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Clear silicone glazing sealant in a 10 oz cartridge

Dow Corning

Dow Corning DOWSIL 4045028 Silicone Glazing Sealant 10 oz Cartridge Clear

SKU CH-ACQ7-6K985

A clear silicone glazing sealant in a 10 oz cartridge, flexible and mildew resistant, meeting ASTM C920 Type S and TT-S standards with 470 percent elongation and a 45 minute working time

  • Clear silicone blends with glass and tile
  • Flexible bond handles 470 % elongation without cracking
  • One-day full cure at room temperature
  • Mildew and mold resistance keeps joints clean
  • Stable from -40 °F to 350 °F for year-round performance

Clear Silicone Glazing Sealant 10 oz

DOWSIL 4045028 is a one-part silicone sealant supplied in a 10 oz cartridge for glazing work on glass, metal, ceramic, fiberglass, plastic and porcelain. It cures to a flexible, mildew-resistant and mold-resistant bond that meets ASTM C920 Type S and federal specifications TT-S-001543A and TT-S-00230C Class A.

Verify substrate compatibility and cure schedule

Confirm the surfaces to be sealed are clean, dry and among the listed materials before ordering. The sealant provides a 45-minute working time and reaches full cure in one day, so plan the installation sequence accordingly. Service temperatures range from -40 °F to 350 °F.

Replaces generic glazing compounds

This product upgrades from basic latex or butyl glazing compounds when lasting flexibility, 470 percent elongation and proven mildew resistance are required. The jump is worth it for exterior glazing joints that must withstand wide temperature swings and prolonged weather exposure without cracking or losing adhesion.

How it compares

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

Price $8.99
Cheaper than about 80% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameDOWSIL

Questions about this item

Does the 10 oz cartridge include a caulking gun or nozzle, or must they be bought separately?

The cartridge is the sealant only; a compatible caulking gun and nozzle are not included and must be purchased separately.

How do I choose between the ASTM C920 Type S and TT-S-00230C Class A ratings for my glazing job?

Both standards apply to the same product; ASTM C920 Type S covers general construction sealants while TT-S-00230C Class A is a federal specification — select based on the requirement your project specifies.

What does the 470 percent elongation mean once the sealant cures in a window joint?

After the 1 day full cure, the sealant can stretch up to 470 percent of its original length, allowing the joint to handle thermal expansion and building movement without cracking.

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