Gravel-Lok® will leave an unsightly stain on pavers or flagstones. Avoid spilling or dripping it. You can use acetone to clean up the spill if you catch it immediately. Once cured, it may be impossible to remove it. Some people have had success with a product called Dad’s Easy Spray, a paint, stain, and varnish remover. Spray it on and allow it to sit for a few minutes and then use a wire brush to remove the stain. This process may need to be repeated.
Also, we do not advise coating pavers or flagstones with Gravel-Lok®. It is not a sealant and it will cause those surfaces to become too slippery and hazardous to walk on.