Bar Keepers Friend is safe and highly effective when used on BLANCO SILGRANIT sinks to remove stubborn metallic marks, hard water stains, or deep-set organic discoloration. Because SILGRANIT is an extremely hard, non-porous quartz composite material, applying Bar Keepers Friend (either the liquid or powder version) with a damp nylon sponge and scrubbing gently will lift stains effortlessly. Always rinse the basin thoroughly with clean water immediately afterward to keep the matte surface pristine.
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