It's mixed with sealant to make bait (9)
I believe the answer is:
tantalise
'bait' is the definition.
('bait'->'tantalize' is in my internal thesaurus and 'ize'->'ise')
'it's mixed with sealant' is the wordplay.
'mixed with' indicates an anagram.
'it' anagrammed with 'sealant' makes 'TANTALISE'.
'to make' is the link.
(Other definitions for tantalise that I've seen before include "Tease, torment" , "Tease cruelly" , "Tease and entice" .)