
The purchase was successful and works well. It's overpriced for what it is, about $2 a foot. A simple but effective idea is to prevent water from entering the sides of your motorhome. I started installing above the windshield and then progressed to installing at the roofline between the sliding doors. This is where most of the black bands accumulate. To my delight, the black streaks are gone and all you can see is dirty drain in a small area at the end of the gutter. I would need 100ft for a 40ft RV for a full treatment so I found it expensive. However, it works well for the areas I have treated.