Rock Hard Natural Stone Densifier



Step 1 – Stone Hardener

ROCK HARD™ densifier is the first step of a synergistic two-step polishing and maintenance program for all types of terrazzo and natural stone. ROCK HARD™ works to harden the surface of terrazzo, marble, and granite. Then, with the use of DIAMOND GLOSS™, and easy-to-maintain, super high gloss is produced on the surface.

Terrazzo (both cementitious and resinous) will be improved with this process. It is recommended for polishing hard marble surfaces (such as serpentine) and most types of granite. It works to form a protective layer at and below the surface. Continued use of this product will increase the density of the surface. This will make the surface more resistant to wear and staining.

Authorized UL Product


SURFACE HARDENING: The surface must be dry and free of any coatings, grease, or oil.
Remove any floor coatings, greases, or soils by using HURRICANE™ Intensive Stone Cleaner.

  1. Mist 4 trigger pulls of ROCK HARD™ onto a 9 sq. ft. (1 sq. m) area.
  2. Buff with an AQUA MAGIC™ pad until dry. Repeat this process 1-2 more times until a slight gloss is achieved.
  3. Best results are obtained using the STONE BLAZER™ floor machine with a total weight between 140-180 lb. It may be necessary to repeat this 3-4 times on a very porous stone or cementitious terrazzo.
  4. Then mist 3 more trigger pulls of ROCK HARD™ and buff with a steel wool pad until the surface is dry.

Repeat the process until the surface has a moderate gloss at a 60° angle.

NOTE: If moisture is present, the steel wool pad may leave a dark transfer. Use an AQUA MAGIC™ pad and buff ROCK HARD until dry.

COVERAGE: For ROCK HARD: 25,000 – 30,000 sq. ft. (2,300 – 2,800 sq. m) per gallon.