Xylene safe on fiberglass shell?

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
I'm seeing mixed online reviews for using it on fiberglass, so I'd be cautious. If you do try it, do so in a tiny inconspicuous area first. Have you tried a simple Magic Eraser or similar product? Maybe a chemical mixture that we already use in the pool like a 3:1 water/bleach mixture, or perhaps a 5:1 ratio water/muriatic acid? Many pool manufactures also have no problem with using a fine wet/dry sandpaper, something around 1,500 - 2,000 grit.

Maybe someone else with more in-depth chemical experience can confirm if it's safe or if there's another alternative available.


TFP Expert
Platinum Supporter
May 23, 2015
Tucson, AZ
Xylene is a very powerful solvent and not at all something you want to mess around with without a good pair of chemical resistant gloves. Before using that, I would try acetone first (get it pure from the hardware store paint section, DO NOT use nail-polish remover). I have cleaned fiberglass door frames using acetone to remove oils and fingerprints. If that doesn’t work, then you can try xylene but, as Pat says, do it in an inconspicuous spot first...


TFP Expert
Mar 2, 2011
Fiberglass is typically finished with acrylic, which can be dissolved with xylene. The biggest risk is probably color loss at the application site.

What exact sealer was used?