A'GALORE & CO polygel extensions, the recommended type of gel base coat is a "slick" base coat. This product is described on their website as acting both as a primer and a gel base, which suggests its primary role is to enhance the adhesion and overall performance of the polygel extensions. Using this slick base coat will ensure superior adhesion between the nail and the polygel, contributing to the longevity and durability of the extensions. Please get in touch with us at (929)300-3050 for further information.