Sally Hansen Diamond Strength® Instant Nail Hardener Treatment, 0.45 fl oz
Sally Hansen Diamond Strength® Instant Nail Hardener Treatment, 0.45 fl oz
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Sally Hansen Diamond Strength® Instant Nail Hardener Treatment, 0.45 fl oz

Key item features

Sally Hansen Diamond Strength® Instant Nail Hardener, 0.45 fl oz

  • Strengthening Formula - Protect nails with a titanium formula that instantly bonds and strengthens nail layers
  • 10 Day Protection - Provides up to 10 days of protection against splitting nails
  • Instant Results - Have beautiful nails at your fingertips as soon as you apply one coat
Current price is $6.74$14.98/fl oz
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Customer ratings & reviews

4.3 out of 5 stars
stars2,573 ratings2,443 reviews
How item rating is calculated
  1. 5 stars57% (1,479)
  2. 4 stars25% (633)
  3. 3 stars12% (318)
  4. 2 stars3% (82)
  5. 1 star2% (61)

Reviews summary

Pros

  • : Application process is effortless and requires minimal effort.
  • : Offers a wide range of bright shades.
  • : Provides a shiny base or top coat finish.
  • : Provides hard nail strength.
  • : This product has a lower price point compared to similar products.

Neutral

  • : Can be long-lasting, but may chip easily depending on usage.
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Showing 1-3 of 2,443 reviews

May 22, 2026
Yvonne
Top Reviewer
5 out of 5 stars review

Verified Purchase

Sally Hansen Diamond Strength Hard as Nails!!Have used this product for YEARS! I always use, never a problem, %26 does exactly what it says it will do! I do not use any other brand!

Helpful?4B9D39KB5J0J512983032
Feb 20, 2025
Suecee
5 out of 5 stars review

Great product

I have been using it for 2 weeks and I am very impressed. I highly recommend this to keep your nails from breaking and chipping

International review
Review from sallyhansen.com
Helpful?4B9D39KB5J0J512983032
Apr 12, 2017
Ailsa
5 out of 5 stars review

Hard as Nails!!!

My nails always broke. Hated them so much! Bought this and it's transformed my nails. So so happy! They feel thicker harder, and great for back scratches too!!

International review
Review from sallyhansen.com
Helpful?4B9D39KB5J0J512983032