Will this work on honed marble or will it ruin the honed look?

I used this on the slate tiles on my porch...made the colors brighter and added a sheen of sorts. It didn't last more than a month, so it was a total waste of money and time. I don't think it is something you want to use on your honed marble. If you are looking just to seal, buy a sealer that doesn't enhance colors or change the sheen. (I am no stone expert, but I wouldn't put it on my marble)!

How clean does the river rock tile need to be in a shower that was installed 2 years ago before applying enhance and seal?

I over did the cleaning as the grout needed a lot of work. I use diluted cloro for the mold, rinsed then I did diluted vinegar. i waited until the shower floor was paper dried before I applied the sealer. I followed directions and did 2 coats. So far we are very happy with the results.

How do I prepare the slate for preparation? Can I just use warm water and detergent?

I used dish soap and water. Gave the stone a quick rubbing with a firm, but not hard ,bristle scrub brush. Then rinsed with fresh water. Let dry, then applied the 511. The 511 is amazing. That is how I did my two walkways. it took time but. worth it. I have a rather large back patio which I did ss well. Because the area I was to clean, and then enhance , was so large , I very, very carefully power washed to clean. If you decide to power wash , be very careful because too much force could flake this type of stone. I hope this was helpful.

I need a grout seaaler for use in shower with glass tiles. Grout is buttercream colored. Will this work or better suggestions

I don't have glass tiles so not sure for that as I used on a natural stone shower floor but my grout was light beige. Product worked well. Slightly darkened grout to what it looks like when wet. Holding on very nicely about a month in with much less soap scum on it. Not sure if it's meant for glass tiles.

Manufacturer	Rust-Oleum
Part number	CECOMINOD096695
Item Weight	3.18 Kilograms
Product Dimensions	10.8 x 17.78 x 29.21 cm; 3.18 kg
Item model number	SEENGAL4
Size	Gallon
Color	clear
Style	Compact
Material	Stone, Marble
Item Package Quantity	1
Included components	Color & Gloss Enhancers
Batteries Included?	No
Batteries Required?	No

SEENGAL4 511 Seal & Enhance Color & Gloss Enhancers, Gallon, 128 Fl Oz

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