Liquid Quartz™ sealer is certified food safe water based sealer. It is UV stable & abrasion resistant. Once cured it is waterproof & stain resistant. It is also antibacterial & so can help prevent the formation of algae, moss, fungus, scale, & efflorescence on outdoor pieces. It is stable from -70°C to 450°C (-94°F to 842°F) & so is freezer/dishwasher/microwave/oven safe. Liquid Quartz™ is generally touch dry within an hour & fully cured after 24 hours without firing or any further treatment. If working in a very humid or dark environment, note that the sealer could take up to 5 days to fully cure – see page 6. Store the bottle in a dark, cool place away from direct sunlight (or your hot kiln).
Testing: Certification: Liquid Quartz™ is not designed to create a seal over a glazed/glossy/non porous surface, so it is unlikely to make your lead based or toxic glazes food safe. It has been designed to seal porous surfaces only. It has not been tested for sealing Raku/matte glazes, however it has been reported (by users of the product) to stop seepage & staining when applied to underfired &/or matt glazed pieces in some instances. Testing is recommended if you are at all concerned about your unconventional glaze/process. Likewise, if you use a post firing chemical or toxic ingredient in the firing of your work (like ferric chloride) that will not burn out or cure at the temperatures you fire to, you should test your work for food safety before using it for food service. We also cannot guarantee the food safety of pieces treated with chemicals or minerals with a particle size of less than the particle gap of Liquid Quartz™ (20-100nm) as any particles smaller than this could in theory pass through. If your surface is stable & properly fired, this should not be a concern.
