ISDIN Si-Nails


3 reviews

ISDIN Si-Nails is an innovative nail growth formula clinically proven to strengthen brittle nails by increasing thickness, density, and durability of the nail and cuticle

  • Increases nail strength and durability while helping to repair brittle nails and reduce roughness
  • Promotes keratin and silicon in the nails to help improve growth, and overall quality
  • Hydrates the nails and cuticles, moisturizing the entire nail structure to keep nails supple and flexible
  • Visible results in just 14 days
  • Fragrance free, fast-absorbing, invisible finish


  • Silanediol Salicylate – Promotes silicon, which is one of the predominant minerals in the nail
  • Pistacia Lentiscus Gum – Promotes keratin, an essential component to strong and healthy nails
  • Cationic Hyaluronic Acid  An enhanced version of one of the most well known moisturizes in the world, which promotes cuticle moisturization

DIRECTIONS FOR USE: Si-Nails nail strengthener is a clear, lightweight serum delivered by an easy-to-use, one-click applicator pen, applied once a day. Use on dry, bare nails for best nail repair results. 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). Visible results may be seen in 14 days, with best results achieved from ongoing application. Use only on the nail, and wipe off any excess product from the skin.

SIZE: 0.08 Fl. Oz

Customer Reviews

Based on 3 reviews
Teresa S (San Diego, US)
It’s ok

So far I haven’t noticed any chances in my nails. I was a little disappointed because the click pen seems almost empty and doesn’t always work when you click it

Toni Storer (Encinitas, US)
Great Product

I’ve been using this product for over a month on my dry, grooved, splitting nails and have had excellent results. My nails are much smoother with no splitting! I’m able to grow them out now!

Courtney (El Cajon, US)
Seriously healthy nails

My nails are incredibly nourished and strong since using this serum. I carry it in my purse, 1 in my car, & 1 at my desk. I notice my cuticles are healthy and moisturized. I've been refraining from acrylic/gel and was worried about my natural nail strength but my nails are stronger than ever. I love this product