Meguiar's Headlight Protectant Review and Ongoing Longevity Test

mhphoto

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As soon as I began restoring headlights I also began searching for a solution to the problem of future oxidation. I settled on Meguiar's Headlight Protectant, not realizing that it's not exactly the best long-term solution. That said, it's performed quite admirably on my ongoing longevity test.

The product comes in a 10 ounce bottle and is available most everywhere (including Autogeek, of course). Cost is very reasonable.

I'm not sure exactly how unique this product is compared to all the other plastic "protectants" and synthetic waxes on the market, but I can say I haven't been disappointed in its performance so far.

To use the product, shake well, apply to plastic surface, wipe off before drying, buff gently, enjoy the residual smell. Yes, it smells very pleasant—slightly chemical, sweet fruit. Quaffable, most certainly…

Not much product is needed, and it can be applied with almost anything you have on hand at the time.

The purpose of this product seems to be preventative rather than the purpose it's currently serving for me—as a protectant for raw polycarbonate exposed by stripping the lens of the degraded clear coat. I can see this product being an excellent hedge against oxidation for new car owners wanting to stave off the inevitable.

On to the test.

I restored three cars' lights to test this product with the intent to test the efficacy of the product using three different reapplication intervals:
- 1999 Honda Civic, reapplication once every week
- 2003 Honda Accord, reapplication once every month
- 2002 Hyundai Elantra, one application only, right after restoration

All three cars are parked outside 100% of the time. It's only been one month since first application on all cars, but remember that this is an ongoing test, not just a one-off review. So, at least at the one month mark, all lights are still crystal clear.

Civic:

IMG_8253-Version2.jpg


IMG_8257-Version2.jpg


IMG_8265-Version2.jpg


Slight sanding marks I need to take off.

IMG_8273-Version2.jpg


Accord (FYI, these picture were underexposed and required extensive editing, so the lenses do look a bit cloudy, but that's just a byproduct of getting a usable picture, not in the actual lens itself):

IMG_8283-Version2.jpg


IMG_8292-Version2.jpg


I'll have to get some shots of the Elantra, but the owner says they're still looking great. I'm now using OC2 to coat restored lights, but I still plan on using this product quite a bit for extra protection and hedging against future oxidation.

Also, public thanks to Ray6 for sharing his wealth of headlight knowledge with the forum. :thankyousign:

More updates in the coming months. :xyxthumbs:
 
Thanx for doing this test...been curious since 'its' introduction.

Bill
 
It would be interesting to know how this product is different from other waxes and sealants, i.e. what makes it a specific headlight sealant, and how often it needs to be reapplied to keep it working.
 
Nice job on the headlights and great photos.
ray6
 
What would you recommend for a brand new vehicle? I just bought a '12 Ram and it sits outside 100%. I also have a new patrol car that sits out 100% and I'm trying to figure what I can use to keep them clear. I wax on a very regular basis on both vehicles. Will that be enough? Any advise would be awesome.

Sorry to thread jack if I did. This was the closest articale I could find on the subject.
 
What would you recommend for a brand new vehicle? I just bought a '12 Ram and it sits outside 100%. I also have a new patrol car that sits out 100% and I'm trying to figure what I can use to keep them clear. I wax on a very regular basis on both vehicles. Will that be enough? Any advise would be awesome.

Sorry to thread jack if I did. This was the closest articale I could find on the subject.

Hey there. Funny you should comment on this thread. I was just about the update it. I just replied in the thread you started, but basically just two choices:

1) Diligent monthly applications of a synthetic sealant or wax. I use Meguiar's Headlight Protectant. They (Meguiar's) say that while there's no set date for how long its protection will last because of all the variables, you can expect about 2-3 months.

or,

2) Opti-Coat the lenses. And for even more protection on top of that use whatever sealant you decide on every month (after the OC has cured, of course).

Now for the update.

I saw my friend's 2002 Elantra and was let down a bit. After I restored them (thread here) I coated them with Meguiar's Headlight Protectant. This car was to be my baseline, one application test subject. The passenger side's lens is still in good shape and shows little if any change over when I restored it. But the driver's side has already begun to fog up again.

IMG_20120808_180549-Version2.jpg


(Not my TOGW, by the way ;) )

The span between when I restored it and when I snapped this pic (with my phone, sorry about the quality) was 44 days.

Remember, this car, like the other two in the test (which are doing fine, by the way; I'll try to get some pics up soon) are all parked outside 100%.
 
Other cars are still perfect! Looks like the magic frequency is at least once a month, better yet twice a month.
 
Hi there,

Anyone can tell me proper way to apply the headlight protectant?
I used Menguair's Headlight Protectant lately after see this post but what happen is that this product had makes my headlight turns worse than it originally is. (My headlights is originally clear. Only that one of it looks like losing the coating layer)

Just after the application, my headlight looks exactly like the picture. But, it looks like when it turns dry, it left a layer of white residue on top of my headlight and it is really horrible.

I am not sure what I did wrongly - I tried twice but both times turns out to give same result. I have doubt if the buff caused to problem.... how to buff actually? :'(

To use the product, shake well, apply to plastic surface, wipe off before drying, buff gently, enjoy the residual smell. Yes, it smells very pleasant—slightly chemical, sweet fruit. Quaffable, most certainly…
 
^^Powerlock is great, but you're not getting two years from it.

Opti lens is the only thing that will give permanent long term protection.

Great post and breakdown OP. nice job!
 
^^Powerlock is great, but you're not getting two years from it.

Opti lens is the only thing that will give permanent long term protection.

Great post and breakdown OP. nice job!

^ That is why I made sure to say "the back of the bottle"

I have learned to dot my I's and cross my T's
 
But, it looks like when it turns dry, it left a layer of white residue on top of my headlight and it is really horrible.
(

That's sort of what I've come to notice after using it on the new Kia.. I had been wondering what it was about the way they looked, but it wasn't until a close inspection under the right lighting that I finally saw the slight residue that seems impossible to fully buff off when applying the stuff.

Now all I want to do is safely remove it. I've tried D120@10:1 but it didn't completely remove it. I'm not trying to rush into it because the last thing I want to do is make the mistake of being too aggressive and somehow remove any of the original UV coating on the headlights.

What would be the best and safest way to remove Meguiars Headlight Protectant?
 
That's sort of what I've come to notice after using it on the new Kia.. I had been wondering what it was about the way they looked, but it wasn't until a close inspection under the right lighting that I finally saw the slight residue that seems impossible to fully buff off when applying the stuff.

Now all I want to do is safely remove it. I've tried D120@10:1 but it didn't completely remove it. I'm not trying to rush into it because the last thing I want to do is make the mistake of being too aggressive and somehow remove any of the original UV coating on the headlights.

What would be the best and safest way to remove Meguiars Headlight Protectant?

It will be gone in a few weeks. Just let it fade over the next 6-8 weeks. It's a wipe on wipe off application. No need to let it sit long as it will be a pain to remove. Working in small areas works best instead of the whole headlight.
 
It will be gone in a few weeks. Just let it fade over the next 6-8 weeks. It's a wipe on wipe off application. No need to let it sit long as it will be a pain to remove. Working in small areas works best instead of the whole headlight.

I never let it sit long. Wipe on, buff off. But it's not easy getting it to completely buff off. Even if it looks clear there's a bit of haze that will remain, that's what I'm dealing with. And that haze doesn't just fade away.. It's like a thin layer of dried up sunscreen [best way I can describe it]

And it's because of that thin film of residual haze that the headlights actually look worse than new after using this stuff.
 
I never let it sit long. Wipe on, buff off. But it's not easy getting it to completely buff off. Even if it looks clear there's a bit of haze that will remain, that's what I'm dealing with. And that haze doesn't just fade away.. It's like a thin layer of dried up sunscreen [best way I can describe it]

And it's because of that thin film of residual haze that the headlights actually look worse than new after using this stuff.

Then buff it off either by hand or machine with a light polish. It is possible that some defects are on the inside of the headlights. Like removes like as well.
 
PlastX wil take it off really quickly by hand. 5 seconds and you'll be crystal clear.
 
PlastX wil take it off really quickly by hand. 5 seconds and you'll be crystal clear.

And it's not abrasive?

What about IPA? What would be the correct dilution to safely and effectively remove this?
 
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