We all know the sun can be brutal. Too much exposure to UV rays doesn’t just leave you with a painful sunburn—it also raises the risk of skin cancer. That’s why sunscreen is a must-have for any pool day. Keeping your family protected should always come first.

But here’s something most pool owners don’t realize: the sunscreen you’re using could be quietly damaging your vinyl pool liner.

The Surprising Test Results

To see how different sunscreens interact with vinyl liners, samples were tested under extreme conditions—coated with sunscreen and left in a 110°F environment for up to 24 hours.

The results? Eye-opening.

• Some sunscreens caused significant damage to the liner’s printed surface
• Others led to minor wear and fading
• A few had no visible impact at all

What’s Causing the Damage?

The biggest culprits were sunscreens packed with certain chemical ingredients—especially:

• Phenoxyethanol (also known as Ethylene Glycol Monophenyl Ether or similar variants)
• Octocrylene

These chemicals were far more likely to break down or discolor the liner’s pattern over time.

A Safer Alternative

Here’s the good news: mineral sunscreens showed zero damage in testing. That makes them a pool-friendly option if you want to protect both your skin and your liner.

What You Can Do

Before your next swim:

• Take a quick look at your sunscreen’s ingredient list
• Avoid products with the chemicals mentioned above when possible
• Consider switching to a mineral-based sunscreen

A small change in your sunscreen choice can go a long way—helping you enjoy the sun safely without sacrificing the look and lifespan of your pool liner.