Two stage methods for processing adhesives and related compositions

An apparatus for polymerizing and/or crosslinking an adhesive or pre-adhesive composition, the apparatus comprising:

• a reaction vessel defining an interior chamber and comprising at least one collar providing access to the interior chamber;
• at least one probe assembly supported by the collar, the probe assembly comprising (i) an emitter for emitting light that polymerizes and/or crosslinks the composition, (ii) a light tube extending from the emitter and at least partially disposed within the interior chamber of the reaction vessel, (iii) adjustable positioning provisions for governing position of the light tube within the interior chamber of the reaction vessel, and (iv) a cover disposed at a distal end of the light tube, wherein the cover is transparent or substantially transparent to passage of light emitted from the emitter.