Price for Perma-Zyme has gone up! WOW. The first batch I bought (pre 1990) was a 55 gal drum of original Perma-Zyme (pre Perma-Zyme11X). Second batch was the concentrated form of Perma-Zyme11 in a 5 gal jug that cost $110/gal and I picked it up while there on a gambling trip! If I wanted more I would call International Enzymes in LasVagas and see what they told me.
M.Otto - Mike it is a soil stabilizer. I think it is similar to ESS-13. When I visited the manufacturer in L.Vagas they showed me the process and said it was an enzymatic process and made it from sugar cane. It looked like they were making big vats of dark beer. When mixed with the soil and compacted it gets very hard. They use it in the West a lot to build roads and airport runways. If you haven't found out more about it here is some links.
http://internationalenzymeslv.com/products/perma-zyme/https://www.youtube.com/watch?v=JaIpYpiDg6Qhttps://www.youtube.com/watch?v=rB5oWWvNCw8https://www.youtube.com/watch?v=TKr94EgDiSYSix year old road with perma-zyme
https://www.youtube.com/watch?v=GP7k2JNIE0M 
