I just bought a new Palomino Real Lite 18 foot travel trailer and i noticed the roof covering is a thick plastic vinyl material. I see lots of sealant around the air vents and other roof attachments. Should I coat the rest of the roof in some sort of sealant as well? When i touch the edges of the roof that wrap over the edges, i can feel how flimsy the material really is. Any advice would be appreciated. Thanks.