The roof of your motor home travel trailer or fifth wheel, by itself, doesn't cause the black streaks. It's the dirt, bird droppings, and other stuff that runs off the roof during light rains and heavy dew that causes the black streaks down the side of your RV. Washing the roof just before the rains start will go a long way toward eliminating the cause of black streaks.

Washing your rig with a good wash & wax product regularly will do a lot to keep black streak stuff from the roof from building up on the sides of the rig.

If you already have a black streak problem here are a couple of products you can try.

If you have some, try WD-40 before you go out and buy something special. You'll have to wash with regular soap and water after using WD-40.

Beware of some black streak products.. they may permanently remove the gloss from the fiberglass RV. Always test a small, out-of-the-way place first. Gel Gloss will clean black streaks from most fiberglass.

Some people use common bug and tar remover. Turtle Wax makes one as do lots of other companies. Again try it on a small out-of-the-way place first.

WD-40 solvent also works well cleaning exterior and interior vinyl. Remember to wash with regular soap and water after using WD-40.

Return to Tips