mrwall1 wrote:
I'm a painter by trade... Aluminum and galvanized and stainless steel are non porous... so paint does not have anything to grab onto, bare sheet metal is up in the air... some think a good metal primer will hold others don't... so to be safe I always etch it.... Etching is a chemical reaction that gives the paint something to stick to.... there are some wipe on etches.... and some DE glossers that can work, some painters say wiping it with vinegar will etch it.... but I like an industrial etch that is made for that purpose, Sherwin Williams ( might have to order it for you) carries a product called DTM Prime Wash... and that is what I used....it is an acid based coating... if I was using it on aluminum I would go to an industrial paint store and get one that is 2 parts... and Sherwin Williams says their krill primer will work as an etch... it is acrylic based... but I just wanted to make sure I had no paint failures... Then I primed the roof with Dicor.. metal primer acrylic base ... The eternabond tape is a silicone based tape to put over the seams... it alone without ever coating your whole roof would probably make it so it would never leak! but I want the cooling effect also, so I am going to put the dicor elastomeric roof coating over top of everything ( 2 coats )
Allright, so I found everything online.
This sound about right? (I have an aluminum roof)- Sherwin Williams DTM Wash Primer - 2 parts ( I couldn't find the price online.)
My trailer is 7x16 like yours, how much of this did you buy? And how much is It generally?- Docor Primer - $79.93 1 Gal
This says for metal, will it work for Aluminum?- Dicor Roof Coating Elastometric 1 GAL - $35.84
- Eternabond 4'' x 10' roll, $17.48
If the DTM Wash Primer is 100 bucks, it would cost about $233.25 to protect the roof. I think this is worth it for no trouble later down the line.
Thanks for the info.