I bought this digital scale at harbor freight tools for around $10. This scale is perfect and works great. It is accurate to 0.1 grams and has a tare function. I put my empty mixing cup onto the scale, and set to zearo. Add the sealant pat one, devide by 10 (mix is 10:1 by weight) and then add the required part two to the mix. No problem so far! It also came with a clear protective cover that snaps in place and doubles and a 'pan' for larger items. The scale is good for up to 1kg. and can be calibrated if required.
