UK Fill the gap with what ?

[Ziggie]

Came across a white backbox with plastic clipped out to let the 2.5 twin and earth enter from above. The small gap was not filled ( I usually fill it with silicone) . Dawned on me that I’ve never seen A recommendation on what silicone type to use or is there a better way?

 

[Timbo]

Why bother?
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[telectrix]

uf it's a surface pattress, i usually fill rhe hole if it's oversized for the cable/s. IP4X and all that . decorators'caulk is cheaper than silicone and does the job OK.

 

[7029 dave]

Never had this problem with a surface pattress , if your careful with your knockout just about get the 2.5mm in nice an tight. Would white mastic do the job.

 

[Dustydazzler]

How big a hole are we talking , 1mm then a dob of mastic caulk , 8 or 9 mm hole then I would be looking to replace the box