With its two-step soak off system, this Gel II Soak Off Gel Polish-Bright Purple is fused with essential vitamins and minerals to help promote your nail's growth and strength. Gel II Soak Off Nail Polish does not need a separate base coat because there is a patented non-solvent coating that is integrated into the gel polish. This coating acts like the base coat. This polish can be applied to acrylic nails because there are no harsh chemicals or acids in its formula and will last for weeks. It is great for those that are allergic and sensitive to gels and polishes that have base coats, bon-aids and primers.