Our multipurpose solvent and dispersing agent, GBL cleaner, gives multiple stain removal & chrome polish methods. Gbl following day supply orders I have not heard of gamma-butyrolactose, and all I can discover with google is some DEA paperwork that look like a typo. Expensive purchaser, in this article you are https://bestchemshop.com/product-category/gamma-butyrolactone-gbl/