APPLICATION On quarry tiles, glazed tiles, brick, stone and slate, also on other surfaces as chrome, stainless steel, etc.
DIRECTIONS FOR USE First try HG “extra” in a small, preferably inconspicuous area. Dilute up to 1:10 parts clean cold water. In bad cases HG “extra” can be used neat. Apply the solution liberally and spread over the surface. Covering no more than 10 - 15 m2 at a time. Allow 15 minutes for the solution to activate. During this time the surface should be kept wet with the HG “extra” solution. Scrub thoroughly with a souring pad or a stiff scrubbing brush and mop up. Rinse well with water at least 2 - 3 times. If necessary repeat same application but locally, when white stains appear.
ATTENTION Please beware! Do not apply to calciferous natural stone such as marble, travertine, Blue (hard)stone, several types of slate, terrazzo, granito and cement tiles, or on other surfaces, which are not acid-resistant.
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