I've used several quarts of Heng's Rubber Roof Coating, with both blue and orange labels.
All with excellent results for the last 15 years. No lifting, peeling, or flaking of the product. Just make sure your roof is dry and with a simple brushing or cleaning, you are good to go.
There are several types of RV roofing material. Do your research and find out what type you have, then you can pick the maintenance product for your roof.
Link to Heng's Rubber Roof Coating: https://amzn.to/3S9W661

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