Milwaukee Makerspace Wiki

Sil-Bind is known as Sodium Silicate and is a waterbased non-toxic binder. We currently (as of March 2023) have an inventory of Sil-Bind.

Binders are best measured by weight. The ratios are pretty simple for every 100 lbs of sand, we use 4% in binder (4 lbs). 10% of the binder is 0.4 lbs (6.4 oz) and that is the amount of catalyst

Often we mix up 50 lb increments of sand at a time because each bag is #50. Do not change this ratio 100:4:0.4

There are different speeds of Catlyst. We have cat70 meaning you have a 70 minute set time. Giving it 2 hours to flip is a safe amount to prevent any issues of it not setting up.

Here is a chart for Sil Bind Chemistry