable liquid: UN1133, Packing Group II — requires proper handling and storage
• Net weight of 8 pounds per pail

Compatibility

Designed as an OEM-style duct adhesive for use with fiberglass duct liner, duct wrap insulation, and sheet metal duct assemblies in residential and commercial HVAC systems.

Installation Notes

This product must be handled by qualified HVAC technicians or sheet metal fabricators in accordance with applicable safety regulations. Because this adhesive is classified as a flammable liquid, all ignition sources must be eliminated from the work area during application and drying. Ensure adequate ventilation in enclosed spaces per local codes and the product safety data sheet. Keep the pail sealed when not in use and store away from heat sources.