Slate pre-grout sealing tiles look dull/hazey
Hi, my name is Dave and hoping someone can provide some insight to my problem: Just installed 3x6 kitchen backsplash tiles, copper rust slate. Everything going great, love the look and want to keep the natural look of the slate - no color enhancing or gloss. Then we put on first coat of pre-grout sealer (water based, Premium Gold Slate & Quartzite Sealer made by Superior Adhesives & Chemicals = $50/quart). Application was easy enough, followed directions, didn't put too heavy of a coat on, left on for 5 minutes then wiped off. Compared to pre-seal appearance, ENTIRE backsplash now looks dull and muted, I guess I'll call it hazey. Don't want to put on another coat or start grouting until we address this problem.
Tile store staff said maybe we didn't wipe enough of the sealer off and to put on another coat to re-emulsify original coat and being careful to wipe off... but we were very careful when we applied and scared to put any more on. Read another website that said water-based natural sealers are tougher to apply and are prone to this hazing/dulling effect...and that solvent based natural-look sealers are easier to apply?
Any thoughts? Should we stick with the water-based sealer and try another coat - and if so what are we doing wrong? Is there a way to "remove" the first coat of sealer that we've applied like vinegar/water, or do we need a chemical? Can a solvent based natural-look sealer be applied over the water based sealer? Any other suggestions for getting rid of that dull look? Any other sealer type/brand suggestions?
Thanks a ton in advance, learned alot from the forums here! Dave