Rain-X RX11806D Washer Fluid Additive-16.9 fl. oz, 500. ml

I usually but this stuff by the gallon, literally , but wanted to try out the concentrate to see if it works better . I paid $6.25 for the concentrate here and 4.50 for a gallon of the blue washer fluid . That's about $6 per gallon when it's all said and done . A gallon of the pre mix where I buy it is $7 regular price .That being said economically which ever one works better will be a wash and pre mixed will be slightly easier to use .Without knowing the long term difference I'm giving it 5 stars for the measuring slots on the bottle , small and easy to use tip and ergonomics of the bottle itself . Between the 3 it's easy to get the correct amount into the reservoir without spilling any.The pre mix doesn't streak my windshield at all but works great for about a month then I just do a quick wash squirt and it's protected again .The concentrate should work the same way .I'll edit this review if it doesn't .I'm using this stuff on a 25 Kona work solar glass.

I wasn't sure how well this was going to work at first. I am very happy with the results. Water just rolls off of the windshield.

Easy to use, has measurement on the side, works as expected keeping the windshield cleaner longer.

Does the job but it is hard to mix with the right ratio in the right ambient temperature. If it is freezing cold out, then you might want to mix less water, vice versa. You don't want your washer reservoir to freeze and crack the plastic hosing.

The best. Way easier then hand applying Rain-X to your windshield and works almost as well. I used to be able to find this item at any Walmart and other stores also, but in recent time stores are no longer carrying it. I hope Amazon keeps it in stock because it's the only place I can seem to find it these days!

First time getting this vs. the usual premixed ran-x product and it was a success. At least here in the SC spring/summer. Water beaded better than any premix I have had in my truck and it was able to clear off moderate road grime and bugs.It was on sale when I bought it so was a solid value proposition also (makes 4 gallons I believe).

Works great. I’ve been using this product for a couple of years now

Premixed works better for me. I mixed this with distilled water to ensure no residue, but the coating of premixed solution is not there. Price and mixing of filtered or distilled water to dilute does add much to the cost of using concentrate but when washer fluid in your car runs out, ease of use and cleaning power of premix seems better.