Permabond MM115 tolerates some oil on the nuts and bolts. In most cases, it is perfectly ok to use Permabond MM115 on ‘as received’ nuts and bolts. We recommend testing, particularly if nuts and bolts appear heavily contaminated.
A couple of points to consider:
If you always clean and degrease nuts and bolts before using Permabond MM115, you can be confident in achieving consistent bonding and sealing performance every time. If you don’t want to do surface preparation, consider a more oil–tolerant threadlocker. Permabond HM129 may be suitable but it depends on your requirements.
If you decide to clean components before bonding, a suitable degreaser would be acetone or isopropanol. Alternatively, use Permabond ASC10 activator as a cleaning agent on nuts and bolts and speed up adhesive cure.