Carlisle Hardcast CLK-RED High Temp Silicone Sealant 10.1 Oz

Product Description

The CARLISLE HARDCAST CLK-RED is a one-component, high-temperature silicone sealant packaged in a standard 10.1 oz cartridge. It delivers a flexible, watertight seal rated for continuous exposure from -62 degrees F to 500 degrees F, making it suitable for demanding HVAC, sheet metal, and mechanical applications where thermal cycling is a factor. The red color aids visual identification of treated joints. Licensed HVAC technicians, sheet metal workers, and plumbers use this sealant where conventional low-temp sealants would break down, particularly around flues, plenums, and high-heat duct connections.

CLK-RED is designed for sealing joints, seams, and penetrations on HVAC ductwork, equipment housings, and similar assemblies that experience elevated operating temperatures. Its resistance to rain, sleet, snow, and ozone makes it a reliable choice for outdoor mechanical equipment, rooftop units, and exposed duct transitions. The sealant retains its designed physical properties after prolonged environmental exposure, keeping seals weatherproof over the service life of the installation. It is dispensed with a standard caulk gun and cures to a flexible, durable bead.

Key Features

• Temperature range of -62 degrees F to 500 degrees F for high-heat HVAC and mechanical applications
• One-component formulation — no mixing required, ready to dispense from a standard 10.1 oz caulk cartridge
• Red color for easy joint identification and inspection
• Resistant to rain, sleet, snow, ozone, and temperature extremes
• Manufactured in the USA
• Retains design properties after extended outdoor and thermal exposure

Compatibility

Designed as an OEM-style sealant for high-temperature HVAC, sheet metal, and mechanical duct sealing applications requiring a one-component silicone rated to 500 degrees F.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal workers. De-energize and allow equipment to cool completely before applying sealant to any surface near heat sources or energized components. Surfaces should be clean, dry, and free of grease or debris prior to application. Note that this product is subject to California Proposition 65 warnings — consult the product safety data sheet before use in enclosed spaces.

Technical Specifications

• Type: High Temperature Silicone
• Color: Red
• Size: 10.1 oz
• Temperature Range: -62 degrees F to 500 degrees F
• Height: 9.45 inches
• Width: 1.75 inches
• Length: 1.75 inches
• Weight: 0.74 pounds
• Country of Origin: USA
• UPC: 638532809879
• Prop 65: Yes

Standard Information

• Brand: CARLISLE HARDCAST
• Manufacturer Part Number: CLK-RED