If is external plates, dont worry to much, aply the sika and tight the bolts, internal plates is another
history, in my
boat as a example i need to rebed the chainplates slots with the
rigging in tension, if not the plates distort the caulking and leak again, what i use now is butyl tape and so far is working well, no
leaks, forget to wait 24 hours for the sika , at 24 hours the sika is dry bone, my opinion...