Its portland type 2, argonate mixed together you must leech it out for about a month or 2. Some use vinegar to leech it faster I let it do it itself. Soak in a bucket water for a week check the ph it will be off the scale empty water check again in a week and so on and so untill the ph stays the same reading as the water you are filling the bucket with. Take a rubbermaid container fill it with moist sand dig out a shape in the sand fill with mixture. Some people use cheerioes cause after the portland dries and you leech it, the cheerioes get soggy and fall apart and you are left with what looks like real figi.