Bought a gallon unfortunately based on many, many good reviews but this stuff sucks for making orgone generators. Takes FOREVER to cure, and having to maintain at least 75º in a room or outside is super uncomfortable. Doesn't always have shine in silicone moulds..and fuses itself to glass ceramic and metal. Also not safe for aquatic life. If Nicpro came out with another extra catalyst to adjust this goop that would be good but Everything sank to the bottom even waiting 30 min between layers ...So I ended up with a blob and wasted so much pretty material. This is however wonderful for small things like jewelry and it doesn't smell bad, you definitely have plenty of time to work with it, so if you're fast you'll hate this stuff... I won't buy this again