Everbuild heatproof plaster help

[Jbeesy718]

Got a chimney breast to skim on mon in Everbuild heat proof (it's a fancy gas fire not a stove) the guy has bought fire board but looking through old threads Would I be best using a cement board hardy backer or the like? First time with heat proof any help would be appreciated.

 

[SpankySouthport]

Can't be any worse than vitcas bud.

If just a fancy fire probably doesn't need the same temp resistance as a stove would maybe fine out what fire it is and ask the manufacturer?

 

[Jbeesy718]

He's bought the hrp now so will use it