ISDIN Si Nails Fast Absorbing Nail Strengthening and Hardening Serum for Nail Durability in Thin Nails made with Cationic Hyaluronic Acid 0.08 FL OZ The first time you use ISDIN Si-Nails, activate the brush by pressing down on the applicator until the brush is moistened (approximately 25 times). Apply product to the entire nail and cuticle, covering the nail edges. Use on dry, bare nails for best results. Apply in vertical strokes across the entire surface of the nail and underneath the nail. Repeat steps 1-2 for each nail. Use only on the nail, and wipe off any excess product from the skin. Si Nails Uradin Body Lotion10 Uradin Podos Germisdin Original Can I use Si-Nails on top of nail polish or gel? Si-Nails is not designed for use on top of a polish or a gel. It should always be applied directly to bare nails that are clean and dry. How long do I need to use Si-Nails for? Results can be seen in as little as 14 days. However, it depends on the condition of your nails before starting Si-Nails nail strengthening treatment. The condition of your nails will improve with extended use. The first time I used Si-Nails, I didn?t see any product come out. How do I start using it correctly? Before using Si-Nails for the first time, activate the click pen by pressing down on the click button at least 25 times, until the applicator is moistened. This will activate the flow and you will be able to start using Si-Nails.