Carlisle Hardcast CLK-ALU Aluminum Silicone Sealant 10.1 Oz

Product Description

The CARLISLE HARDCAST CLK-ALU is a 100% silicone, one-component RTV sealant formulated for industrial sealing and adhesive applications. It delivers a non-slump, paste-like consistency that stays in place during application on vertical and overhead surfaces. The sealant cures at room temperature through moisture exposure in the air, producing a durable, flexible silicone rubber bond. Packaged in a standard 10.1 oz cartridge, it is well-suited for HVAC, sheet metal, and general industrial sealing tasks where a weather-resistant, flexible seal is required. HVAC technicians and sheet metal mechanics are the primary installers.

This sealant is designed for a wide variety of industrial sealing and adhesive applications including duct joints, flashing, penetration seals, and equipment housings. Its aluminum-compatible formulation makes it a practical choice for metal duct assemblies, aluminum flashing, and exterior metal panel joints in both residential and light commercial environments. The flexible cure means it maintains integrity through thermal cycling common in HVAC systems.

Key Features

• 100% silicone, one-component RTV formula — no mixing required
• Non-slump, paste-like consistency holds position on vertical and overhead surfaces
• Room-temperature cure via atmospheric moisture — no heat or UV required
• Produces a durable, flexible silicone rubber seal after cure
• Standard 10.1 oz cartridge fits common caulk guns
• Suitable for a wide range of industrial sealing and adhesive applications

Compatibility

Designed for general industrial sealing and adhesive applications including aluminum substrates, metal duct assemblies, and sheet metal components typical in HVAC and light commercial construction.

Installation Notes

Apply using a standard cartridge caulk gun. Surfaces should be clean, dry, and free of grease, dust, or loose material before application. Allow adequate cure time based on ambient humidity and temperature before pressurizing or stressing the sealed joint. Follow local mechanical and building codes when sealing duct systems or penetrations.

Technical Specifications

• Net Fill: 10.1 oz
• Length: 1.75 inches
• Width: 1.75 inches
• Height: 9.45 inches
• Weight: 0.74 pounds
• Formula Type: One-component RTV silicone
• Consistency: Non-slump paste
• Cure Method: Moisture cure at room temperature

Standard Information

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