ChemCalc A Think & Engage Brand

MEKP Calculator

For Polyester Resins & Gelcoats

Enter your batch volume and shop temperature to get an exact catalyst measurement in ccs and drops — the numbers pros and first-time repairers can both work from.

Measurement System

Sets the units used throughout.

The resin doesn't care which system you use — only that you pick one.

Ambient Temperature

Shop or on-water temperature at time of mixing.

Resin / Gelcoat Volume

How much material you are catalyzing in this batch.

MEKP Percentage

Lock to the Duratec ratio, or dial in your own.

1.8%
1%2%3%

Mix Result

On recommendation

Add this much MEKP catalyst

—cc

≈ — drops

Recommended % —
Percentage used —

Recommended MEKP % (based on temperature):

Using slider value:

MEKP CCs:

MEKP Drops:

Tips & Safety

MEKP is an organic peroxide. Read these before you open the bottle.

Other Calculators

More mixing tools for hull, deck and topside work.

Spot something off, or need another ratio?

Tell us what to fix or add — every report is read by the team behind ChemCalc.