silicon/grout seperation

[dannib]

Hi all
I have a shower tray with tiled back wall.
The Silicon is sealing great to the tray/tile but comming away from the grout between the tiles.
I will remove all of the Silicon and redo, but is there a thing I can do to the grout to prevent this seperation in future.
Thanks in advance
Danni

 

[Andy Allen]

Grout needs to be absolutely clean and free from any contaminates , and totally dry.
When spreading the Silicon go one way then the other way with your finger or Silicon tool.

 

[dannib]

Thanks Andy
Is there any method to ensure the grout is clean prior to silicon?

 

[Andy Allen]

Best Way to Clean Tile Grout | Cleanipedia

Learn how to clean tile grout. Discover the top tips and tricks on Cleanipedia!

www.cleanipedia.com

Few tips here you can try..

 

[dannib]

Thanks for the replies Andy
I will try those and ensure bone dry before silicon.

I was thinking if I could prevent the bottom inch or so from getting moist, that this would prevent reoccurrence.
Do you know if there is any product (spray or paint-on) which would seal (temp or permanently) that area of tile/grout to prevent moisture absorbing into that vulnerable area.

 

[Andy Allen]

LTP do a grout sealer that you just spray on the grout...

 

[dannib]

Thanks Andy
Its not suitable for Silicon though