Can this be used to fill cracks in grout?

No this is not intended to fill cracks in grout

I'm confused. This says it is a sealer, but someone asked if it prevented mold & you said doubtful?

It's a waterproof grout colorant which, by definition, affords some degree of "sealing". As for preventing mold, surely that would require some sort of chemical content? Not sure what one can use to prevent mold on an ongoing basis except, perhaps for regular wipe downs with vinegar and water or other cleaning product.

Can it be used on swimming pool grout?

Yes GROUT PEN can be used around the pool. Be sure to check and see if the pool has grout or mortar/concrete. GROUT PEN will work on both but on mortar/concrete the coverage will be much less due to the rough and porous nature of mortar/concrete. CAP COLOR: Use the color chart (see images) for most accurate color depiction. Pen cap represents each pen's color but is not expected to be the exact shade, do a small test area first SEALED GROUT: Grout Pen may not bond to recently sealed grout. Test the grout with a few drops of water. If the grout does not absorb the water within a few minutes then the grout was likely sealed TIP MAY WEAR DOWN: Tip is made of cotton, pressing too hard will damage tip. Contact seller for replacement tips if needed SHAKE ONLY WITH CAP ON: Tip is removable and may fall out if shaken hard, only shake pen with cap on (note - Pen does not need to be shaken at all, instead gently pump tip to activate) DRY TIP: Pen needs to be primed before use, all new Grout Pens come with a dry white tip. To activate gently pump the tip (20-30 times) until fully saturated

How many square feet does one pen cover?

Honestly it varies as grouts vary in their porosity and whether it has been treated or not. The manufacturer states the 15mm pen will do up to 40 linear meters.

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Grout Pen Beige Tile Paint Marker: Waterproof Grout Paint, Tile Grout Colorant and Sealer Pen - Beige, Narrow 5mm Tip (7mL)

Grout Pen Beige Tile Paint Marker: Waterproof Grout Paint, Tile Grout Colorant and Sealer Pen - Beige, Narrow 5mm Tip (7mL)

ID del producto: 7673983

Transacción segura

Detalles

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

💧Waterproof, long-lasting ink

📏Covers up to 150 feet of grout

🖊️5mm narrow tip for precision

Descripción

✨ Refresh your grout, refresh your space — because first impressions last! 🏡

SMART SAFE USE - Designed for unsealed grout with ASTM-D4236 certification, ensuring safe, reliable results.
EFFORTLESS MAKEOVER - Skip scrubbing—instantly transform tired grout to pristine beige for a showroom shine.
PRECISION REDEFINED - Narrow 5mm tip lets you flawlessly refresh grout lines without mess or fuss.
VERSATILE APPLICATION - Perfect for bathrooms, kitchens, backsplashes, patios—anywhere grout needs a glow-up.
DURABILITY MEETS DESIGN - Waterproof, non-toxic formula ensures your grout stays vibrant and sealed against stains.

The Grout Pen Beige Tile Paint Marker by Rainbow Chalk Markers Ltd is a precision 5mm tip, waterproof grout colorant and sealer designed to cover up to 150 feet of unsealed grout. Its advanced, non-toxic, water-based formula instantly revitalizes grout lines with a clean beige finish, ideal for kitchens, bathrooms, and more. Lightweight and easy to use, it offers a quick, durable solution to grout discoloration without the hassle of scrubbing.

Presupuesto

Material	Grout Paint Pen
Brand	Rainbow Chalk Markers Limited
Style	Modern
Item Weight	25 Grams
Item dimensions L x W x H	3.74 x 0.55 x 7.48 inches
Compatible Material	Tile Grout (Unsealed)
Water Resistance Level	Waterproof
Item Form	Pen
Supported Standards	ASTM-D4236
UPC	722480211126
Unit Count	1.0 Count
Number of Items	1
Color	Beige
Surface Recommendation	Tile , Floor, Tub, Shower, Countertop, Backsplash, Sink, Wall, Patio
Manufacturer	Rainbow Chalk Markers Ltd
Part Number	GP81112
Item Weight	0.882 ounces
Product Dimensions	3.74 x 0.55 x 7.48 inches
Item model number	GP81112
Is Discontinued By Manufacturer	No
Size	Narrow Tip
Pattern	GROUT PEN
Item Package Quantity	1
Number Of Pieces	1
Special Features	Waterproof
Included Components	Grout Pen
Batteries Included?	No
Batteries Required?	No