suction problem

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S a plastering

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got to dash a pretty big gable we've scratched it on with the right amount of w/p but because the sand has got a red dye in it its making the top coat dry in a bit quicker than normal would an sbr solution help the problem a bit or is it a no no thanks
 
got to dash a pretty big gable we've scratched it on with the right amount of w/p but because the sand has got a red dye in it its making the top coat dry in a bit quicker than normal would an sbr solution help the problem a bit or is it a no no thanks

get inside its gonna rain forever !!
 
Yeh, you won't get suction in the constant rain!

But if you have too then yes, give it a primer coat of sbr 1:1 with water and let dry.

Then give another coat and render over while it's tacky.
 
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