Gtechniq W9 Water Spot Remover for Cars, 1L | Advanced Solution Easily Removes Stubborn Water and Silica Spots from Bodywork, Suitable for Glass, All Paint Types and Vinyl

The water marks on my vehicle were tap water and the fact that the water PH was relatively high. This leaves very visible marks on the surface. This product removed them with ease.

Awesome product. Does what is says on the bottle.

It's ok at what it does, but I wonder if it's worth the money? You still need to apply a fair bit of effort to remove any water stains and I don't know if it's more effective than any other spot remover/detailer that you could use for small areas. Anyway, I've given it a try and it does work, just not sure that I'll buy it again.

Fine on new marks but didn’t make a difference to the older more stubborn ones. 2nd product I’ve tried in shower so may be my water. The info suggested it could cope with water marks.

Nothing else would touch the water spots on my black ceramic coated car this stuff worked a treat....coat still functioning as it should, highly recommend it 👍

I bought this product specifically to remove water spots from my car's windshield and windows, and it was a complete failure. I followed the instructions carefully, tried multiple applications, and even used extra elbow grease — nothing. The water spots didn’t fade even a little bit. Not only did it not work, but it also left behind streaks and a hazy film that made the glass look even worse. The smell was strong and unpleasant, and the overall experience was just frustrating. For something advertised as a water spot remover, it did the exact opposite. Total waste of money and time. I’ve had better results using homemade vinegar solutions. Don’t bother with this — it’s all hype and no results.

I left my car for like 45 days and travelled abroad, due to some water leak, it spilled on car boot and it was full bad condition. I went to polishing shop but no use. They suggested to paint as this is unremovable, I searched google and got this product, it worked like charm. As the damage was bit high, it took some time with extra power. But it worked. I highly recommend this product as it removed 100% for sure. Use micro fiber which makes it easy as well.

Works well and took all of the water marks off no problem.

Smells like straight vinegar....it works on light water spots, but i doubt it'll work on them multi layered waterspots.

Does the job! I had my detailer use it on my car and man it took all the water spot away. Its also safe to use on ceramic coated cars. Gtechniq is simply the best!

My husband's car was parked by a sprinkler, and we have very hard water, which left water spots horribly on the right side hood fender and partially on the door. I had tried vinegar and other products to try to remove it to no avail. We were told it would have to be professionally buffed out. I received this product today and used it only on the hood and the upper part of the metal between the driverside door and windshield. It completely removed the water spots!! You do have to use a little elbow grease if they are really stuck on there, aka baked on, but it worked and is totally worth the effort! I read comments prior to purchase, and the bad reviews stated it only smells like vinegar, which it does, but I can smell other chemicals in this bottle. As others have commented, this is more than glorified vinegar.

Works pretty well. My only complaint is that it's pretty expensive

My black truck had to sit outside after getting ceramic coated. I followed instructions to not wash but lightly spray off for major things like bird droppings that could not sit on the paint. After the first was nearly 3 weeks later, I realized I had a pretty significant water spotting issue. Especially on the roof. Washing and light buffing did not help. After doing a bit of research, I found Gtechniq W9 to be highly recommended by several. I'd used some of their other products and the price was right so I gave it a shot. Magic. Significant mineral deposits that were not coming off came off immediately. I let the product sit for no more than 10 seconds, wiped right off and it vanished. Amazing. Highly recommend this product.