Gap between Tiles and the edge of the room

[Dumbo]

Don't understand why you have a gap .what I'm saying is it is an easy cut without the skirting. Cut the tiles and tile it . Job done .

 

[MrT]

Most adhesive manufacturers do a colour matching silicone.
Which brand gun metal are you using?

Cheers Wolfe. I am using BAL grout in gunmetal.

 

[Wolfie9878]

Then bal definitely do a fun metal silicone.

 

[MrT]

BAL Micromax2 Sealant 310ml Gunmetal | Topps Tiles - http://www.**********.co.uk/tprod41592/bal-micromax2-sealant-310ml-gunmetal.html

Think this is what I need.

And just so I know I am doing it correctly, on the joint where the chipboard and concrete meet, I apply this sealant.

No grout is used at all, and the entire length of the joint is filled with the silicone?

 

[Wolfie9878]

Yep.
Tape either side of joint, fill with silicone, tool flat, remove tape.