The simple answer is: Yes, dried Silly String has the potential to ruin your car's paint and rubber seals. ... The color additives and dye in Silly String can also stain and seep into your window seals, leaving you with a bona fide mess to clean up. But clean up you shall, because you're a responsible car owner.

How do you get Silly String off car paint?

Mild Soap & Water

A thorough washing with mild car-safe soap (not dish soap) and water cures most Silly String-related ailments. Be sure to wash and detail your vehicle properly, which means using a clean sponge, clean water and an appropriate wax to seal the clearcoat.

Does Silly String stain?

Silly String is a foam-like spray product that comes in different bright colors. It's commonly used at holiday celebrations and kids' parties. While it is enjoyable and entertaining for kids, it's difficult to clean up and often leaves stains on clothes, skin and other surfaces.