Black Jack Roof Coating not sticking to Polyester Powder Coated Metal Sheets

Discussion in 'Roofing and Guttering' started by rvp, 2 Dec 2021.

  1. rvp

    rvp

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    Quicky lads,

    I have some Polyester Powder Coated Metal Sheets on my Garage and I used some Black Jack All Weather Roof Coating to basically seal a few leaks which it done very well however it seems to have 'washed' off in places but ok in others, been down maybe a year or so.

    I know it's not a permanent solution but I have a tin left so would like to use it up so my question is, is there a primer or something to make it adhere better?

    Thanks.
     
  2. rvp

    rvp

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    Any ideas people other than ripping the whole thing off and starting again! which is not an option!!
     
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  4. sxturbo

    sxturbo

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    You probably have to use a primer on the sheets as they are very smooth sheets, and the coating is kind of anaerobic so it reduces the chances of moss growing
     
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  5. rvp

    rvp

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    Do you think Bitumen and flashing primer would work? Or Zinsser 123?
     
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  7. sxturbo

    sxturbo

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    Needs to be the flashing / bitumen primer for bitumen
     
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