MEKP Hardener

4.7 star rating

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  • Item
  • Description
  • Price
  • Qty
  • 69-A
  • 69-A
    1 oz
  • $3.95
  • 69-D
  • 69-D
    Gallon (8 lbs)
  • $69.95
  • 69-E
  • 69-E
    Case (4 Gallons)
  • $219.95


Industry Standard Catalyst

MEKP (Methyl Ethyl Ketone Peroxide) is a catalyst used in the composites industry for polyester and vinyl ester resins and gel coats. It reacts with the resin to turn it from a liquid to a solid (cure it). It is used in varying ratios, generally between 1%-3%, depending on the product being used.

Each resin product is available as a kit with a sufficient of amount of MEKP. However, MEKP may be purchased individually, as shown here.

MEKP is an organic peroxide and should always be handled with care, using the appropriate Personal Protective Equipment.



MEKP Hardener 1 oz. (#69-A) unit can be shipped via standard ground service without hazard charges within the 48 contiguous United States. MEKP Hardener gallon (#69-D) and case (#69-E) units are considered hazardous (flammable) and will be subject to a hazard charge if shipped by standard ground. MEKP 1 oz. (#69-A) unit will be subject to a hazard charge if shipped by air. MEKP gallon (#69-A) and case (#69-E) units cannot be shipped by air. Please see our Hazardous Shipping Chart for more information about hazard fees. We will consolidate items whenever possible to minimize these fees.


MEKP Hardener MEKP is available in a variety of sizes that include: One 1 ounce bottle (#69-A) One gallon (#69-D) One case of four gallons (#69-E)


4.7 star rating

no complaints

Sep 25, 2021  |  By Paul Aiken

always good fresh products

Resin Hardener MEKP

Jul 9, 2020  |  By Bradley Voogel

Fresh MEKP made my vinlyester cure clear and hard. The customer technician helped me troubleshoot my resin issue with auto parts store expired MEKP. Great service and product.


Sep 2, 2017  |  By Shelby

Quality stuff.
Great Product
Aug 31, 2017  |  By Dave Smith
I have used this product before and was very pleased
with the results. So naturally I went back to the same
product and was again pleased with the results.

MEK good -1oz bottle hard to manage small amounts.
Jul 16, 2017  |  By Joe Fraser
MEK is MEK it does what it should.
The small bottles though are difficult to work with and would be great if had a dropper top or something of that nature built in to dispense else when trying to just get a few drops it runs down the side of the bottle.
My solution was a 1ml medical syringe with the needle cut off. A dropper nozzle cap would have solved this more conveniently.
Owner Response: We do offer the 877-A Cap which is a nozzle tip.

Gel coal
Apr 28, 2016  |  By John wojcik
Ordered gel coat , first order , had quick shipping second order still quick shipping but one can of duralast was damaged do to poor packaging bubble wrap was stuffed Ian top of the cans none on the bottom or sides attention to detail or Quality control can make or break a company ,good products , please improve on packaging give you a 5 star it could change if I get anymore damaged products like I got today

good product
Apr 25, 2015  |  By Al P
enjoyed working with this product. did a great job

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