GREENTECH GYPFLOW LEVELER GL-66 is a gypsum based self-levelling underlayment complied with EN 13813 class CA-C30F6. It is highly flowable which provides an ultra-smooth surface. Thank for gypsum nature, the product is fast hardening which has low moisture content at early stage, which allow light traffic as well as to apply finishing layer in short time. Due to low shrinkage property, GREENTECH GYPFLOW LEVELER GL-66 can build up to 35 mm in one layer without shrinkage crack. Smooth surface and thick layer application is ideal for internal floor levelling for new and old buildings.