How to reseal headlights

Sometimes, no matter how often you clean your headlights, they just don’t seem to shine like they used to. This can be due to a number of things, but one possibility is that the seal around your headlights has worn away, allowing moisture and dirt to get in and dull the headlight’s surface. If this is the case, don’t worry – resealing your headlights is a relatively easy process that you can do at home with just a few materials.

Can you apply sealant to headlights?

Reseal headlights

To enhance the long-term appearance of your headlights, apply a coat of sealant, such as JetSeal. This will prevent UV rays from entering the plastic and causing it to oxidize or fracture. Such products can be found at most auto-parts stores. Drivers can choose to apply the sealant with a brush or cloth, but many aeros prefer to use their finger for better accuracy.

What sealant is used to seal headlights?

Diode Dynamics Butyl Headlamp Sealant is specifically designed for automotive headlight assemblies, which makes it a great choice to reseal headlights. With some practice, you’ll have a weather-tight seal that will last against moisture ingress for years with this high-quality butyl! Some other brands like 3M, Permatex, and Sylvania also offer headlight sealants that work just as well.

Can you use silicone to reseal headlights?

Be sure to apply a consistent bead of silicone sealant across the entire headlight. The last step in sealing a headlight or taillight is to make sure that the silicon has adhered well to both surfaces it is meant to seal. This can be checked by looking for any gaps or bubbles in the seal. If you’re not confident in your ability to apply sealant evenly, you can also use silicone tape, which is specifically designed for creating water-tight seals.

How do you open and reseal a headlight?

Because headlights are glued shut with a sealant, they can be tricky to open. However, you won’t need many tools or an oven if you want to break the seal around the housing. Just use low heat and handle the headlight delicately, and it should pop right open without sustaining any damage. This will give you access to the bulbs so you can replace them if necessary.

To reseal your headlights, use a clear silicon sealant. You’ll need to apply it around the perimeter of the light, making sure that there are no gaps. Once it’s in place, press the two halves of the headlight together and hold for a few seconds until the sealant sets. Wipe away any excess sealant with a damp cloth, and you’re all done!

How much does it cost to reseal a headlight?

The price for this process ranges from $20 to $190, depending on if it’s done by a professional or the driver with a do-it-yourself kit. Also, if you use a sealant that is not intended for headlights, it can damage the lens and cause premature yellowing. Therefore, we recommend using a clear silicon sealant specifically made for headlights. You can find these at most auto parts stores.

Can you seal headlights with wax?

As a further safeguard, you may apply wax to the headlight to assist prevent future corrosion. One technique suggests using bug spray to get rid of the foggy appearance. However, unless you want the plastic to permanently harm you, don’t use this approach. It’s also highly flammable, so it’s not the safest idea.

Reseal headlights

How do I seal my headlights after polishing?

The polishing process will remove the top layer of the headlight’s UV coating. This exposes a new layer of the UV coating, which is then susceptible to yellowing and hazing. Resealing your headlights will help to protect them from these elements and keep them looking clear and bright.

Apply a layer of Carnauba wax to your car’s paint after polishing it for extra protection. The same goes for plastic or acrylic headlight lenses – a clear coat will stop damage and UV rays from harming the surface. You can buy a headlight sealant kit from your local auto parts store. These usually come with two cans of sealant and a UV protection agent. Follow the instructions on the kit to apply the sealant properly.

If you don’t want to buy a kit, you can make your own headlight sealant by mixing together equal parts of clear nail polish and white vinegar. Apply this mixture to your headlights with a cotton ball and let it dry. The vinegar will act as a mild abrasive to help remove any remaining hazing, while the nail polish will provide a protective barrier against UV rays and other elements.

Can I put JetSeal on headlights?

To give your headlights a long-lasting coat of protection, apply JetSeal over the top. This will keep UV light from permeating the plastic and oxidizing it, causing it to fracture. This material also contains a Carnauba wax that will give your headlights extra shine and protection from road debris.

To apply JetSeal, simply spray it on and wipe it off with a clean microfiber cloth. Make sure to apply a thin, even coat to avoid any streaking. Give the product time to dry before driving or washing your car. You can find JetSeal at most auto parts stores, or online. Expect to pay around $15 for a small bottle.

Is Turtle Wax good for headlights?

There are many ways to clean plastic lenses, but using a product like Turtle Wax Headlight Lens Restorer Kit is the best way to restore dull yellowed headlights and protect them from future yellowing. Your car’s headlights are constantly exposed to UV rays, which cause them to yellow and haze over time.

Turtle Wax Headlight Lens Restorer Kit comes with everything you need to clean and protect your headlights. The first step is to clean the lenses with the included headlight cleaning solution. This will remove any dirt, grime, or debris that’s on the surface. Next, use the polishing pad and headlight restoration compound to remove any yellowing or hazing. Finally, apply the included UV sealant to protect your headlights from future damage.

What will Flex Seal not stick to?

The Flex Seal Liquid is compatible with most materials, including metal, but not silicone. Moreover, it will not adhere to glass, so be careful using it on your car windows. It’s easy to reseal your headlights with Flex Seal Liquid. Just clean the surface, apply the Flex Seal Liquid, and let it dry. You’ll have a new seal that will keep your headlights looking great for years to come.

Is Flex Seal just silicone?

Flex Seal and Flex Shot might both stop leaks and fill cracks, but you should use them for different purposes depending on what exactly you need. This is because Flex Seal is not just silicone, but a specially formulated liquid rubber coating. On the other hand, Flex Shot is pure silicone, making it better for sealing than Flex Seal.

Does Flex Seal work like caulk?

Caulking your surface may appear difficult at first, but Flex Shot is on hand to make it a lot simpler. This thick rubber sealant is easy to apply; you only need a caulking gun if the job demands one. When a motorist uses Flex Shot to reseal their headlights, they are creating a stronger seal than what caulk alone can provide.

Reseal headlights

Can you put sealant over sealant?

You should avoid caulking over old silicone sealant as it’ll more than likely be ineffective in solving the problem. Plus, it creates an eyesore that will be difficult to remove later on. However, if you absolutely must apply new sealant over old silicone, make sure to clean the area first with rubbing alcohol. This will help the new sealant adhere better to the surface.

What is butyl sealant?

Butyl sealants are plastic sealants made of elastomer-based polyisobutene that creates a strong bond and does not degrade over time, making it ideal for long-term projects. Thus, it is commonly used for headlight and taillight restoration.

To reseal headlights with butyl sealant:

  1. Clean the surface of the headlight with rubbing alcohol to remove any dirt or debris.
  2. Apply a generous amount of butyl sealant around the perimeter of the headlight.
  3. Use a hairdryer to heat up the area where you applied the sealant. This will help the butyl sealant bond better to the surface.
  4. Allow the area to cool and cure for 24 hours before driving your car.

Is butyl better than silicone?

Butyl and silicone caulk have their uses in a variety of DIY projects throughout the house, with silicone being better suited for smooth interiors and butyl providing greater adaptability, making it an excellent exterior caulk. Therefore, it really depends on the project you’re working on as to which caulk is better.

If you have an old headlight that’s starting to yellow and fog up, you can reseal it with either butyl sealant or silicone. Butyl sealant is a plastic sealant made of elastomer-based polyisobutene that creates a strong bond and doesn’t degrade over time, making it ideal for long-term projects. Silicone, on the other hand, is better suited for smooth interiors and provides a great seal against water. Therefore, it really depends on the project you’re working on as to which caulk is better.


Is butyl rubber a silicone?

Rubber has been combined with a variety of materials to broaden its applications. Butyl rubber is made up of isobutene-isoprene, while silicone is formed from polysiloxane, which includes both organic and inorganic components.

Does silicone caulk stick to old silicone?

It’s best to get rid of any old silicone. While new, freshly applied silicone may be used and will adhere to old silicone; the connection isn’t as strong as if it were applied to a clean surface. In case you’re wondering, the same goes for latex caulking.

Are all silicone sealants waterproof?

Silicone sealants that are pure silicone will not become paintable. They maintain their flexibility in a variety of temperatures, remain waterproof, adhere to most surfaces well, and won’t promote mildew growth – some even have specific bacteria resistance capabilities like Dowsil 785+.


Resealing headlights is a simple and easy way to prolong the life of your headlights and keep them looking clear and bright. When resealing headlights, you can use either butyl sealant or silicone. Butyl sealant is a plastic sealant made of elastomer-based polyisobutene that creates a strong bond and doesn’t degrade over time, making it ideal for long-term projects. Silicone, on the other hand, is better suited for smooth interiors and provides a great seal against water. Therefore, it really depends on the project you’re working on as to which caulk is better.

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