anti-seize or?

[JFP in PA]

Originally Posted by jandr95

The bolts that hold my front calipers in place (02 Boxster S) and the screw holding the brake line bracket to the strut tower have a blue substance on the threads. Based on mileage, I'm guessing this is the first time they've been removed. So, is this an anti-seize compound or a thread locker? Should I be applying this substance when I reassemble? What do you guys think? I will torque them down to factory specs.

ABSOLUTELY use anti seize on the calipers, NOT thread locker. Do a search for the number of people that have had to either have time-serts or Helicoil installations on the calipers, or had to replace the calipers when the alloy threads came out attached to the bolts. Anytime you are in doubt, reach for the anti seize over thread locker; there are relatively few fasteners on these cars that need thread locker.