One of the best-loved products of Japan's expert scratch-builders, Sube Sube putty is a super high-quality putty for use in final finishing of items, as it dries with an extremely high-polished surface. A very small amount of hardener (2%) is added, then you knead the putty well and you have a 6-10 minute time frame where the putty is workable. Completely hardens to toolable condition in 25-40 minutes. White in color.