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I am just looking at the floors of my S and the '64 'original'.

The rear hole appears to be for the petrol pipe and the wiring and breather come down the other hole. Is there a grommet behind the wiring hole and what is this black stuff. I seem to recall using something called dum dum, but is there anything 'modern'? Andy ideas welcome please

I remember Dum Dum... my dad had a large reel of it for years, bought in the 1970's from an electrical factor IIRC. Electricians used it for weather-sealing conduit ends - so maybe Mark would know what's used in the trade these days?

3M strip caulk is claimed to be a modern equivalent:
https://www.spraygunsdirect.co.uk/3m-bo ... of-60.html

Amalgamating insulation tape would be a good alternative

Does that old AMALGAMATING TAPE still exist? If you want a blob of Gum-Gum Andy, just ask. We used to call it gutta-persha. The stuff we had sticks like shi......, er, mud to a blanket!

Electricians sealing compound like this. Works a treat.

https://www.ebay.co.uk/itm/Electrical-W ... 2990867814

D

S391 "dog shit" will certainly do the job, it is very similar to Dum Dum, but is of a brownish hue, not black.

Personally I use black or grey CT1 for most of these jobs nowadays. I have had great results in many jobs like this. It is more like silicon sealer than putty in consistency though.

https://saletastic.co.uk/ct%201%20adhes ... %7B3-ct%7D

3M body caulking for old school, butyl cord for modern.

Dearg1275 wrote: ↑Tue Apr 06, 2021 8:05 am Electricians sealing compound like this. Works a treat.

https://www.ebay.co.uk/itm/Electrical-W ... 2990867814

D

Think I'll go with that. Thanks for the ideas everyone