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ASTM C-309

Standard Specifications for Liquid Membrane Forming Curing Compounds and Curing and Sealing Compounds.

The most common concrete curing specification in use today. States that the compound must form a membrane and have moisture retention properties equalling 0.55 Kg/M2 in 72 hours when applied at 200 Ft.2 per gallon. Compounds are classified according to type and class.

TYPE refers to color only

  • Type 1: clear
  • Type ID: clear with fugitive dye
  • Type II: white pigmented

Class refers to the kind of resin solids used in the compound

  • Class A unrestricted: This is generally accepted as meaning nonresins such as waxes.
  • Class B restricted: Restricted to all resin materials, namely acrylics, acrylic blends, epoxies and all other blends.

If a curing compound is said to be Class B, it is also considered to be an A.

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Silencure, Polyseal, Traz, Aquanil, Spall Guard, Chemisil, EZ Strip Cure, SafeSeal, Spray Film, DuraShield SRT, Slip Stop and Exposee are trademarks of ChemMasters, Inc. ChemMasters and Safe-Cure are registered trademarks of ChemMasters, Inc.


300 Edwards Street, Madison, Ohio 44057
Phone 440.428.2105 - 800.486.7866
Fax 440.428.7091
 
 
© 2019 ChemMasters, Inc.
Silencure, Polyseal, Traz, Aquanil, Spall Guard, Chemisil, EZ Strip Cure, SafeSeal, Spray Film, DuraShield SRT, Slip Stop and Exposee are trademarks of ChemMasters, Inc. ChemMasters and Safe-Cure are registered trademarks of ChemMasters, Inc.
300 Edwards Street, Madison, Ohio 44057
Phone 440.428.2105 - 800.486.7866
Fax 440.428.7091