Sink Drain sealant

I suppose you /could/ use jollop, I use silicone.

RT

Run a ring of translucent silicon sealant under the rim before dropping it thru the sink. That ring should be continuous, and when you tighten down the sink drain a small amount should squeegee out - wipe it off immediately before it goes off.

Andrew

Yes that'll do fine. Silicone as suggested by others is OK as long as you don't (ever) twist the fitting after it's set (e.g. getting a trap on or off). If you do it's liable to break the seal and leak, whereas mait stays gooey for years and tends to set like a glue so making it unlikely you'll disturb the joint accidentally.

that's why best to dress the sink the night before you're going to do a job (if possible) with the old 2 screwdrivers down the plughole trick

RT

Usually there's a felt 'washer' and no need for any sealant

In message , Mike writes

None I've ever used have had 'felt' washer, all have had various plastic and rubber washers. A bit of silicone never goes amiss though

Okay - some have a felt 'washer' (which sits on top of the rubber one) and there's no need for any sealant