Which sealant for external walls.

Mar 13, 2016 1 Replies

I would like to use some sealant to fill cracks in the exterior wall of a house that has been rendered with cement. I have found various grey coloured products on ebay. Any ideas which would be best, i.e. last the longest, remaining pliable and not discolouring?



The Bostik is 4 times the price of the first one.


External frame sealant £4.29



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Mapei Coloured silicone sealant £8.30



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SIMSON ISR 70-03 WATERPROOF ADHESIVE & SEALANT - BOSTIK £17.49



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They don't discolour. They get covered in algae.

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