I noticed a slight smell and also cold draught.. just wanted to see if it is OK too seal it and that would helpEvening. There should already be a rubber seal in between the 2 pipes. Are you worried things may come out of it?
Harvest
Thank you @ShaunCorbs @Harvest FieldsNo problem. The link @ShaunCorbs has sent above should do the trick.
Reply to the thread, titled "Seal soil pipe gap/ downstairs toilet" which is posted in Boiler Advice Forum on Electricians Forums.