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Smith's Original and Genuine (CPES) Clear Penetrating Epoxy Sealer

  • Applications: Primer / Sealer for Wood
  • Penetrates and Replaces Rot and Moisture
  • Ratio: 1:1, Formula: Cold Weather Formula / Size: (2) Pint
  • Item #: 
    Smith & Co.
    Model #: 


    Shipping Weight: 
    2.60 Lbs.
    Closeout Price:
    Status:  null In Stock

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    Sales of all Closeout items are final.

    Warning This product ships ground only

    Smith's Original and Genuine Clear Penetrating Epoxy Sealer works as a great Primer and also Penetrates and Replaces Rot and Moisture in Wood

    Smith's Original and Genuine Clear Penetrating Epoxy Sealer™ (CPES™) bonds paint or varnish to wood with a flexible epoxy glue made largely from the natural resins of wood itself. It allows the wood to "breathe" so excess moisture does not accumulate behind coatings or fillers, helping the wood to resist paint-failure and ultimately rot. Where moderate deterioration is present, it selectively penetrates the deteriorated parts of wood. In other words, it finds the rot. It is available in a Warm Weather Formula for general-purpose outside use, and a Cold-Weather Formula for cold-weather- or indoor-use; all versions have a simple fifty-fifty mixing ratio, and a working time of many hours


    • Smith's Clear Penetrating Epoxy Sealer™ (CPES™) consists of a tough, flexible resin system in a solvent blend which dissolves the sap, oil and moisture found in wood
    • The resin system is derived from natural wood resin and develops a chemical adhesive bond to the wood fibers themselves
    • The wood is strengthened while allowing normal expansion and contraction with changes in temperature and humidity
    • When repairing wood that has mild dry rot, the CPES will migrate along the abnormal porosity, which dry rot fungus creates within the wood, as long as it continues to be fed in
    • Impregnation of wood with CPES changes the cellulose of wood (which fungi and bacteria find tasty and easily digestible) into epoxy-impregnated cellulose which resists further attack by fungi and bacteria while reinforcing the wood, accomplishing restoration
    • Paint or varnish will last longer because the paint has a strongly attached, chemically compatible surface to bond onto
    • The long working time (pot life) of these products mean they will retain their penetrating and moisture-dissolving ability for more time
      • Read and follow application instructions
    • Keep rain or dew away from areas being treated with CPES until solvents have evaporated out of the wood
    • This will take at least a day and may take a week or more, depending on the extent of deterioration, how deeply the CPES soaked in and the temperatures day and night
    • Application may be by brush, roller or immersion
      • Spraying is not recommended as a portion of the solvent component will evaporate in transit, and it is important that the product be applied to the wood in the same formulation furnished originally
      • When applying by roller on a vertical surface, hold the roller only horizontally and slowly roll only upwards
      • When treating rot inside sound wood
        • Drill a hole that intersects the rot
        • Glue a funnel in the hole
        • Use Smith's Cold Weather Formula to impregnate the region
        • Allow sufficient time for solvents to diffuse and evaporate out of the wood before applying fillers or glues
        • Removing paint from all sides of wood to be treated speeds solvent evaporation, as does moving air
      • CPES is also a consolidant for old, crumbly concrete or mortar between bricks, and is an essential component of effective osmosis blister treatment on fiberglass boats
      • Smith's Epoxy Cleanup Solvent will clean up any epoxy product before it cures
        • Once cured, no cleanup solvent is effective

    Available Formulas

    • Smith's Warm Weather Formula of Smith's Clear Penetrating Epoxy Sealer (CPES) was designed to be used in the temperature range of 66° F and higher
    • Pot Life:
      • 86° F = 4 hr
      • 68° F = 8 hr
      • 50° F = 8 days
    • Full Cure:
      • 86° F = 2 days
      • 68° F = 4 days
      • 50° F = 8 days
    • Smith's Cold Weather Formula of Smith's Clear Penetrating Epoxy Sealer (CPES) was designed to be used in the temperature range of 28° F - 65° F
      • Nighttime temperatures are usually much less than daytime temperatures and so night provides less progress towards full cure than day
      • This makes Smith's Cold Weather Formula valuable when the daytime temperatures are in the 50° F ~ 60° F range and/or night temperatures are in the 30° F ~ 40° F range
      • Pot Life:
        • 86° F = Use Warm Weather Formula
        • 68° F = 2 hr
        • 50° F = 4 hr
        • 32° F = 8 hr
      • Full Cure:
        • 86° F = Use Warm Weather Formula
        • 68° F = 2 days
        • 50° F = 2 days
        • 32° F = 4 days


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