super strength high temp epoxy
#1 Clean surfaces to be bonded ( lightly sand back of magnets with 400 paper or wire brush with dremel.) Remove any loose magnet dust with magnet putty then wash off with MEK or Acetone solvent. Clean inside of can then cross hatch with exacto blade and wash with MEK or Acetone.
#2 Apply a thin coating to both the magnets and can surfaces to be bonded. Allow 25 minutes for parts to air dry
#3 Place magnets in can, position with v blocks or a slug then place in pre heated oven @ 180 F for 15 minutes. Remove from oven then let cool. Make final magnet adjustments if necessary.
#4 Pre-heat oven to 350 f place setup in oven for 25 minutes
remove, cool and hone to desired gap.