GroutGloWaterproof Grout Pen for Bright White Tile
End of Summer Sale ends Sunday, Aug 30
Ships by Sat, August 29
30 days
Money-back guarantee
Free
Tracked USPS shipping
73,500
Happy customers
The End of Summer Sale
Everything below is marked down until Sunday, Aug 30. The more you add, the more you save — it comes off automatically, on top of the sale price.
10%
2 items
15%
3 items
20%
4 items
Bright white grout in one stroke
You scrub. You bleach. You scrub again. And the grout still looks dirty.
It's the one thing that makes your bathroom look old — no matter how clean the rest is.
The GroutGlo pen paints over years of yellow stains, mold marks, and grime in a single stroke — locking in bright white with a nano-seal that stays put through 730 days of showers.
No scrubbing. No mess. Works right out of the package.
Tested through 1,100 scrub cycles and still bright white
✓ One stroke covers years of stains
The 2mm precision tip glides over yellowed, moldy grout and locks in bright white in seconds. No primer, no scrubbing, no second coat.
✓ Stays white through 730 days of showers
Nano-seal formula blocks out water, steam, and soap. Pressure-tested at 80 PSI so daily hot showers won't wash it off.
✓ Works on every tile in your home
Kitchen counters, shower walls, floor grout, sink edges, even caulk seams. One pen, every room — no contractor needed.
✓ Safe to use around food and family
Low-odor, non-toxic formula dries smudge-free in 3 hours. Breathe easy while you work — no harsh chemicals lingering after.
✓ The $19 fix that looks like a full re-grout
Skip the $400 contractor quote. One pen restores an entire bathroom and leaves it looking brand-new for years.
What you get today
- GroutGlo waterproof grout pen (1 pen)
- 2mm precision tip — fits the narrowest grout lines
- 730-day waterproof nano-seal coverage
- Works on tile, caulk, ceramic, metal, wood
- Free tracked shipping
- 30-day money-back guarantee
Seasonal production run — once this batch sells out, restock pricing may change.
A quick way to make your tile look brand-new before the holidays — limited stock available.
30-day at-home trial
Try GroutGlo at home for 30 days. If it doesn't deliver the intended result or isn't as easy to use as described, return it for a full refund.
How long does it really stay white in a shower used every day?
Up to 730 days based on standard pressure testing. Most users see clean white grout for well over a year of daily use before any touch-up is needed.
Can I use it on colored grout, not just white?
Yes — it comes in white, black, gold, and silver. Pick the color closest to your existing grout, or use white to fully refresh older stained grout.
Do I need to prep the grout before applying?
A quick wipe with a dry cloth is enough. No special primer, no sanding, no scrubbing needed first.
Will it stain the tile if I go outside the line?
No — wipe any overspill off the tile within a minute and it cleans up easily. The nano-seal only bonds permanently to porous grout, not glossy tile.
- Wipe the grout line with a dry cloth to remove loose dust.
- Shake the pen for 30 seconds, then press the tip down a few times to start the flow.
- Run the tip along the grout line in one smooth stroke.
- Let dry for 3 hours before getting it wet.
- Size: 5.7 x 0.8 in
- Material: Metal shell, oil-based waterproof ink
- Tip: 2mm precision tip
- Lasts: Up to 730 days waterproof per application
Every order is covered by our 30-day guarantee, starting the day your order arrives. Many issues are solved without sending anything back — damaged, wrong, or ill-fitting items are typically replaced free.
No extra taxes or shipping charges. What you see is what you pay.
Your order is dispatched within 24–48 hours and typically arrives within 5–9 business days. You'll get a tracking link the moment it ships, so you can follow it door to door.
Ordering from outside the US? Allow 7–10 business days.
