by metalworker0 » Sun Oct 30, 2022 9:51 pm
SHULTZ is the crappy Bitumen based stuff, Upol is the brand leader and a million miles better product than shultz and not tar or bitumen based.
Upol is quite expensive, there are other brands similar to upol that are as good.
Beware through ,..you don't want any Bitumen product ...as it dries up and cracks within a couple of years.
Also most likely cause of the old sealer coming off , is rusting from underneath...often from and through the other side of the panel.
People often call the new products wrongly shultz and vise-versa
but both are sprayed with a shultz gun.
Paint sprayers are now using another completely different product that is not like either ..and sprays out from a double cartridge, hardener and product combining as its sprayed is made by "Wurth" I think ...and is mega expensive.
all the best..mark