2026 test10 productsCar Care & Detailing
Which Windshield Water Repellent Brand Wins?
We compared 10 windshield water repellent options head to head. Gyeon came out on top. See the measured results, the runner-up, the budget pick, and a link to the full test video.
Winner
Gyeon
Price shown in test: $39
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Runner-up
Gtechniq
Price shown in test: $20
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Budget pick
Gtechniq
Price shown in test: $20
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The measured results
Every number below is read straight from the test. Scroll sideways to see all measurements. Products are listed in the order they finished.
| Product | Application Ease | Slickness Friction Test | Initial Hydrophobic Performance | After Glass Cleaner | Bug Release Test | After Car Wash Detergent | After Bug And Tar Remover | After Wheel And Tire Cleaner | After Degreaser Without Blow Dryer | After Degreaser With Blow Dryer | Overall Average Finish |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1Gyeon View$39 | took about 35 minutes to apply, similar to Gtechniq, requiring a polish step, a two layer repellent application, and a residue wipe | 2.9 lb of force to slide the sponge, not very slick | one of the most hydrophobic products in the first round of testing, third place finish | three way tie for first place with Gtechniq and Glaco | tied for best result with Glaco, rating of 1.5 | held third place | tied for first place with Gtechniq according to the video's summary of this test, though this appears to conflict with the prior test's three way tie including Glaco | 0.9 seconds, tied for third place with Nasiol | about 1.5 seconds | about 0.8 seconds, named in the video's final ranking as both second and third place, which appears to be a transcript inconsistency | 1.9, best average finish of all products tested, finished first or second place in every category |
| 2Gtechniq$20 | the most time consuming product to apply, about 35 minutes across three layers plus a final G2 step | 4.1 lb of force to slide the sponge, more force required than even untreated glass | two way tie for first place with Glaco | three way tie for first place with Gyeon and Glaco | rating of two, among the second tier performers | two way tie for first place with Glaco, described as the best looking product at that point | held first place, described as still looking as good as new | 0.4 seconds, best result of all products tested; also referenced elsewhere in the transcript as 0.7 seconds for second place, which appears to be a transcript inconsistency | 0.9 seconds in one mention and close to 1.3 seconds in another, best or near best result of all products tested | 0.6 seconds, best result of all products tested | 2.2, second best average finish of all products tested, outperformed Gyeon in most individual tests |
| 3Glaco$45 for both the cleaner and the product | about 5 minutes across two steps, described as very quick and easy | 1.1 lb of force to slide the sponge, third best result behind Invisible Glass and Rain-X | two way tie for first place with Gtechniq | three way tie for first place with Gtechniq and Gyeon | tied for best result with Gyeon, rating of 1.5 | two way tie for first place with Gtechniq, described as looking almost as impressive as Gtechniq | not explicitly named in the video's summary of this test, which only mentions Gtechniq and Gyeon holding first place | not tested | not tested | not tested | not tested |
| 4Nasiol$10 | required a little more time and effort than Rain-X, but still fairly easy | 3.3 lb of force to slide the sponge, better than untreated glass but far behind Rain-X | performed as well as Rain-X initially, described as too close to call | two way tie for fourth place with Rain-X | rating of two | not tested | not tested | just under 1 second, tied for third place with Gyeon at 0.9 seconds | 1.9 seconds, best result of all products without the blow dryer | 0.9 seconds | not tested |
| 5Rain-X$8 | easy to apply | 1 lb of force to slide the sponge, second best result | amazing hydrophobic qualities as soon as applied, too close to call against Nasiol | not tested | not tested | not tested | lost a step, water beginning to form a sheet | about 1 second for the water sheet to clear, described as damaged by the chemical | 2.3 seconds | 1.5 seconds | not tested |
| 6Meguiar's$13 | very easy to apply, easier than Nasiol | 1.2 lb of force to slide the sponge, close to Rain-X | good but water beads did not run off quite as fast as Nasiol | not tested | not tested | water began puddling and forming a sheet in the direct path of the spray | becoming overwhelmed with water and forming a sheet | 1.4 seconds | 2.6 seconds | close to 2 seconds | not tested |
| 7Griot's$15 | requires a second coat, taking a bit more time than Rain-X and Meguiar's | 1.9 lb of force to slide the sponge, third place at the time | possibly the most hydrophobic product at that point, very tight water beads | not tested | rating of two | not tested | not tested | about 1.2 seconds | 3 seconds, one of the weaker results | about 2.6 seconds | not tested |
| 8Invisible Glass$15 | very quick and easy to apply, similar to Meguiar's | 0.7 lb of force to slide the sponge, best result of all products tested | very good, too close to call against Griot's | not tested | not tested | not tested | not tested | about 1.2 seconds, trailing Rain-X and Nasiol | 2.7 seconds | about 2.1 seconds | not tested |
| 9Ethos Easy Glass$33 | as easy to apply as Rain-X, about 1 minute | 1.5 lb of force to slide the sponge, better than average | water began forming a sheet in the direct path of the spray, though beads formed once the spray stopped | not tested | not tested | not tested | not tested | just over 2 seconds, struggling to fend off water | around 5 seconds, one of the worst results | around 3.5 seconds | not tested |
| 10Adam's Graphene Glass Coating$33 | quick and easy to apply, similar to Ethos, no dwell time or multiple coats required | 2 lb of force to slide the sponge | formed a sheet of water in the direct path of the spray, though beads formed once flow stopped | not tested | rating of two | not tested | not tested | just over 3 seconds, worst result of all products tested at that point | around 30 seconds, worst result of all products tested | around 7.5 seconds | not tested |
How it was tested
- ease of application
- friction and slickness test using a weighted sponge and push pull force meter
- initial hydrophobic water repellency performance
- hydrophobic performance after glass cleaner
- bug guts release test using windshield washer fluid and a squeegee
- hydrophobic performance after car wash detergent
- hydrophobic performance after bug and tar remover
- chemical resistance and water runoff time after wheel and tire cleaner
- chemical resistance and water runoff time after degreaser, with and without a blow dryer simulating highway speed airflow
“the Gyeon came out on top with an average finish of 1.9. It finished in first or second place in every category of testing.”