How do you prepare and measure epoxy resin?

Warning! Unlike polyester resin, achieving a successful epoxy resin mix requires precise dosing.

The dosing of a mixture can be done in two different ways: by weight or by volume.

By weight

To prepare a weight-based mixture, you will need an electronic scale with accuracy suited to the amount being weighed. First, place the empty mixing cup on the electronic scale and tare it. Then pour the required amount of resin into the graduated cup. In this example, we will use 100 g as the weighed amount of resin.

Use the mixing ratio indicated on the product containers or on the product’s technical data sheet. In this example, the mixing ratio is 100/42.

Calculation example:

Given that the resin quantity is 100 g, we must perform the following calculation to determine the amount of hardener to add to the mixture.

Calculation:
100 (resin quantity) × 1.42 (mixing ratio: 1 + 42/100) = 142 (total quantity).

According to this calculation, the total quantity of the mixture will be 142 g.

By volume

As for volume-based mixing, you will only need a graduated measuring cup. First, pour the required amount of resin into the cup. In this example, we will use 100 ml.

Use the mixing ratio indicated on the product labels or on the product’s technical data sheet. In this example, the volumetric mixing ratio is 2:1.

Calculation example:

Given that the resin quantity is 100 ml, we must perform the following calculation to determine the amount of hardener to add to the mixture.

Calculation for a 2:1 volumetric ratio:
Resin: 2 × 50 ml = 100 ml
Hardener: 1 × 50 ml = 50 ml

According to this calculation, the amount of hardener to pour is 50 ml.