What's the proper way to measure and mix System Three epoxies?

All System Three® epoxy products can be measured by weight or volume.  Pourable products can easily be measured by volume, but paste and putty products are most accurately measured by weight. 

POURABLE PRODUCT

To measure by volume:

Dispense from the plunger pump or pour the Part A (resin) and Part B (hardener) into a measuring and mixing container.

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Using a disposable stir stick or paint paddle, stir the liquid vigorously, then scrape the sides and bottom of the container. Generally, it should take no longer than a  minute for a larger 1-quart batch.  You will notice when initially mixing the epoxy that the appearance is cloudy.  As the material becomes better mixed, the cloudiness begins to disappear. When the mixture is clear, the epoxy is fully mixed.  Of course, the larger the batch, the longer it will take to fully mix.

PASTE AND PUTTY

To measure by weight:

For epoxy paste, measure out the correct ratio of Part A (resin) and Part B (hardener), using a paper plate or cardboard scrap on a gram or postal scale.  Mix together using a mixing stick or spatula until the material achieves an even color. 

For epoxy putty, measure out the correct ratio of Part A (resin) and Part B (hardener). Wearing disposable gloves, mix by hand rolling and kneading the epoxy until an even color is achieved.

For a more detailed description of measuring and mixing, see this section in The Epoxy Book.

 

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