P gasket help!

As previously stated, replaced the head gasket, cylinder head and P gasket recently. I used a new ali P gasket from paddocks smeared with jointing compound (also from paddocks) all seemed to be going well. Checked the water every couple of days for 2 weeks with no water loss. All temps normal, checked yesterday and header tank was almost empty. Leaking P gasket again. Only very slightly, but enough to use 1L of water in 2 weeks. Surely the ali one hasn't failed. My guess is that it's leaking between the gasket and the block, due to it leaking rapidly before and erroding the block perhaps?... how do I stop this?

Cheers

I haven't heard of it erroding the block before, but I have heard of it leaking between the gasket and the bracket, due to errosion. Short of replacing the bracket I don't think you can do much else apart from use more jointing compound. This is assuming you cleaned the faces properly and tightened the fastners up properly when you did it the first time.

Think I've sorted it now, took the bracket off completely and flatted the face, same with the block, put on loads of jointing compound and gave the bolts a good torque up. Fingers crossed!