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NCF Stone is designed to be used specifically with natural stone such as granite and marble, especially light-colored varieties of granite which are prone to discoloration when too much of our NCF Quick is used. We have tested this product on a variety of these sensitive granite types, and they did not discolor even when completely soaked with NCF Stone. However, NCF Stone should still be applied as a light mist- if the parts are becoming visibly wet, you are applying too much. We recommend using NCF Stone with all granite and marble, but especially with light-colored stones that may discolor with NCF Quick. It is a more expensive product per ounce than NCF Quick, but you do not have to worry about potential discoloration. There is no benefit to using this accelerator on stone types besides granite and marble, so we recommend using NCF Quick for other stone types. NCF Stone comes in a 6oz aerosol can. This accelerator is active for several minutes, so you can spray several pieces at once if you are making multiple bonds.
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