Entropy Super Sap Clear Laminating Fast Hardener
Entropy Resins Entropy Resins
  • Entropy Super Sap Clear Laminating Fast Hardener
  • Entropy Super Sap Clear Laminating Fast Hardener snow
  • Entropy Super Sap Bio-based Epoxy Fast Hardener

Entropy Super Sap CLF Clear Fast Hardener

Entropy CLF Clear Fast Hardener is used when faster curing of biobased Entropy CLR Clear Resin or Entropy BRT White Resin is desired or when working in colder temperatures. The CLR Clear Epoxy system is water-clear; the BRT system is white. Both are low-viscosity, UV-stable liquid epoxies for composites, coatings & adhesive applications, and are optimized for hand lay-up, room temperature processes, or infusion laminating of wood, fibers, glass, carbon, or Kevlar. All Super Sap resins exhibit excellent air release, low color, and exceptional color and UV stability.

Use with Super Sap CLR Clear Resin or bright white BRT Resin for medium pot life & low exotherm lamination & coatings. CLR and BRT resins & CLS/CLF/CLX hardeners have a biocontent greater than 30% & can be modified with epoxy compatible colorants & fillers.

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$21.30 / ea
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Tech Spec Product Info User Generated Content

Features of Super Sap CLF Clear Fast Hardener Combined with CLR Resin or BRT Resin

  • Fast hardener for Entropy's Super Sap high-performance, CLR clear epoxy coating, or bright white BRT epoxy resin.
  • Green epoxy resin with fast room temperature cure.
  • Excellent composite laminating resin ideal for hand layup and vacuum bagging.
  • Great for high-color applications requiring a clear, non-yellowing resin system.
  • UV-stable formula with relatively low viscosity.
  • First USDA BioPreferred Certified liquid epoxy resin system.
  • CLF requires corresponding size of Super Sap CLR Epoxy Resin or BRT Epoxy Resin for use (2:1 ratio). See chart below.

Super Sap CLR/CLF Resin System Best Uses

  • Surfboards, SUPs (stand up paddleboards), handplanes
  • Adhesives and sealants
  • Fiberglass boat repair
  • Clear coating applications
  • Natural fiber composites
  • Carbon fiber composites
  • Fiberglass composites

Super Sap BRT/CLF Resin System Best Uses

  • White surfboards
  • Bright white cosmetic marine laminating applications


Specifications & Mechanical Data  Super Sap CLR/CLF Admixed  Super Sap BRT/CLF Admixed 
Color  Clear  White 
Mix Ratio by Volume  2:1 (resin:hardener)  2:1 (resin:hardener)  
Mix Ratio by Weight  100:47 (resin:hardener)  100:47 (resin:hardener) 
Mixed Viscosity @ 77°F  725 cPs  725 cPs 
Pot Life @ 77°F  21 minutes  21 minutes 
Tack Free Time @ 77°F  4 hours  4 hours 
Ideal Working Temperature Range  Optimal - 70-85°F; Extended - 60-95°F  Optimal - 70-85°F; Extended - 60-95°F 
Ideal Working Humidity Range  Optimal - 0-50%; Extended - 0-95%  Optimal - 0-50%; Extended - 0-95% 
Recommended Full Cure  7 days @ 77°F  7 days @ 77°F 
Tensile Strength  9,500 psi  9,500 psi 
Elongation  5%  5% 
Flexural Strength  13,500 psi  13,500 psi 
Compression Strength  11,330 psi  11,330 psi 
Tg Ultimate  149°F  149°F 
Hardness, Shore D  70-80  70-80 
Super Sap CLR or BRT Epoxy Resin Quantity  Super Sap CLF Hardener Quantity  Mixed Quantity 
32 oz.  16 oz. hardener  48 oz. 
1/2 gallon resin  1 qt. hardener  3 qt. 
1 gallon resin  1/2 gallon hardener  1.5 gallons 
2 gallons resin  1 gallon hardener  3 gallons 
5 gallons resin  2.5 gallons hardener  7.5 gallons 
Safety and Handling Information

Despite the natural derivation of Entropy resin products, exposure to these materials represents hazards typical of all epoxy resins. Exposure should be minimized and avoided through the use of proper personal protective clothing & equipment, and appropriate manufacturing controls. All persons who use, store, or transport these materials should understand proper handling precautions and recommendations, as stated in the SDS (safety data sheets).

BRAND: Entropy Resins
Material: Epoxy
Rate Of Cure: Fast
Type: Hardener
4.3 3

good clear epoxy option


The CLX hardener would be good to have. i mix the two to adjust cure times.


Portland Maine


Entropy super sap CLF clear Fast Hardner


this product is so easy to use, I also used the pump for the bottles and they make it so easy to measure out the proper mix. I am building wooden bait tanks to hold bait fish, I built the out of 3/4" plywood and then used Entropy CLR Clear Resin with the slow hardener. This gives you lots of time to lay your fiberglass matt down and mix more if you are running short when you add a coat to your matt. Once you paint your matt with using a short bristle brush, use a plastic spreader board to smooth out wrinkles in the matt. It will dry to a clear finish. And it is paintable.

Darrell the bait tank builder

Burnsville West Virginia


Excellent, so far....


Super Sap CL/F is an excellent system, as far as I have tested it for strength and workability in composite laminates. The only testing left to do takes time - we all know how epoxies can become brittle and weaken, especially in marine applications. It's great for now, and for the final results, we wait....


Long Island, NY


Entropy Super Sap CLF Clear Fast Hardener



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