Sally HansenDiamond Strength Nail Hardener, 13.3ml, Matte Top Coat

This stuff works. My nails are always breaking, splitting etc but this is proper reinforcement. Needs reapplying every few days but is effective.

Really helps stopping nails breaking

Delivers what it promised! So easy to use and it strengthens nails. I wish it the bottle and liquid inside doesn’t dry up too quickly though as the product is effective.

I, like another reviewer bought this because of the 'Matte' element of the Amazon description. It's not matte, but it's not really glossy either, and the bottle doesn't say it's matte! However in the absence of anything else I decided to use it. It has been really good. I have a problem with several of my nails splitting regularly every couple of days. The split hasn't grown out yet but since applying twice a day the split hasn't opened up as it would usually do. I am really pleased with it so far and would definitely recommend it.

Not yet sure how this works as a strengthener, will give it longer for a trial. I am disappointed that it really isn’t ‘matte’ at all, which is what I wanted.

Excellent product and cheaper than in Boots

Good quality easy to apply dries quickly and made a difference to my nails which were quite brittle before use.

I have been using this product for years, having had soft nails all my life which split easily. This nail hardener is certainly diamond strength and keeps my nails true through all my daily tasks for at least a week. Great value for money in my book.