Gel nails are naturals, glossy Freshly-manicured for up to 14 days. Gel nails can be applied with or without a base or primer.(CND GEL uses a non-acid primer to bond the gel to the nail). If primer is applied correctly, it does not damage the nail bed. Faster curing time. Most gel nails are cured under uv-light, some cure with a gel activator and do not require uv-light (no-light gels).