Kitchen Sink Leaking

Hi,

I have one of those plastic 1 & 1/2 kitchen sinks - installed when the house was built 8 years ago. It obviously has 2 waste outlets, both of which have decided to leak!

I've had a look at the waste outlets...

the main sink one is loose and can easily be moved by wiggling the pipework underneath. I have undone the large plastic screw holding the plughole is place and can see a large black washer underneath the sink. The washer looks fine. I cannot see how the whole thing was actually sealed, in fact it looks like the waste gunk is the only thing stopping it leaking even more! I cannot tighten the screw anymore than it is already.

the smaller sink is also loose, I can see the cause here. The plastic screw has snapped!

So firstly, I assume I need to purchase some form of sealant to make the whole thing more stable and leak free. Am I right, and if so what should I use? - I've seen silicon sealant and plumbers mait mentioned on previous threads.

Secondly, can I buy one of those large plastic screws, or do I need to buy a new plughole?

Thanks in advance.

Buy the lot complete for a few quid and fit.

Clean both surfaces of hole before fitting. Use silicone if you wish to make sure but it is not really needed.

Thanks Bahco.

I bought a couple of wastes from B&Q for £5 each. Really good value for money and so much better than what was originally installed. Although they are only white plastic, they look like enamel.

I took your advice and didn't bother with the silicone.

Both waste outlets are now watertight and my wife is over the moon!

Thanks again.