Years ago when I tried to reseal my first pump I tried to use that ribbed seal because of the shape. But I recall it tweaking the pump lid so its the only reason I wondered if something was wrong.
Somebody told me to use the round one with vaseline and I have done so with 4+ pumps that are still in service and none of those pumps have leaked a drop.
IIRC, some folks shave off the nubs and used the shaped seal. I have heard of the intact nubbed version being fat enough to crack the case.
I've resealed probably close to 50-55 pumps and I have always used the shaped seal. Granted, I do shave the nubs off the side. Fits perfectly that way. I have never tried the other seal, so I cannot comment on those ones unfortunately.
If it works, doesn't matter to me.
Geez! Cracked pump tops from an itsy baby rubber seal! I never knew nubbs could cause so much trouble haha!
Well anyway if I take the cover off again maybe I'll pull the seal out and shave the nubbs. But again its sealing and doesn't appear to be cracked so I'm satisfied right now.
thanks again for all the help guys.
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There is a long stretch of thin aluminum running down the side of the lid,.. that's what broke out when I didn't shave the nubs enough.
I used to just snip them instead of razoring them close.
After that I switched to the flimsy lid seal and had problems with it staying in place while I lined up the LDA lever and idle RPM bump lever,
pinched one and it leaked so I went back to the shaped seal and started trimming with the razor blade.