Plumbers Silicon On Backerboard

[charliesw4]

Just been round to a job where the plumber has installed a shower tray and siliconed up the edges against the backerboard (Marmox type - unsure of make) - all fine, except he has smeared it into a thin layer approx. 30mm up all the way around.

Planning to tank the shower using Mapegum etc. Whats the best way to remove the excess before I do? Will Silicone eater harm the boards?


Thanks

 

[Flintstone]

Run knife where you want it to cut it then rub it off with your finger or whatever, easy

 

[Tile seller]

If the boards flat enough you could try shaving it off with razor blade and give it a rub with some white spirits to remove any last bits.

 

[Qwerty]

It would have soaked into the cement face slightly so cut off what you can then lightly sand the rest

 

[bcd-87]

Can't you just tank over it ?

 

[Qwerty]

Can't you just tank over it ?

Mapegum won't stick to silicone

 

[bcd-87]

Mapegum won't stick to silicone

Oh right, cheers