[QUOTE=stevej;1689899]Or just go to a ally trailer and never worry about it again
get a rubber bung drill a hole through it for a hose and use a pressure pump to fill the whole void
have used fish oil. Sump oil tectly and all manner of products
all work to some degree
I've seen a bloke completely cap all his SHS section trailer, pump it full of sump oil, and declare it would last forever. Some years later, I kept a straight face when it rusted out from the inside, bottom of the section. He hadn't allowed for the fact that oil is lighter than water. Who'd a thunk that? So the small amount of saltwater that invevitably snuck in sat on the bottom, happily rusting through when it was sitting quietly.
[QUOTE=ranmar850;1689982]just meant to use that method to get a good seal when putting what ever liquid in there to make sure it’s full
saves taping the gal and removing material if trying to add a screw-in metallic bung
dint think anything is foolproof with saltwater used boats
even my new ally trailer has all gal fittings with no seperation and gal biting into ally
maybe not rust but dissimilar metal issues going to occur at some point
Denso tape is very good within its prescribed uses, applied properly. We used it widely for all hydraulic fittings on the fishing boats, anything that needed salt water kept off. I have it wrapping up the drum winch motor on my boat, and the electric capstan drive motor, and their associated electrical connections. However, if water can find a way in, it then has the reverse effect, as it traps it inside. I've seen some horrible messes.
But the funniest one was with a mate, who hit on the "idea" of wrapping his boat trailer springs up to " stop them rusting" . He rreally didn't give any though to the fact that springs flex, and open up gaps, and the resultant water trapping inside had those springs worse off than leaving them bare. Parts of them were almost effectively immersed in salt water, full time. . I don't know if I would want to try to wrap an entire trailer.