HT-704X is a stable liquid which has been specifically formulated for pre-cleaning blackened limestone precleaner and marble precleaner. Questions? Contact us
It is usually beneficial to first pre-rinse the stone with high pressure water before applying. Since surface conditions vary considerably, two patch tests should be conducted first to determine whether or not pre-rinsing with high pressure water is required. The product should be applied by spray, brush or roller. Nylon brushes and Dynel rollers are recommended. Do not use bristle brushes or wool rollers. Contact time of the product with the blackened stone will vary from 15 minutes up to 30 minutes depending on the amount of accumulated soil on the stone. It should be applied to the building surface from natural break to natural break. In many instances, the product can be applied to an entire face of a building, thereby allowing a prolonged contact time, before high pressure water rinsing commences. Unusually dirty marble or limestone found on interior or exterior substrates may require our HT-704X HEAVY DUTY LIMESTONE and MARBLE PRECLEANER. Unusually dirty exterior substrates may require our water mist process. Testing and consulting with the manufacturer’s representative will determine the best procedures.
The most important step in cleaning limestone and marble is the rinsing procedure. First the precleaner is rinsed off by high pressure water, 1500 PSI (minimum] at 5 GPM (minimum). This is followed immediately by spraying (low pressure 10-30 PSI) our HT-907 LIMESTONE and MARBLE CLEANER and BRIGHTENER on the surface: after a contact time of only two or three minutes the brightener can be rinsed off with high pressure. The use of our HT-907 LIMESTONE and MARBLE CLEANER and BRIGHTENER assures the brightening of the stone to its original color and that the surface will be neutralized. Please refer to our Product Data Bulletin on HT-907 Hydroclean’S LIMESTONE and MARBLE CLEANER and BRIGHTENER.
HYDROCLEAN’S HT-704 LIMESTONE and MARBLE PRECLEANER is effective in removing residual vine stems from masonry substrates. Since HYDROCHEMICAL TECHNIQUES shall have no control of the use of the product described herein, HYDROCHEMICAL TECHNIQUES assumes no liability for loss or damage incurred from the improper use of such product.
Removes carbon based (organic) contaminants from interior & exterior substrates. Must be followed by HT 907