You want to leave it at least a week then apply another coat of sbr and go over it with a scratch coat with waterproofer and 2.5l of sbr in each builders bucket of water then leave that a week and put another 2.5l of sbr in each builders bucket of water in you're top coat then leave that a week and float it
If you're stippling you can leave it if you're slurrying you're supposed to go over it while its tacky if you give it a good key with a brush can't see why you can't leave it
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