the manufacture had recommened that i use Conap AD1147 with the silbond as a adhesion promotion, what what i had found regardless of pre work to the steel it has great bond between the PU and primer, but the primer doesnt hold onto the metal substrate, which is why i had gone to using the...
i have grib blasted and also acid etched to ensure a correct surface prep, i also MEK wash all items prior to painting primer on , i can achieve a bond from the primer to substrate but the PU is still pulling away from the primer
Hi, im currently having issues with the bonding of a cold cast MDI polyurethane, to an aluminum substrate,
i have currently been using the following primers with the results next to them
AD 1147 ( adhesion failure is a hit and miss )
Silbond / AD 1147 ( adhesion failure )
Chemlok 213 (...
