Mavala Scientifique K Plus Nail Hardener, 5 ml

Healed the vertical split in my nail!!! I use this as my first coat under my base coat. The bottle is tiny, but it will last forever because it’s very liquid and easy to apply.I cannot believe the split, that I have had for YEARS and tried everything on, is literally fused back together.This product seems expensive, but it is a miracle in a bottle!!Get it and be amazed! Thank you Mavala!!!

I bought this because the reviews were great, however it didn’t work for me, I already had long nails, but I bought this to help them grown longer and protect them, after using it for 3 days some of my nails broke, for some reason it made my nails brittle, so I wouldn’t recommend and it’s very expensive for what it is

Definitely the best nail hardner on the market. It’s a blue tinged liquid you apply to nail tips only, not the consistency of nail polish but it does the job perfectly.

I always buy this product best on the market

This nail hardener works extremely well and I'm very pleased with it.

I wish I took a before picture of my nails to show the difference in just use of two weeks (re-apply every 3 days) - my nails layer and peel, be transparent in areas and very prone to breaking. Since using the strengthener they have become solid, healthy looking and strong! I did break one of my thumb nails and let me tell you - the nail itself was so strong that I had to end up cutting the break off because it wouldn't go by itself. Even since the break (1 week) the nail is already growing back at fast pace. I absolutely recommend this product but use it as and when rather than daily, for my nails I found every 3 days keeps them at the right strength and good growing pace.

The nail repair product is not miraculous, but it definitely helps after removing nail extensions. It’s effective in restoring nails, though it feels quite sticky and thick."

This product has made an impact on my nails in only one use, and three treatments in, I’m very happy with results. I have very flexible, weak nails, which get caught on things and bend backwards. This can cause me a heap of pain, and can also damage the nails themselves. I’ve tried a number of products from different fancy brands, but this is the most effective I’ve found. Within a week, my nails feel much stronger, and I don’t need to be careful when doing simple things, like drying my hands with a towel.I think this product would be really helpful for anyone like me, who has very bendy, weak nails. If you have nails that are getting damaged because they are hard and brittle, it will probably not do you any favours, and will probably make your problems worse.The bottle is teeny tiny, but that’s fine as you don’t need much at all. The opening the brush comes out of is really well designed, as it helps you remove any excess product. The brush is slim enough to allow you to apply it carefully - it does warn you not to get it on your skin, or you’ll end up with hard skin! The smell isn’t overpowering or too unpleasant, in my opinion. It just smells a bit menthol-y.