DIY Roof Renewal Heng's Makes Your RV Shine Like New

Designed for use over RV rubber roofs, at seams and tears and to seal vents, air conditioners, etc.
It is UV resistant and expands and contracts with roofs
Resists cracking and withstands impact, non-polluting and non-toxic
Available in gallon size

https://homefounding.com/product/hengs-rubber-roof-coating-white-liquid/