problem skimming over bonding

[DIYedboy]

This morning I bought 2 bags of bonding n one multifinish from Selco. I smacked on the bonding, waited 2hrs n went over with the multi............jeez, the bonding sucked the life out of the multi..............had to spray the wall so I could keep the multi workable.

What went wrong?........the background was dense concrete blocks which I lightly sprayed before bonding.

 

[opps]

Dirty water, out of date plaster?

 

[bobasd]

2 coats of pvc, the first dry an the second one tacky.
then apply the bonding.
allow bondin to firm up - say 45 to 60mins - an then skim it while its just damp.

 

[DIYedboy]

The multifinish left in the bucket was totally workable therefore no problems with date or tap water. I can't understand how the bonding could be sucking the moisture out of the multifinish

 

[23vc]

If you didn’t pva whatever you put the bonding over if it was old brick/plaster or soft block, and the bonding had dried a bit, then that totally explains it. Bonding suction has to be under control. Massive soaking of bonding before skimming may also have avoided it