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The 3M 7000046343 is a silver-colored caulk sealant packaged in a 5 oz tube, part of the 3M Series 2084 line. It is formulated to seal gaps, joints, and penetrations in HVAC ductwork, mechanical enclosures, and related assemblies where a durable, heat-resistant seal is required. The sealant is rated for a maximum operating temperature of 93 degrees C, making it suitable for applications where moderate heat exposure is expected. Licensed HVAC technicians and sheet metal contractors are the primary installers of this type of product.
This sealant is appropriate for use in residential and light commercial HVAC applications, including duct sealing, flashing, and mechanical system joints that require a flexible, long-lasting seal. The silver color allows the applied bead to blend with metallic duct surfaces and sheet metal components. It is dispensed from a standard 5 oz tube, making it well-suited for targeted application in tight spaces or at penetrations where precise bead placement is needed.
Designed as an OEM-style sealant for use in residential and light commercial HVAC duct sealing, sheet metal joint applications, and mechanical system penetrations where a silver, heat-resistant caulk is specified.
Application is typically performed by licensed HVAC technicians or sheet metal workers during duct installation or service. Ensure surfaces are clean, dry, and free of dust or grease before applying the sealant to achieve proper adhesion. Power down and de-energize any associated equipment before working in the area. Follow local mechanical codes and manufacturer surface preparation guidelines for best results.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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