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UV Protection After Headlight Restoration: Which Protectant and How Long It Lasts
Sanding and polishing a headlight is the visible part of the job. Whether the customer is still happy next summer comes down to the coat that goes on afterward. GT Tools sells two products for that step. The products vary in price and the product pages outline why, which comes down to how long the protection lasts, months vs years. This guide covers what each one claims, what each costs by the ounce, and which product is right for which job.
The Two Protectants
| Product | Size | Price | Stated protection |
|---|---|---|---|
| Stay Clear UV Plastic Protectant | 4 bottles of 4 oz | $142.80 | Up to 3 years |
| Plastic UV Protectant Spray | 8 oz | $16.00 | Months |
| Plastic UV Protectant Spray | 32 oz | $42.00 | Months |
Prices checked 30 September 2026.
Stay Clear is a wipe-on material. GT Tools states it prolongs the life of a restored surface for up to three years. The box contains four 4 oz bottles, two spout nozzles and a resealable bag, which is how a 16 oz product arrives as four separate containers rather than one.
Plastic UV Protectant Spray is sprayed on and wiped off. Its page describes months of protection, and its directions say to reapply every few months.
Those are not two grades of the same thing. One is a coating you apply once and revisit in a few years. The other is a dressing you keep in the cabinet and reapply through the season.
What Each Costs by the Ounce
The sticker prices are not comparable until the volumes are.
| Product | Volume | Price | Per ounce |
|---|---|---|---|
| Stay Clear | 16 oz | $142.80 | $8.93 |
| Spray, 8 oz | 8 oz | $16.00 | $2.00 |
| Spray, 32 oz | 32 oz | $42.00 | $1.31 |
Per ounce is the price divided by the volume. Prices checked 30 September 2026.
Stay Clear is 6.8 times the cost per ounce of the 32 oz spray. Within the spray itself, the 32 oz bottle is $1.31 an ounce against $2.00 for the 8 oz, so the large bottle is about a third cheaper per ounce.
One limit. Neither page says how many headlights a bottle treats. Without that, cost per ounce is as far as the arithmetic goes, and cost per job is something you will have to measure in your own shop.
Which One Belongs on Which Job
Use Stay Clear on customer work you are warranting with your reputation. A restoration you charged for, on a car whose owner will notice in eighteen months, is the case for the three-year material. The cost per ounce stops mattering when the alternative is doing the lens again for free.
Use the spray on volume work and maintenance. Lot cars, trade work, a fleet you see on a schedule, and any vehicle where somebody will be reapplying anyway. At $1.31 an ounce in the 32 oz bottle, it is cheap enough to use freely.
Use the spray on plastic that is not a headlight. Both products are described for headlights and other plastic surfaces exposed to UV light. Trim, mirror housings and bumper plastic do not carry the same consequence as a lens a customer looks through, and they are the surfaces where a few months of protection and a quick reapplication is a reasonable trade.
The two are not exclusive. A shop can keep the spray for general plastic and the three-year material for lenses it has just charged to restore.
Neither Works on an Unrestored Surface
Both product pages carry the same instruction: the surface must be restored before the protective material goes on. Applying either one to a lens that is still oxidized seals in what is already there.
This step should come last, after the sanding and polishing. Our guide to headlight and plastic trim restoration covers the correction work in full, from inspection through to the final polish.
These are the products that get a lens to that point:
Prices checked 30 September 2026.
If you would rather buy the sequence as one purchase, the Diamond Clear Headlight Repair Kit Professional is $630.00 and includes a polisher, pads, discs, protectant and instructions. At the other end, the Headlight Magic DIY Kit is $19.00.
Frequently Asked Questions
How long does headlight UV protectant last?
It depends which one. The Stay Clear page gives up to three years on a restored surface. The Plastic UV Protectant Spray page is written in months, and its directions say to reapply every few months. Those are the figures for the two products rather than a general claim about how long a restoration lasts.
Why is Stay Clear so much more expensive?
It is $8.93 an ounce compared with $1.31 for the 32 oz spray, which is 6.8 times as much. The pages put the difference in duration: years vs months. Whether that trade is worth it depends on whether you are protecting a lens you were paid to restore or a plastic surface somebody will wipe again in the spring.
Can I apply UV protectant to a headlight that has not been restored?
No. Both product pages state the surface must be restored before the protective material is applied. Neither product clears oxidation, and putting either one over a hazy lens seals the haze under the coating.
What size Plastic UV Protectant Spray should I buy?
The 32 oz bottle at $42.00 works out to $1.31 an ounce compared to $2.00 for the 8 oz at $16.00, so the large bottle is about a third cheaper per ounce. Buy the small one to try it and the large one once you know you will use it.
How many headlights does a bottle cover?
Neither page publishes a coverage figure, so there is no figure to give you. Track your own usage across the first several jobs and calculate your cost per lens from that.
Browse the full range in the Plastic Restoration collection, or reach the team at gtglass.com.
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