This is very good product overall, easy to work with, forgiving to a small percentage mixing error. Fairly quick to cure, however one caveat I must tell that it doesn't cure fully until a long time i.e a week or so has passed. I made wall clock in a mold without the mdf board in the back. I noticed, it can bend even after 4 days of pouring the mix. Very easy to work with. Overall satisfied with the purchase, especially this 4L I bought in a flash sale.