White Caulk Marker: Waterproof Silicone Colorant Paint, Stain Remover, Sink, Kitchen, Shower, Bathroom Tile - White, Wide 15mm Tip

I used this product to whiten my grout that was yellowed. It worked great. Going to buy some more.

I followed simple directions and started using the pen. After using it for a section of about 12", the pen stopped working. Nothing came out. I kept shaking and pressing on the tip, but it still did not work! After pressing down a few more times, the tip looked like it was splayed and wide and looked like I'd been using the product for 10 years. Next, much to my dismay, the tip just fell off. I figured it was the perfect time for me to see what was left inside the pen and see if I could salvage some of sealant, but it was empty! Nothing! I've requested my money back, but now I have to find a box, print a shipping label and mail it back for @ an $8 product. Seriously, I want my money back and just I want to throw it in the trash. What a joke to have me return it.

This really did freshen up the older caulk around the bathroom sink. I did end up putting on 3 light coats to really make it look good.You do have to be careful on the amount of pressure applied; I had a few puddles come out. But easy to clean up. No smell that I could tell.

Tried to clean some stained caulk with soap and water and needed something more permanent. Tried this pen hoping it would work better. It does an okay job of 'masking' the stain rather than covering it. You can still see it's stained, but it will at least look somewhat better. The pen also runs out very quickly, so buy a few if you plan on needing coverage for any area of significance.

After reading the reviews, I was concerned that the application of the product would be problematic, but it wasn't. I use paint pens for art projects, and this worked exactly the same way. You shake it up, hold the tip straight down onto a flat surface until the product flows, then apply it. It was slightly whiter than my caulking, but flowed on nicely and covered up the stains nicely!

This was bought to cover and seal a narrow strip of mold where the bath sliding door frame meets the bath tub. Theoretically it is a very good concept. In practice, the liquid did not flow easily. It covered about half the intended area, and that not very well. I gained the impression the product may be old and had dehydrated, but there was no expiry date. All told, i was not very satisfied with what is basically quite an expensive product. I would need to buy three of them to get the job done. A careful application of Kilz with a fine brush is a better solution to the problem. It has the added advantage of selecting a color that could be a better match.https://amazon.com/gp/product/B01NCJ1OMM/ref=ppx_yo_dt_b_asin_title_o00_s02?ie=UTF8&psc=1

This is easy to use. Also quite a bit of product for a small pen. Will keep several on hand for touch ups

Not easily applied,leaks out.It ruined my tile! Don' t try it,it is messy!Too small an item to pay to return.Amazon won't get involved once you buy it!A total waste of money!

Nob broke almost immediately. Very thin and runny. Very poor coverage and was only needed to freshen up white silicon. Use a pure white nail polish instead I used the Barry m in the end and it worked beautifully with one coat and lasts whilst this purchase went in the bin. Don’t waste your money.

The beading around the side of the bath is silicone. It was, like so many products, meant to be mould resistant, but has proven not to be. So this Sealant Pen looked like the perfect answer.Except, it isn't. It REALLY isn't. The instructions state that you need to shake the pen a few times, then press the nib to get the sealant going. Next, according to the instructions, you run the pen along without using pressure. Again, nonsense. Unless you apply a significant amount of pressure, the watery tippex stuff won't come out. The nib is yet another failure, in fact a total misnomer. Rather than applying the liquid, all the nib ever does is absorb the stuff back into the pen. So you give it another shake to try and get the stuff flowing, and then find out the lid has holes inside it. So when you shake the pen? Yep, the residual sealant flies everywhere. So completely contrary to the instructions, you have to force the nib back into the pen with extreme pressure to get any of the stuff out onto the silicone, then try to avoid letting the nib come into contact with the liquid so it doesn't disappear. Suffice to say, this process takes AGES.

Helps get rid of Grout stains. Makes area look newly tiled. Takes a while to apply and won't be able to do a large surface area with just one pen. But a good item for small areas

Good for a quick cover, looked brilliant when first applied. Doesn’t last through cleaning so we were back to square one next time I cleaned the bathroom! Good option if you wanted a short term cover for selling your house, but not practical past a week!

Awful. Nothing came out of this at all. Don't waste your money!