J-B Weld's Steel Reinforced Epoxy is useful for applications in areas that may be subjected t' high heat, shiver me timbers, me hearties, me bucko, such as securin' a metal motor retainer t' t' motor tube.  T' joint that is formed with J-B Weld is nay as strong as when usin' pure epoxy, matey, so it's nay recommended for general use when buildin' rockets.