Carlisle Hardcast 316522 Low Voc Primer 1 Gallon

Product Description

The CARLISLE HARDCAST 316522 is a low-VOC primer formulated for use in HVAC duct sealing and sheet metal applications. This single-gallon unit is applied before sealant or mastic to promote adhesion and ensure a durable, long-lasting bond on metal surfaces. Its low volatile organic compound (VOC) formula makes it suitable for use in environments where air quality and regulatory compliance are a concern. HVAC technicians and sheet metal contractors typically apply this primer as part of a two-step duct sealing system, preparing the substrate before the topcoat sealant is installed.

This primer is used in residential and light commercial HVAC duct systems where proper surface prep is required prior to mastic or sealant application. It is well-suited for use on galvanized steel, sheet metal fittings, and duct board surfaces. The 1-gallon container provides a practical volume for field use across multiple connections or duct runs in a single installation job.

Key Features

• Low-VOC formula supports compliance with air quality regulations in restricted-use environments
• Promotes adhesion between substrate and duct sealant or mastic topcoat
• 1-gallon container suited for multi-connection field applications
• Designed for use on metal duct surfaces including galvanized steel and sheet metal
• Net weight of 8.33 pounds per gallon

Compatibility

Designed as a preparatory primer for use with duct sealants and mastics in residential and light commercial HVAC duct systems. No specific compatible part numbers or system families were stated in the available product data.

Installation Notes

This primer is typically applied by licensed HVAC technicians or sheet metal contractors as part of a duct sealing process. Power down the air handling system before working on duct connections. Apply the primer to clean, dry, and dust-free surfaces and allow adequate dry time before applying the finish sealant or mastic per the manufacturer instructions. Work in a well-ventilated area and follow local air quality and safety regulations when handling primer products.

Technical Specifications

• Container Size: 1 Gallon
• Weight: 8.33 pounds
• VOC Content: Low VOC
• Order Increment: 1

Standard Information

• Brand: CARLISLE HARDCAST
• Manufacturer Part Number: 316522