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What is the difference between a sanding sealer and a varnish?
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A sanding sealer is usually a clear, thin liquid that is applied to a surface before it is finished with a fine-grit sandpaper. It creates a barrier against dust and dirt so that you can finish the surface quickly and easily. Varnishes are thicker liquids that are used for protecting surfaces from wear and tear. They are usually made of polyurethane or acrylic resins and are typically applied over a protective coating such as paint or stain.