Has anyone used this product to fill in missing grout between shower tiles? If so, is it holding up long term?

For wet areas, you need to strictly follow the instructions in order to prevent it from falling apart. Before you apply, make sure the application surface is 100% dry and clean. After you apply it, ventilate the area and wait for 24 hours. If you apply it correcty, it will stick for a longer periods

How can I remove this product from a fiberglass bathtub once it has dried? Is there a product that will aid in its removal? Thank you.

The majority of it should be wiped off an hour after using (per instructions). However, if it has dried on and you're unable to remove it with a dry rag/towel, I'd recommend scraping it off with a plastic putty knife and using something like a magic eraser or other fiberglass-safe cleanser to get the excess off.

Does it fill where grout has come out?

Hello, Good question. Yes, it does. but you may just have to use too many tubes. Thank you

How long until you can get it wet?

I waited about 12 hrs. The package says 3-4 Hours

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PentaUSA Tile Grout Repair Kit - White Grout Filler, Triple Protection, Fast Drying Formula Restores and Renews Grout Lines with Scraper (White, 8.8oz / 250gr)

Product ID: 632929821

Details

Brand
PENTAUSA
Item dimensions L x W x H
22.9 x 7.6 x
Item weight
250 Grams
Material
Acrylic
Style
Indoors

💧Waterproof & water-based

⏱️2-hour initial hardening

🛠️Squeezable premixed formula

Description

✨ Restore your grout, refresh your space — fast, flawless, and future-proof! 🏡

ECO FRIENDLY SAFE - Odorless, non-toxic, and glove-free for a family- and pet-safe home upgrade
EFFORTLESS APPLICATION - Squeezable like caulk for precise, mess-free use
VERSATILE WATERPROOF - Ideal for wet areas like showers, tubs, and pools without compromising performance
FAST RELIABLE RENEWAL - Dries in just 2 hours for quick project turnaround
TRIPLE PROTECTION FORMULA - Repairs, renews, and fills grout lines with lasting durability

The PentaUSA Tile Grout Repair Kit offers a premixed, squeezable white grout filler with a fast 2-hour initial hardening and full cure in 24 hours. Its triple protection formula repairs, renews, and fills grout lines with a water-based, waterproof, and eco-friendly acrylic formula. Designed for easy application on tiles in kitchens, bathrooms, and wet areas, it prevents staining and grime buildup while delivering a professional finish that looks like real sanded grout.

Specifications

ASIN	B08QCJYQTM
Best Sellers Rank	#23,931 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #82 in Tile Grout #176 in Flooring Products
Brand Name	PENTAUSA
Color	white
Compatible Material	Tile
Customer Reviews	4.3 4.3 out of 5 stars (2,625)
Included Components	Grout Tube, Grout Float and Manuals
Item Dimensions	22.9 x 7.6 x 5.1 centimeters
Item Form	Tube
Item Type Name	Grout Repair Kit
Item Weight	250 Grams
Manufacturer	eymen ticaret
Material Type	Acrylic
Model	ホワイト
Number of Items	1
Number of Packs	1
Part Number	850074783008
Style Name	Indoors
Surface Recommendation	Tile
UPC	781584968411
Unit Count	1 Count
Water Resistance Level	Waterproof

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