Buy BASF GBL with confidence at GBLKing. ( gamma butyrolactone ) can be used in various areas: removing varnish, paints, graffiti, cleaning wheel rims, removing nail polish, cleaning industrial parts and much more. Our GBL is of highest quality, we do not sell Chinese based GBL products. We can supply our certification on request! For all inquiries please email us at [email protected] .