On Wednesday, 27 March 2019 13:12:33 UTC, sm_jamieson wrote:

Sorry I didn't read all that, but I have to seal top cable openings in a plastic CU, installed to the old regs, and this looks useful

https://www.toolstation.com/intumescent-putty/p19613

Simon.

I wonder what the purpose is of bringing a noncompliant CU to another noncompliant standard.