Thin is the finest grain Milliput putty and best for fine details. The two sticks have a long shelf life but once mixed the resultant putty is at first soft and highly adhesive and then gradually hardens. Speed of hardening is dependant on temperature and at room temperature. Milliput becomes rock hard in three to four hours. By the application of heat the setting time can be reduced to a few minutes. After setting hard Milliput continues to cure and is fully cured after an elapse of time equal to the setting time at the same temperature. Once fully cured Milliput can be drilled and sanded. It is recommended that you apply primer before painting to ensure good adhesion. Contains two 56.7gm sticks and the general instructions for preparation and usage.