
Windshield Water Repellent 2026 Test: Which Brand Wins?
In our 2026 test 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.

Gyeon
Price shown in test: $39
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Gtechniq
Price shown in test: $20
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Gtechniq
Price shown in test: $20
Affiliate link. We may earn a commission at no extra cost to you.
The quick take
The short version of why each pick lands where it does, built straight from the measured results.
“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.”
Placed top three in 3 of 6 measurements.
Best in 2 of 6 measurements, including After Degreaser Without Blow Dryer and After Degreaser With Blow Dryer.
Best in 2 of 6 measurements, including After Degreaser Without Blow Dryer and After Degreaser With Blow Dryer.
The measured results
Every number below is read straight from the test. Products are listed in the order they finished.
Application Ease
- 1Gyeon View
took about 35 minutes to apply, similar to Gtechniq, requiring a polish step, a two layer repellent application, and a residue wipe
- 2Gtechniq
the most time consuming product to apply, about 35 minutes across three layers plus a final G2 step
- 3Glacoabout5 minutes
across two steps, described as very quick and easy
- 4Nasiol
required a little more time and effort than Rain-X, but still fairly easy
- 5Rain-X
easy to apply
- 6Meguiar's
very easy to apply, easier than Nasiol
- 7Griot's
requires a second coat, taking a bit more time than Rain-X and Meguiar's
- 8Invisible Glass
very quick and easy to apply, similar to Meguiar's
- 9Ethos Easy Glass
as easy to apply as Rain-X, about 1 minute
- 10Adam's Graphene Glass Coating
quick and easy to apply, similar to Ethos, no dwell time or multiple coats required
Slickness Friction Test
- 1Gyeon View2.9 lb
of force to slide the sponge, not very slick
- 2Gtechniq4.1 lb
of force to slide the sponge, more force required than even untreated glass
- 3Glaco1.1 lb3rd
of force to slide the sponge, third best result behind Invisible Glass and Rain-X
- 4Nasiol3.3 lb
of force to slide the sponge, better than untreated glass but far behind Rain-X
- 5Rain-X1 lb2nd
of force to slide the sponge, second best result
- 6Meguiar's1.2 lb
of force to slide the sponge, close to Rain-X
- 7Griot's1.9 lb3rd
of force to slide the sponge, third place at the time
- 8Invisible Glass0.7 lb
of force to slide the sponge, best result of all products tested
- 9Ethos Easy Glass1.5 lb
of force to slide the sponge, better than average
- 10Adam's Graphene Glass Coating2 lb
of force to slide the sponge
Initial Hydrophobic Performance
- 1Gyeon View
one of the most hydrophobic products in the first round of testing, third place finish
- 2Gtechniq
two way tie for first place with Glaco
- 3Glaco
two way tie for first place with Gtechniq
- 4Nasiol
performed as well as Rain-X initially, described as too close to call
- 5Rain-X
amazing hydrophobic qualities as soon as applied, too close to call against Nasiol
- 6Meguiar's
good but water beads did not run off quite as fast as Nasiol
- 7Griot's
possibly the most hydrophobic product at that point, very tight water beads
- 8Invisible Glass
very good, too close to call against Griot's
- 9Ethos Easy Glass
water began forming a sheet in the direct path of the spray, though beads formed once the spray stopped
- 10Adam's Graphene Glass Coating
formed a sheet of water in the direct path of the spray, though beads formed once flow stopped
After Wheel And Tire Cleaner
- 1Gyeon View0.9 seconds3rd
tied for third place with Nasiol
- 2Gtechniq0.4 seconds2nd
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
- 4Nasioljust under1 second3rd
tied for third place with Gyeon at 0.9 seconds
- 5Rain-Xabout1 second
for the water sheet to clear, described as damaged by the chemical
- 6Meguiar's1.4 seconds
- 7Griot'sabout1.2 seconds
- 8Invisible Glassabout1.2 seconds
trailing Rain-X and Nasiol
- 9Ethos Easy Glassjust over2 seconds
struggling to fend off water
- 10Adam's Graphene Glass Coatingjust over3 seconds
worst result of all products tested at that point
- 3Glaconot tested
After Degreaser Without Blow Dryer
- 1Gyeon Viewabout1.5 seconds
- 2Gtechniq0.9 seconds
in one mention and close to 1.3 seconds in another, best or near best result of all products tested
- 4Nasiol1.9 seconds
best result of all products without the blow dryer
- 5Rain-X2.3 seconds
- 6Meguiar's2.6 seconds
- 7Griot's3 seconds
one of the weaker results
- 8Invisible Glass2.7 seconds
- 9Ethos Easy Glassaround5 seconds
one of the worst results
- 10Adam's Graphene Glass Coatingaround30 seconds
worst result of all products tested
- 3Glaconot tested
After Degreaser With Blow Dryer
- 1Gyeon Viewabout0.8 seconds3rd
named in the video's final ranking as both second and third place, which appears to be a transcript inconsistency
- 2Gtechniq0.6 seconds
best result of all products tested
- 4Nasiol0.9 seconds
- 5Rain-X1.5 seconds
- 6Meguiar'sclose to2 seconds
- 7Griot'sabout2.6 seconds
- 8Invisible Glassabout2.1 seconds
- 9Ethos Easy Glassaround3.5 seconds
- 10Adam's Graphene Glass Coatingaround7.5 seconds
- 3Glaconot tested
Bug Release Test
- 1Gyeon View
tied for best result with Glaco, rating of 1.5
- 2Gtechniq
rating of two, among the second tier performers
- 3Glaco
tied for best result with Gyeon, rating of 1.5
- 4Nasiol
rating of two
- 7Griot's
rating of two
- 10Adam's Graphene Glass Coating
rating of two
- 5Rain-Xnot tested
- 6Meguiar'snot tested
- 8Invisible Glassnot tested
- 9Ethos Easy Glassnot tested
After Bug And Tar Remover
- 1Gyeon View
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
- 2Gtechniq
held first place, described as still looking as good as new
- 3Glaco
not explicitly named in the video's summary of this test, which only mentions Gtechniq and Gyeon holding first place
- 5Rain-X
lost a step, water beginning to form a sheet
- 6Meguiar's
becoming overwhelmed with water and forming a sheet
- 4Nasiolnot tested
- 7Griot'snot tested
- 8Invisible Glassnot tested
- 9Ethos Easy Glassnot tested
- 10Adam's Graphene Glass Coatingnot tested
All measurements (3 more)+
After Glass Cleaner
- 1Gyeon View
three way tie for first place with Gtechniq and Glaco
- 2Gtechniq
three way tie for first place with Gyeon and Glaco
- 3Glaco
three way tie for first place with Gtechniq and Gyeon
- 4Nasiol
two way tie for fourth place with Rain-X
- 5Rain-Xnot tested
- 6Meguiar'snot tested
- 7Griot'snot tested
- 8Invisible Glassnot tested
- 9Ethos Easy Glassnot tested
- 10Adam's Graphene Glass Coatingnot tested
After Car Wash Detergent
- 1Gyeon View
held third place
- 2Gtechniq
two way tie for first place with Glaco, described as the best looking product at that point
- 3Glaco
two way tie for first place with Gtechniq, described as looking almost as impressive as Gtechniq
- 6Meguiar's
water began puddling and forming a sheet in the direct path of the spray
- 4Nasiolnot tested
- 5Rain-Xnot tested
- 7Griot'snot tested
- 8Invisible Glassnot tested
- 9Ethos Easy Glassnot tested
- 10Adam's Graphene Glass Coatingnot tested
Overall Average Finish
- 1Gyeon View1.92nd
best average finish of all products tested, finished first or second place in every category
- 2Gtechniq2.22nd
second best average finish of all products tested, outperformed Gyeon in most individual tests
- 3Glaconot tested
- 4Nasiolnot tested
- 5Rain-Xnot tested
- 6Meguiar'snot tested
- 7Griot'snot tested
- 8Invisible Glassnot tested
- 9Ethos Easy Glassnot tested
- 10Adam's Graphene Glass Coatingnot 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.”


