Sealant/Putty on a Polycarbonate/Aluminium framed Greenhouse?

Discussion in 'Greenhouse Growing' started by Grum Tum, Mar 12, 2019.

  1. ricky101

    ricky101 Total Gardener

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    Never tried Limewash, but happily use the Vitax Summer Cloud Greenhouse Shading about £5-6 in garden centers etc.

    Goes on very easily with a big soft paintbrush and stays on all year, but just rubs off easily with a duster etc .
     
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    • pete

      pete Growing a bit of this and a bit of that....

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      I'd use the neutral cure silicone on polycarbonate, it sticks better and if you use the low modulus it allows for greater expansion and contraction.
      It can be a pain to remove if you get it where you dont want it.
      The acetic cure one, I find doesn't stick that well to plastics.
      Its not really a glazing silicone, more for sealing around baths and kitchens, sticks better to ceramics etc. and with less movement as its high modulus.

      Having said that I think there is some pretty thin polycarbonate supplied with greenhouses that is not particully rigid.

      The 10mm thick stuff is pretty good I find.
       
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      • CanadianLori

        CanadianLori Total Gardener

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        You're probably right about the differences in products here and there.
         
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