Using Wedi Jointing Tape for Cement Boards

[revelation]

We are looking to joint our cement boards with some wedi tape (pictured) around the shower and bath areas.  What is the best stuff to use to bed it?  Is the Wedi 610/620 necessary as it is expensive.

[nod]

Before I went on to impi I used fibre tape and painted it with tanking 

[revelation]

8 hours ago, nod said:

Before I went on to impi I used fibre tape and painted it with tanking 

I think this needs bedding or wedi want their glue used.  But it’s pricey. 

[Nickfromwales]

Avoid the 610, it's the work of the devil. Literally NEVER cures and whatever you get it on, cannot EVER be cleaned off.

Any of the tanking solutions will be fine. Paint all the areas first, allow to dry ( it'll dry very quickly ), and keep going until you have a decent layer built up. You then need to wallop a load of it where the strip will go, and immediately bed it into the wet solution. Use a 3" paintbrush to squeegee the excess solution outwards to the edges / ends, and brush the excess out and flat.

Repeat until you're happy.

[revelation]

Is something like this okay? I think we have some of this already.