removing slate sealer from a sandstone patio floor.

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Terry Hazledine

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removing slate sealer from a sandstone patio floor.
« on: December 18, 2016, 02:59:54 PM »
Hi, About 20 years ago a slate sealer was applied to seal our sandstone patio floor. The sealer is now breaking down and I would like to reseal the sandstone. Can I use a new sealer over the top of the old sealer or does the old sealer have to be removed? If so, do you have sealer remover?
Regards
Terry