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Black silicone sealant in a 10 oz cartridge labeled 737

Dow Corning

Dow Corning 99180484 Silicone Sealant 10 oz Cartridge Black 737

SKU CH-J97X-2WXE3

Black silicone sealant in a 10 oz cartridge withstands -75 °F to 300 °F, cures in one day and meets UL 94 HB

  • High-temperature resistance up to 300 °F
  • Remains flexible down to -75 °F
  • 300 % elongation handles joint movement
  • UL 94 HB flame rating for safety
  • 10 oz cartridge fits standard caulking guns

DOWSIL 737 Silicone Sealant 10 oz Cartridge

DOWSIL 737 is a high-temperature silicone sealant supplied in a 10 oz cartridge. It is formulated for HVAC, duct and electrical sealing tasks where flexible, durable bonds are required across diverse substrates.

Ready-to-use cartridge fits standard caulking guns

The cartridge format works with common hand or pneumatic guns, so no specialised dispensing equipment is needed. It adheres to concrete, fiberglass, glass, masonry, metal, plastic and wood, eliminating the need for multiple sealant types on a single job.

Replaces generic sealants lacking UL 94 HB rating

Choose DOWSIL 737 when a UL 94 HB listed product with 300 percent elongation and a service range from -75 to 300 degrees F is specified. It is not suited for applications that demand faster skin-over than the 14 minute working time or a full cure shorter than one day.

How it compares

Measured against everything we stock in Caulking & Sealing Supplies, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 67% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameDOWSIL

Questions about this item

How long does the DOWSIL 99180484 sealant remain workable after I cut the cartridge tip?

The working time is 14 minutes at room temperature before the material begins to skin over.

What temperature extremes can the cured bead withstand in an HVAC duct that runs all day?

The cured sealant performs continuously from -75 °F up to 300 °F without losing flexibility.

Which caulking gun do I need to dispense this 10 oz cartridge?

Any standard 10 oz cartridge gun fits the DOWSIL 99180484 tube.

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