awning

We purchased a new awning last September, didn't use it until this year. Because of the way it is manufactured (with a seam running the width of it, about 6 inches out from the camper) it leaks every time we have rain. The manufacturer says it's supposed to leak!!!! But it should seal itself in time as dirt accumulates in the needle holes. In the meantime, they suggested I run paraffin wax along the seam. I am flabbergasted that they realize the awning leaks, and they're okay with that!! Has anyone else experienced this?