In typical rv construction siding and roof sheeting edges are simply butted together and fastened to the frame usually just with staples.
Caulking rv corners.
Since filming this vid.
First make sure that there is no rain or snow when you re caulking.
Look for the cracks and holes on the roof and then pull out your caulking gun.
A use masking tape to mask 1 4 from the caulk joints b apply white geoflex or dyco 20 20 caulking c use a wet finger to spread the caulk spray your finger with a 50 1 water dish soap mix d while the caulk is still wet remove the masking tape.
A strip of rv putty is laid over the joint and the trim is screwed on.
After that clean your rv with water and soap.
As time goes by the putty gets squeezed out the black dirty stuff oozing around corners and window trim for example.
Look everywhere there is a seam like at the corner of your slide outs where the air conditioner and ceiling vents come out of the roof at the windows etc.
Put the rv roof caulk into the gun and cut the tip off the tube of the caulk.
The only way to do a professional caulk job on your rv not the roof but the sides is to.
Just follow these rv caulking tips.
Just make sure to check your seals often and replace the caulk when it needs replacing.
In this rv diy video host mark polk with rv education 101 demonstrates how to reseal rv corner molding using seal tite corner seal.
Demonstration video how to caulk an rv in the real world.
Dry off the water thoroughly.