Tile adhesive vs joint filler?

[solddowntheriver]

I have finally finished boarding out the bathroom with a combination of hardie (shower area and bath) and mr plasterboard around the rest of the walls and I know I need to tape and fill the hardie joints with alkaline tape and some of the tile adhesive I will use, my question is can I use this tile adhesive to fill the taped mr plasterboard joints or should I use normal plasterboard jointing compound?
The tile adhesive I have is weber spf.

 

[PrenticeBoyofDerry]

If you have tile addy, providing you can get a smooth level finish, it should not be a problem.

 

[solddowntheriver]

Thanks for the reply, I have weber spf for the hardie so will use that for the board joints.

 

[PrenticeBoyofDerry]

I don't foresee a problem using it, I have done similar in the past without any issues. It's likely better than joint filler, if joint filler should ever get saturated it will start to soften and could fail. Not that I expect that to ever happen though if the tiles and grout are fixed correctly.