Would this be safe for granite tile provided that the tiles are sealed?

I used it on the grout between my granite tiles. The tiles aren't sealed. I reviewed it here: http://juliecache.com/2014/03/08/new-and-improved-backsplash-and-counter/.html The black color hasn't faded yet.

I have white grout now will this change the color to black? That's what I want to do

Yes. It is like paint so you'll want to be careful not to get the black on your tile.

Once applied, how do I keep tiles clean?

Clean the floor tiles the way you normally do. The grout stays black. Although. I probably wouldn't use a bleach based cleaner.

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Rainbow Chalk Markers Limited Grout Pen - Designed for restoring tile grout in bathrooms & kitchens (Black)

Rainbow Chalk Markers Limited Grout Pen - Designed for restoring tile grout in bathrooms & kitchens (Black)

Product ID: 257690963

Details

Brand
Rainbow Chalk
Item dimensions L x W x H
9.5 x 1.4 x 19
Item weight
25 Grams
Material
Water Based
Style
Compact

📏Covers up to 60 meters grout lines

🖊️5mm reversible nib for precision

🛡️Anti-bacterial & anti-fungal formula

5089 kr

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Transform your grout, transform your space 🏡

SAFE ECO FRIENDLY - Water-based, non-toxic ink ensures safe use in enclosed kitchens and bathrooms without harsh chemicals.
LONG LASTING COVERAGE - One pen covers an impressive 60 meters of grout, making your renovation budget-friendly.
PRECISION RESTORATION - Reversible 5mm nib lets you tackle both fine and broad grout lines with ease.
MOLD RESISTANT FORMULA - Anti-bacterial and anti-fungal agents actively prevent mold reappearance, keeping your space fresh.
WATER RESISTANT FINISH - Durable, water-resistant coating protects grout from daily moisture and stains for lasting cleanliness.

The Rainbow Chalk Markers Limited Grout Pen in Black is a water-based, non-toxic grout restoration tool featuring a reversible 5mm nib for precise application. It covers up to 60 meters of grout lines and includes anti-bacterial and anti-fungal agents to prevent mold growth. Ideal for kitchen and bathroom floors and walls, it delivers a water-resistant finish that revitalizes grout lines, making tiles look brand new while ensuring long-lasting protection.

Specifications

ASIN	B006MCRIA0
Best Sellers Rank	#112,063 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #326 in Tile Grout #779 in Flooring Products
Brand	Rainbow Chalk Markers Limited
Brand Name	Rainbow Chalk Markers Limited
Color	Black
Compatible Material	Grout (Unsealed)
Customer Reviews	4.2 out of 5 stars 5,489 Reviews
Item Dimensions	9.5 x 1.4 x 19 centimeters
Item Form	Pen
Item Weight	25 Grams
Item dimensions L x W x H	9.5 x 1.4 x 19 centimeters
Item weight	25 Grams
Manufacturer	Rainbow Chalk Markers
Material	Water Based
Material Type	Water Based
Model	GP81107
Number of Items	1
Number of Packs	1
Part Number	GP81107
Style	Compact
Style Name	Compact
Surface Recommendation	Floors,Tile
UPC	722480211072 798167783262
Unit Count	1 Count
Water Resistance Level	Water Resistant
Water resistance level	Water Resistant

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