A4 YELLOW is a new concept polishing powder very very versatile with high performances. Its special formulation guarantees product effectiveness on almost all carbonate surfaces including the most difficult ones. Compared to A3 YELLOW the product is also effective on the most difficult marbles, such as the yellow ones and provides a much intense shine if seen against the light. The product reacts with the surface engendering a superficial compound with much hardness with consequetn increase in the resistance to traffic compared to initial status of material

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