MAS Slow Hardener, Non-Blush Formula

  • $29.00
  • Save $10.95

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Product Overview:

MAS 2:1 Non-Blushing Slow Epoxy Hardener is designed for use with both MAS Low-Viscosity Epoxy Resin and FLAG Medium Viscosity Epoxy Resin and can be applied in a wide range of conditions where increased cure and working time is desired.

Special features exhibited by this product include blush free surfaces, good ultraviolet stability, smooth finishes in cured films, excellent osmotic (moisture) resistance and the ability to cure under high humidity.

MAS Slow Hardener is highly recommended for use when coating or laminating large surfaces. The low viscosity is great for use with MAS LV Epoxy Resin for fast wet-out of reinforcing fabrics.

Cures blush free and eliminates the need for time consuming wash downs during on-going laminations and repetitive build coats.

Features & Benefits:

  • 30 minute pot-life @ 70°F
  • 4 hour working time @ 70°F
  • Low viscosity (200-250 poise)
  • Non-blushing formula
  • Smooth finishes in resultant cured films
  • Excellent osmotic (moisture) resistance
  • Will cure under high humidity conditions
  • Highly recommended for use when coating or laminating large surfaces
  • Great for use with MAS Low-Viscosity Epoxy Resin for fast wet-out of reinforcing fabrics
  • Available in pint, quarts and half-gallons

    Application Suggestions:

    • Extended gel time for controlled working & cure times
    • Recommend for use with MAS Low-Viscosity Epoxy Resin for large surface coating & laminating



    When simply coating, sealing or saturating wood with epoxy, do not add thickening powders.

    For laminating applications, consider MAS Low-Viscosity LV Epoxy Resin and MAS Non-Blushing Slow Hardener.

    For filling applications, consider MAS Flag Medium Epoxy Resin.

    It is important to mix epoxy and hardener thoroughly before adding thickener.

    Often two fillers used in conjunction are more effective than any single filler used alone; this can be attributed to the synergistic effects found when two different particle sizes are blended together.

    When filling gaps or making a fillet (pronounced "fill-its") add sufficient wood flour to make a peanut butter consistency. 

    Colloidal Silica (aka Cab-O-Sil) and other white fillers may be added to make the wood flour paste match the color of the plywood exactly. Adding some Phenolic Micro Balloons or Colloidal Silica (no more than 30 percent by volume) has the added benefit of making wood flour fillets smoother and easier to spread.

    When using epoxy as an adhesive (i.e., bonding wood to wood), add enough silica powder to the resin-hardener mix to bring it to the consistency of mayonnaise or jam.

    Data Sheets:

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