Had our drive block paved, there is a small section which was originally tarmac which has been extended slightly with cold lay tar. To prevent the tar getting onto the new blocks I've put some ply over it for now but I believe it can take a while for the tar to set fully. The guys suggested brushing some sand over the tar to reduce the stickyness, I have a bag of sharp sand with nothing to do at the moment. Is there any drawback to doing this? Will it affect the bonding of the tar?
TIA
TIA