SILIGRAN® is natural silica sand or quartz gravel, which is multi washed, dried and sieved into different gradings between 0.063 - 16 mm.
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SILVERBOND® is iron-free milling silica sand out of own deposits with a purity of > 98.5 weight %.
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is based on the quartz powder SILVER BOND M6 produced - dusted - quartz powder
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