How can you isolate cracked cover of tanks" beams and slabs" ?

Please be more spesific and give more details to your question.What sort of isotation.

sorry . question not clear for me 

Thanks for invitation

I am apologies to answer this question because it's not my specialist field

Its depended on the kind of crack & how deep is it go on ?

In general : we start traetment with clean the crack from dust , cut along the crack to have " v " shape of surface crack , then but the epoxy .

sorry . question not clear for me and give more details to your question.

I am sorry, i didn't understand the question.