Mixing different coloured silicone

[David Laing]

I'm siliconing my recessed shower this weekend. The tray is dary grey and the walls light grey, so I want to use dark silicone round the tray and light on the vertical corners to the ceiling.

What is the best way to do this without making a mess in the 3-way corners?

Can I silicone the tray first and let it cure, then do the uprights, or is there an issue with the wet vertical silicone bonding to already cured tray silicone?

 

[vinn]

IMO, best practice is to remove and thoroughly clean off all traces of the old silicone before applying any new silicone.

To apply the new silicone I would start tight into the bottom of the "3-way corners" and work up from the corner.
Then immediately apply the "tray silicone".
Then smooth the silicone off.

 

[chappers]

I would just go round in the light grey all round, the colours will bleed into each other. use a silicone tool like this and do it all in one go, new silicone doesn't stick to cured silicone very well.