Symptoms
- Small or large bubbles visible under the tint film
- Edges of the tint lifting or peeling away from the glass
- Purple or faded discoloration in older tint
- Reduced visibility through the affected window
Likely causes
- CommonAge and UV exposure breaking down the adhesiveMost tint films have a lifespan of many years before the adhesive starts to fail, especially in hot, sunny climates.
- CommonPoor-quality tint film or installationCheaper dyed films are more prone to bubbling and fading than higher-quality ceramic or metalized films.
- PossibleExposure to extreme heat (like a defroster on the rear window)Rear window tint over defroster lines can be more prone to lifting from repeated heat cycling.
- Less commonImproper cleaning products used on the tintAmmonia-based cleaners can degrade tint film and its adhesive over time.
What to do
- Avoid using ammonia-based glass cleaners on tinted windows, since they can accelerate adhesive breakdown.
- Note that small bubbles typically don't get better on their own and will spread over time.
- Check your local laws on window tint darkness and reflectivity before choosing a replacement film, since these vary by state and window position.
- Have the old tint professionally removed, since DIY removal often leaves adhesive residue that's hard to clean off cleanly.
- Choose a quality tint film for the reinstall, since it will last considerably longer than a cheap option.
- Avoid rolling down freshly tinted windows for the manufacturer's recommended curing period, often several days.
Tools and parts
Window tint film (professional installation recommended)Search: “window tint film legal limit for [state]”
When to call a pro
This is best left to a professional tint shop, since clean removal and a bubble-free, legal reinstall require specialized tools and film.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.