Assembly kitchen basket waste strainer to composite granite

[dugit]

When I look at the assembly instructions for the kitchen basket waste strainer to my astracast composite granite sink unit, I find that the waste flange sits on a P.E washer and then underneath it has a rubber seal but it says to ensure a watertight seal they recommend silicone sealant be applied between the waste flange and the sink.
I thought that one used plumbers putty which would then allow you to undo the assembly if you needed to?

 

[transam]

Use silicone , it will come apart if required . Ditch the washer that fits "in" the sink

plumbers putty or plumbers mate as we used to call it ? can u still get it ??

 

[TicklyT]

plumbers putty or plumbers mate as we used to call it ? can u still get it ??

I've still got a tub - it makes a great paperweight!

 

[dugit]

OK I will use silicone and ditch the washer which is so flimsy it seems to be a nonsense.
A small tub of plumbers mate I have had since about 1972 which I remember I got when I moved into another house.
Thanks for the replies
Dugit