bonding coats for sockets alternative?

[psd99]

I got a plug socket that I want to install next to an existing one in the kitchen.
I'm doing this before the specialist for the splashback comes in. so essentially the finish on the wall isn't that important as the splashback will cover this eventually.

I get how to do this i.e chisel out the wall, put a metal box into the wall, run trunking and then the wire and connect up etc.

but what I'm struggling to understand is why do I need to use bonding coat? what's wrong with using something like gyproc easi fill straight for the gaps? the reason I ask is the bonding bags are like 12.5k minimum and I barely need a quarter of the bag!

if what I have in the garage isn't suitable please advise what is suitable.

 

[psd99]

As above I'd use board adhesive it's quicker and easier than bonding and if a decent finish is required shrinks back slightly so a cheap easy sand readymix filler can be used to finish. Loads of electricians use this method for filling chases and sockets.

that's for plasterboards? This is brick or blocks.

 

[psd99]

chisel out the wall, put a metal box into the wall, run cable,cover with trunking then wire up, easy fill will work but bonding is better as it will hold in place better bonding is about £6 for 25kg bag and easyfill is double for 10kg but if you already have it and dont need it for anything else then use the easyfill

you can also use board adhesive if you have any of that

thanks yes it is dead cheap but like I said 25KG bag and I probably only need like 3 KG of that bag barely.