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Painting exterior concrete block. Min time to wait between 1st and 2nd coat?

  • 31-07-2014 9:38am
    #1
    mrcheez
    Registered Users, Registered Users 2 Posts: 14,077 ✭✭✭✭


    I'm going to get the outside wall whitewashed with Sandtex masonry paint.

    Painter reckons he can put the 2 coats on in an evening (leaving perhaps 1 1/2 hours between first and second coat).

    The tin says 3-4 hours between first and second, but I know these are generally conservative estimates to cover themselves.

    Is 1 1/2 hours enough time for first coat to work, before 2nd coat applied?

    Wall is in the shade, but well ventilated area.


Comments

  • #2
    mrcheez
    Registered Users, Registered Users 2 Posts: 14,077 ✭✭✭✭mrcheez


    Anyone?


  • #3
    game4it70
    Registered Users, Registered Users 2 Posts: 2,125 ✭✭✭game4it70


    Really depends on the weather and how porous the wall is,plus how heavy the coat is.

    Once is looks dry your ok to re-coat.


  • #4
    M.T.D
    Registered Users, Registered Users 2 Posts: 396 ✭✭M.T.D


    As stated it depends on lots of factors.

    the first coat will usually trap any stains/dirt and stabilise a surface but if you apply a 2nd coat before the first has dried enough you can get bleed through into the 2nd coat as well


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