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Clear silicone sealant in a 10 oz cartridge

Dow Corning

Dow Corning DOWSIL 99180483 10 oz Clear Silicone Sealant Cartridge

SKU CH-GFCK-M4NB4

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

  • Clear sealant blends invisibly on glass and metal
  • Flexible bond handles movement across concrete, wood and plastic
  • High-temperature resistance up to 300 °F for HVAC and electrical use
  • Low 53 g/L VOC content meets indoor air-quality needs
  • UL 94 HB rated for flame-retardant safety

DOWSIL 99180483 Clear Silicone Sealant

This 10 oz cartridge supplies a high-temperature silicone sealant for HVAC, duct and electrical work. It bonds to concrete, fiberglass, glass, masonry, metal, plastic and wood. The formula remains flexible after curing and meets UL 94 HB. Professionals and DIY users get a reliable, clear joint for indoor or outdoor projects.

Thermal stability and cure profile

The sealant performs from -75 °F up to 300 °F and reaches full cure in one day. Working time is 14 minutes, allowing tooling before skin formation. VOC content is 53 g/L by weight. Elongation reaches 300 percent, so the joint absorbs movement without cracking. No special ventilation or heating equipment is required during normal application.

Upgrading from basic caulks

Acrylic or latex caulks that shrink, harden or fail above moderate heat are replaced by this silicone. The jump is worth it when the joint sees wide temperature swings, UV exposure or constant vibration. It is not suited for structural glazing, continuous water immersion or surfaces that require a paintable finish within hours.

How it compares

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

Price $10.99
Cheaper than about 70% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameDOWSIL

Questions about this item

How do I apply this 10 oz cartridge sealant, and what step do people often miss?

Cut the nozzle, load the cartridge into a caulking gun, and apply within the 14 min working time; the step often missed is tooling the bead immediately before it skins over to ensure adhesion.

Will this cured silicone need any maintenance or replacement later?

The cured sealant remains flexible at 300 % elongation and resists temperatures from -75 °F to 300 °F, so it typically lasts the life of the joint unless the substrate moves beyond that elongation limit.

What is the first limit I hit if I run this sealant at high temperature continuously?

The maximum performance temperature is 300 °F; above that the silicone can degrade and lose its sealing properties.

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