CATALYST MEK Peroxide 30 & 50% in Canada

CATALYST MEK

MEKP(Methyl Ethyl Ketone Peroxide) is the catalyst added to polyester resins, casting, tooling,vinyl ester and ISO resins as well as gelcoats. As the catalyst mixes with the resin or gelcoat, a chemical reaction occurs, creating heat which cures (hardens) the resin or Gelcoat.

View our Catalyst Mixing Guide

Hardener 100 ml Mix & Measure Kit

Can$3.99

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69206

Average rating:

Hardener 500 ml Mix & Measure Kit

Can$7.99

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69209

Catalyst/Hardener 5 ML 50%

Can$2.63

37501

Average rating:

Catalyst/Hardener 14 ML 50%

Can$3.42

37503

Catalyst/Hardener 56ml 50%

Can$6.68

Catalyst is as a Hardener for resins and Gelcoats.

37505

Catalyst/Hardener 2x125ML

Can$17.58

Rayplex Catalyst #375 is commonly known as MEKP (Methyl Ethyl Ketone Peroxide). This catalyst is added to polyester resins, casting, tooling, vinyl ester and ISO resins as well as gelcoats. As the catalyst mixes with the resin or gelcoat, a exothermic chemical reaction occurs, creating heat which cures (hardens) the resin or Gelcoat. Its role is to trigger the resin to solidify from liquid form. Typically ratios of 1%-3%, depending on the product.

Dispensing

It's crucial to handle MEKP cautiously due to its nature as an organic peroxide, requiring appropriate Personal Protective Equipment. Always were gloves and goggles when handling or dispensing the product.

Here's how it's used:

Catalyst Role: MEKP initiates and speeds up the curing of polyester and vinyl ester resins, creating a durable composite.
Mixing: It's mixed with resin before application, following specific ratios to control curing and processing time as recommended by resin manufacturers.
Curing: Once mixed, MEKP triggers a chemical reaction that crosslinks and solidifies the resin. Generally the warmer the resin the faster it will cure. Cold temperatures can greatly increase the cure time.
Safety: Handling MEKP requires caution due to its flammability and potential for toxic fumes. Always use protective gear and work in a ventilated area, adhering to safety guidelines.
Shelf Life: MEKP has a limited shelf life and can lose effectiveness over time. Old Catalyst is not as reactive as new. Resin types, environmental conditions, and specific applications can influence curing outcomes.
For very hot conditions Rayplex has slow Catalyst #376 Do not use this with Gelcoat.

Dangerous Goods Charges Apply

37508

Catalyst/Hardener 8LB 50%

Can$77.93

Dangerous Goods Charges Apply

37536

Average rating:

Catalyst/Hardener 50%

Can$0.00

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Select size for pricing:

DG fees applies to:

Catalyst 125ml x 2 50% (goes with 20L)
Catalyst 8Lb 50%

375

Hardener 125ml x 2 @ 30%

Can$16.25

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2 x 125ml Slow Hardener

Dangerous Goods Charges Apply

37608

Average rating:

Hardener Dispenser

Can$17.40

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Useful tool that takes the guessing out of the exact amount of catalyst to use.
Size 35cc

65200

Measurment

Imperial Ruler Measurement Chart @1.5% Per Inch of Material
Tub #	Tub Sizes	Height Height	CC or Oz per Inch	Hardener Added Per INCH of Resin or Gelcoat
	Oz.- CC			CC
16622	3.5 -100	1.5 in	65	.9
66224	8 - 250	2.75 IN	150	2
66230	16 - 450	2.5	180	3
66256	53 -1500	4.25	350	5
66245	83 - 2365	5.25	450	7
66258	165 - 4700	7.25	645	10

Metric Ruler Measurement Chart @1.5% Per CM
Tub #	Tub Sizes	Container Height CM	CC per CM	Hardener to Add / CM of Resin or Gelcoat
	Oz.- CC	CC		CC
16622	3.5 -100	3.81 cm	1.5	.4
66224	8 - 250	7.0 cm	3.7	.7
66230	16 - 450	6.35	6.7	1
66256	53 -1500	10.8	22	2
66245	83 - 2365	13.34	35	3
66258	165 - 4700	18.42	70	4

Weight

Catalyst by Weight (Metric) For Gelcoat. SG 1.4
Tub #	Tub Sizes	# of Grams Of Gecoat	CC or Oz per Inch	Hardener Added To Gelcoat
	Oz.- CC			CC
16622	3.5 -100	140	65	1.5
66224	8 - 250	350	150	3.7
66230	16 - 450	630	180	7
66256	53 -1500	2100	350	22
66245	83 - 2365	3300	450	35
66258	165 - 4700	6500	645	70

for odd amounts or gelcoat multiply the wieght x 1.1 %

Example 3000 gram of gelcoat 3000 x 1.1 =33 ml or cc of Catalist

Catalyst by Weight (Metric) For Resin. SG 1.12
Tub #	Tub Sizes	# of Grams Of resin	CC or Oz per Inch	Hardener Added To Gelcoat
	Oz.- CC			CC
16622	3.5 -100	112	65	1.5
66224	8 - 250	280	150	3.7
66230	16 - 450	500	180	7
66256	53 -1500	1680	350	22
66245	83 - 2365	2600	450	35
66258	165 - 4700	5200	645	70

for odd amounts or resin multiply the wieght x 1.4 %

Example 3000 gram of resin 3000 x 1.4 =42 ml or cc of Catalist

Container Size

Hardener Concentration Chart

Volume of Hardener to be Used with Polyester Resins M.E.K. Peroxide (2) -Percent by Volume

Tub Sizes

1/2%

3/4%

1.5%

Oz. CC

Oz.

8 220

16 450

1/8

1/4

3/8

32 900

1/4

3/8

1/2

3/4

53 1500

1/4

1/2

7/8

83 2340

1/2

3/4

7/8

1 1/4

1 3/4

163 4600

7/8

1 1/4

1 3/4

2 1/2

3 3/8

All measurements are estimations. Never catalyze more than 2%. Always wear safety glasses.

Never use metal measuring spoons. Use measuring devices made from plastic.