We have very old and ornate capitals on our building's columns. They are made of stone or a very fine mortar that looks like stone. The capitals are losing their ornate characters from rain and wind. We have been able to work with an art school and they made a sand mold. We tried plaster and the result was beautiful but the plaster is too soft. Do you have a product we can cast our capitals out of?
This sounds like very delicate work. I have a durable product you can pour into a mold and get a very faithful casting against the mold's face. The product is called Crystex Grout. Your casting crew needs to add water to the Crystex and mix the Crystex to a smooth and lump free condition. Pour the fluid Crystex into your mold and let it set over night or as long as you wish beyond the overnight setting. The newly cast capital should be beautiful.