October 4, 20251 yr I've a few 4" pipes for running services outside and now I'm sealing up I want to tackle this area before my final air tightness test. I was looking at Wiska Gel or similar, can any solicone be used or is there a safer type for electrical cables - I've a 4" plug sealing the pipe but the cable holes have gaps I want to gel up if possible. Thanks.
October 4, 20251 yr 2 hours ago, mike2016 said: ignore - found this thread - will see what expanding foam I have handy! A bit of rockwool stuffed down as a plug, to stop the foam going too far down, and a squirt of FM330 = job done.
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