OPI RapiDry Quick-Dry Top Coat is a nail lacquer top coat designed to cut manicure dry time down to about 30 seconds while sealing color in with a glossy finish. It's applied as the last step over regular nail lacquer, not as a treatment on bare nails.
The fast-drying effect comes from quick-evaporating solvents (ethyl acetate, isopropyl alcohol, butyl and propyl acetate) combined with film-forming resins that set almost immediately on contact with wet polish. It's a vegan formula, made without animal-derived ingredients.
For best results, wait 60-90 seconds after the final coat of nail lacquer before applying RapiDry, then brush on a single coat starting near the cuticle and pulling out to the free edge. Nails are dry to the touch in about 30 seconds, though polish still needs roughly 24 hours to fully harden all the way through, so tight gloves or heavy impact are best avoided during that window.