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The cork end seals with adhesive look tempting but they may vary a bit in thickness. I tried them out and then laid the intake for a trial fit. The intake sat too high and may not have come down enough when torquing. That might leave me a water port gap and definitely a mis-alignment where the head and intake meet. So I used the TA-31.
Good luck as I have had three failures already and will be going for #4 to seal the intake.
I agree the adhesive is very tempting and is why I used it once I saw how it stuck. Something doesn't sound right you keep having leaks. I shoulda measured the cork just to see how consistant it is. If I remember right I think the China walls are supposed to have like a .070 gap to seal right.
I actually put 2 intakes on in the last 2 weeks using that sticky cork. Normally I always go for the permatex.
Throw the cork gaskets away. No matter how you glue them down they WILL shrink and slip out. One alternative to sealer for the gasket, The Right Stuff by Permatex. This stuff is fantastic. Very strong and flexible. Skims in about 2 minutes and sets up in about an hour. You can return the engine back to service without having to wait like most other sealers.