DND Gel Base & Top 500 600 is the two gels that bracket a DND colour service, bought together: the base that holds it down and the top that seals it in.
The DND system numbers its gels 500 for base and 600 for top, which is the pairing the regular DND colour wall sits between.
What it does
Adhesion: gives the colour coat something to
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Dnd gels are the best gel polishes ive ever used!!