CONSERVARE Hydroxylating Conversion Treatment

CONSERVARE Hydroxylating Conversion Treatment (HCT) is a waterborne stone consolidation treatment intended to protect and strengthen deteriorating carbonate building stones such as marble, limestone, dolomite and travertine.

The manufacturer, PROSOCO, Inc. claims that this product forms a stable, well-adhered, hydroxylated, conversion layer on carbonate mineral grains and that this layer dramatically increases the resistance of marble and limestone surfaces to acid attack, and improves the ability of a variety of chemical compositions to react with or bond to such surfaces.

Specification
The manufacturer's recommended specifications are as follows:

Test area
The manufacturer recommends preparation of a minimum 4 ft. by 4 ft. test area on each type of masonry. Test panels should be allowed to dry for three to seven days before inspection. Test panels should remain available for comparison throughout the cleaning project.

Application
Before applying, read “Preparation” and “Safety Information” sections in the Manufacturer’s Product Data Sheet for HCT. Do not dilute or alter.

Working from the bottom of the work area to the top, apply Conservare® HCT in three successive saturating applications. Treated surfaces must dry thoroughly between each saturating application of HCT, and prior to application of HCT Finishing Rinse.

HCT
1. Apply HCT to the point of rejection. 2. Allow the treatment to be absorbed for 30 minutes or until surface is visibly dry and absorbent. 3. Repeat steps 1 and 2 until three saturating applications have been completed. With some stones (e.g. porous limestone), additional applications may be required. 4. Allow surfaces treated with HCT to dry for 30 minutes or until surface is visibly dry.

Finishing rinse
1. Apply HCT Finishing Rinse to the point of rejection. 2. Allow treated surfaces to dry for 24 hours before applying additional conservation treatments or surface repairs.

Note: A minimum of 30 minutes drying time is essential between applications. If necessary, drying time may be extended overnight without adverse effects.

Cleanup tools and equipment with fresh water.

Technical data

 * FORM: Clear liquid - slight odor
 * SPECIFIC GRAVITY: 1.009 g/ml
 * pH: 4.0 (+/- 0.2)
 * WEIGHT: 8.39 lbs./US gal.
 * ACTIVE CONTENT:
 * TOTAL SOLIDS:
 * FLASH POINT:
 * FREEZE POINT: < 32 degrees F (0 degrees C)
 * SHELF LIFE: 1 year in tightly sealed, unopened container.

Limitations

 * May facilitate treatment or repair of aged concrete or concrete with a predominance of carbonate aggregate. Always test.
 * Not suitable for fired clay, granite, sandstone or slate substrates.
 * Not suitable for use on polished marble, travertine or limestone.