Had to concrete in two metal parking posts today, in a hurry so went into B&Q for some Postfix.
Plenty of Christmas Trees, inflatable Santa's etc - but they had run out of Postfix....
Setting time being important I bought 2 bags of Instant Concrete which did the job a treat & set in time.
Not come across this before, but it stated on the bag that it was 'twice as strong as Multi Purpose Concrete'.
Made by Hanson
Fine, Coarse & Instant concrete are all rated at a compressive strength of around 40 Nmm-2 so it seems to be as strong. Multi purpose concrete was rated at 20 Nmm-2 so I guess what they say is correct.
Is this technically concrete? I thought that had to have aggregate in the mix? Or is sharp sand an aggregate?
Also noticed Shedbase Concrete on the site 1-2-2 mix + a levelling compound. Expensive way to lay a shed base, but could be handy for some other jobs.