Golden Rose Nail Expert Black Diamond Hardener Nail Strengthener

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nail hardener with black diamond powder for thin, easily broken and weak nails.

Black Diamond Hardener is a dual patented formula enriched with micro black diamond powder and hardening ingredients that creates a shiny, hard and protective layer on the nail, instantly strengthening brittle, soft and weak nails.

- With its quick-drying hardening film layer, it helps prevent peeling, breaking and layering of your nails.
- It protects your nails against the harmful rays of the sun with its UV filter.

Directions for Use:

- Shake the bottle.
- If you want to apply under nail polish, use it as a single layer on clean and dry nails, apply your nail polish after drying thoroughly.
- For extra protection, apply 2 coats on clean and dry nails.
- For best results, use regularly 2 times a week.


Orders can take 2-3 business days to process before shipping. As soon as your package has left our warehouse, you will receive a confirmation by email. 


If for any reason you are unhappy with your purchase we offer returns for store credit within 15 days of delivery. If 15 days have passed since your purchase has been delivered, unfortunately, we are unable to offer you a credit or exchange.

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