Sealing waste pipe holes

[Tim Streater]

This house we've just moved into had extension work done 3-4 years ago. In particular, the kitchen was extended and the sink moved to a new location. Now I observe that amongst other fine plumbing work elsewhere in the house, the waste pipe for the sink (looks like its plastic 2" or so), goes through a 2.5" hole to the outside. Kneeling on the floor at the sink I can see daylight around the pipe (well, during daylight hours, obviously). No wonder the missis complained that that corner of the kitchen was very cold recently.

I guess I'm going to seal this by squirting some kind of sealant into the edges of the hole from the outside. What would be a good material to use in this instance?

[Tim W]

Tim Streater wibbled on Saturday 02 January 2010 19:52

Expanding foam. Tissue paper and a bit of silicone/etc sealant. Filler. Anything really, as long as it doesn;t eat the plastic.

[Usenet Nutter]

Expanding foam would do to take up most of the space but it doesn't like sunlight so best to finish it with cement or something else to match the wall outside

[Mike]

You should seal from the outside and under the sink, to stop the draught if it is a cavity wall. Cement would be better.

Mike P

[The Natural Philosopher]

CAR BODY FILLER

Or expanding foam ;-)

Or even hot glue...

Or stuff it with newspaper and plaster over it.

I mean, what does it take to fill a totally non structural hole? Any dick can do that ;-)