This article by the Bluebottletree is a comprehensive guide to the best sealers for your clay projects. A detailed test of brush on sealers and spray on sealers were used with a controlled master cane as shown above. Do you have a preferred sealed? For me, it depends on what I am using the piece for, for small projects I like a high gloss water-based varnish but for larger projects.
It is not as straightforward as you may think, On different brands of clay, each polymer clay sealer performs differently. On one brand of clay, the same varnish would work perfectly, but on another, it would fail terribly. Choose the appropriate polymer clay sealer for your clay brand.
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