Our HD Acrylic System is the most advanced formula out there. Incorporating the flexibility and performance of a homo polymer, while maintaining the adhesion and application of a co-polymer, our signature Time Release Technology increases working time, strengthens and extends nail performance maintains the color of the nail with optical brighteners, and says no to yellowing, all in one step. WARNING: This product can expose you to chemicals including Titanium Dioxide, which is known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov.