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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- Grout Pen Black Tile Grout Paint Marker Restorer - Narrow 5mm Tip (7mL) | Waterproof Grout Line Refresher for Kitchen & Bathroom, Colorant and Sealer Pens for Cleaner Looking Grout Lines - Black

Product ID: 10800388

Details

Brand
Rainbow Chalk
Item Weight
25 Grams
Item dimensions L x W x H
3.74 x 0.55 x
Material
Grout Paint
Style
Modern

💧Waterproof & long-lasting

🖤Deep black colorant

🖊️5mm precision tip

$20.00

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Refresh your grout, refresh your space — don’t let dull tiles hold you back!

SAFE SMART - Non-toxic, water-based ink for a clean, eco-conscious refresh
EFFORTLESS RENEWAL - Transforms dull grout into fresh, vibrant black in minutes
PRECISION REDEFINED - Narrow 5mm tip for flawless grout lines every time
UNIVERSAL APPLICATION - Perfect for bathroom, kitchen, and any tiled space craving a makeover
DURABILITY MEETS DESIGN - Waterproof formula covers up to 150 feet of grout with lasting impact

The Grout Pen Black Tile Paint Marker features a narrow 5mm tip delivering precise application of a waterproof, non-toxic, water-based black grout colorant. Designed to cover up to 150 feet of 2mm grout lines, it revitalizes grout in kitchens, bathrooms, and tiled areas with a durable, easy-to-use formula that bonds best to unsealed grout surfaces.

Specifications

ASIN	B006MCRIA0
Best Sellers Rank	#21,134 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #21 in Tile Grout
Brand Name	Rainbow Chalk Markers Limited
Color	Black
Compatible Material	Grout
Customer Reviews	4.2 4.2 out of 5 stars (6,502)
Included Components	(1) GROUT PEN - Black - Narrow 5mm Tip (7mL)
Item Dimensions	3.74 x 0.55 x 7.48 inches
Item Form	Pen
Item Weight	25 Grams
Manufacturer	Rainbow Chalk Markers Ltd
Material Type	Grout Paint
Model	GP81107
Number of Items	1
Part Number	GP81107
Style Name	Modern
Surface Recommendation	Tile , Floor, Tub, Shower, Countertop, Backsplash, Sink, Wall, Patio
UPC	722480211072 798167783262
Unit Count	1 Count
Water Resistance Level	Waterproof

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