Dave Sr. from SWISCO responded:
April 13, 2016
I've seen this type of vinyl sweep before. It's like our 10-327, but the top part is not completely round while one side of it is flat. My suggestion is to install a drip rail like our 10-324. You can install it with some short screws like the 33-071, or even purchase some double stick tape at a local hardware store.
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