This product is a good price and works reasonably well. I usually use it as a base coat under my colour. It's also really easy to find in stores and is widely available..

I use this Sally Hansen Hard as Nails as my base coat before applying color. It really helps make my polish last a lot longer than it would without it. I sometimes put a coat on top just to seal in everything and that helps as well! I even wear this alone just to make my nails look healthier.

This is a clear nail polish that is specifically to harden the nails. I've used it and find it just so so. I never was a fan of clear nail polish but wanted stronger nails. I didn't expect results overnight but I choose not to buy it again.

I didn't notice much of a difference after using this. Not worth it.

My nails break easily, but after using Strengthener by Sally, only a couple times I started see the difference I have strong nails.

I bought this on sale and wouldn't have thought to get it at regular price, but I'm glad I made an impulse buy! After getting acrylic nails for the first time, my short nails were incredibly weak when they finally came off; I could barely scratch off a sticker without a nail breaking. I put a few coats of this on about every two days, and within two weeks my nails had become noticeably stronger. I love that this dries really fast (less than 10 minutes for 2 coats!) thinly, and without air bubbles, so you don't have to avoid touching things for an hour to avoid smudging or damage. It actually dries so thin that if you do 1-2 coats, it looks like a natural sheen on your nails rather than a clear polish. However, if you're planning on using it as a clear nail polish, put on multiple coats and then a different clear top coat, as if it's the only thing on your nails you'll find it chipping in a couple days. My nails are strong and healthy now but I still use this if I want to quickly and simply improve the overall look of my nails by adding clear polish.

Pretty good hardener. Worked a lot better to strengthen my nails than previous brands I've tried. Also doesn't peel

works very well. overtime my nails are beyond breakable!!.

Creates a nice thick coat that protects your nails if you keep them really long like me, it keeps them from bending or bowing. Lasts about two days for me until I need to reapply.

Super great product. I find my nails have hardened so much in just a little time. Super great product for the price. Definitely recommend.