How do you mix polyester resin and MEKP?

TotalBoat Polyester Laminating Resin requires the adding of MEKP catalyst at the ratio of 7-8 drops of MEKP per one ounce of resin at 77°F (1. 0-2.2% MEKP based on the weight of the resin). Mix thoroughly for at least one minute and apply immediately after.

How much MEKP is polyester resin?

MEKP is a clear hardener/catalyst for the room temperature cure of unsaturated polyester and vinyl ester resins. It is also needed with all gel coats. It is typically used between 1.25% to 1.75% (1 2/3 ounce to 2 1/3 ounces per gallon).

How much hardener do you add to polyester resin?

The ratio range for catalyst to resin is 1 to 2 percent hardener to the total volume of resin to be used. For example, four drops of hardener will be 1 percent of 1 ounce of resin. Adding more of less of the catalyst agent will speed up or slow down the curing time for the resin.

How much catalyst do I need for polyester resin?

A rule of thumb for polyester laminating resin is between 1% and 2% i.e. 1% for summer (to give maximum wetting time) and 2% for winter. For polyester Gelcoats used in a moulding situation, we recommend from 2% to 2.5Êtalyst.

How do you mix Mekp?

TIPS: ALWAYS MIX THE MEKP INTO THE RESIN FOR AT LEAST 2 MINUTES, UNDERMIXING WILL RESULT IN UNCURED RESIN. NEVER MIX QUANTITIES LESS THAN ONE OUNCE, EVEN IF YOU ONLY NEED ONE TEASPOON, MIX UP AT LEAST ONE OUNCE LEAVING MIXED MATERIAL INSIDE YOUR CUP FOR EXTENDED TIME CAN RESULT IN A MUCH FASTER CURE.

How many drops of MEKP is 1 oz of gelcoat?

12 drops
We recommend 1.5% – 2.0 % by volume. The Ideal range is 1.8% @ 77°F (approximately 12 drops per ounce of gelcoat.)

What is surfacing agent resin ratio?

The recommended amount is 2 oz. Surfacing Wax per gallon on resin (approx. 1/2 cc per oz.) You can make your own polyester gloss resin by adding styrene to hotcoat/sanding resin.

How much resin and hardener do I mix?

Dispense the proper proportion of resin & hardener: 1 pump stroke of resin + 1 pump stroke of hardener results in the proper mix ratio when using calibrated pumps. Careful measuring of resin and hardener and thoroughly mixing epoxy are essential for a proper cure.

How many drops of catalyst do I need for resin?

Formula for one layer: if layer is 1/8 in. thick, use 15 drops per ounce of resin. If layer is 1/4 in. thick use eight drops per ounce.

How much catalyst can I mix with resin?

Fibreglass Resin: for 100ml of resin (cold day) use 2.5 to 3ml catalyst; and for 100ml resin (hot day) use 1.5 to 2ml catalyst.

What is the correct ratio of resin to MEKP?

Mixing resin Mix the polyester resin with a catalyst named methyl ethyl ketone peroxide (MEKP) to begin curing. Depending on the amount of resin needed, pour the appropriate ratios of polyester resin and MEKP into a heavy-duty plastic tub or bucket. The standard ratio is 1 oz. of MEKP to 1 gallon of polyester resin.

How much MEK to add to polyester resin?

MEKP can be added to polyester resin in the range of 1 to 2% by volume or weight. The mid point of 1.5% is most common. Less MEKP gives a slower cure, more gives a faster cure. Mixing out of the above range will result in a weaker cured resin.

What kind of catalyst is needed for thermoset resin?

Catalyst, also referred to as M.E.K.P. (methyl ethyl ketone peroxide) is the chemical used to cure thermoset resins in particular polyester resin, gelcoats, and vinylester resins, by reacting with the promoter in the resin. A minimum of 1% ratio is required for curing of most resins, measured by weight of resin.

How long does it take for polyester resin to harden?

The resin mix will be usable for approximately 15 to 20 minutes before it will begin to harden. Apply the polyester resin to your project before this time elapses. Some polyester resin manufacturers will include a color and wax mix with the resin purchase. Wear heavy-duty gloves, safety glasses and a respiration mask when mixing polyester resin.