PILLOW PROOF blow dry express primer 170 ml PILLOW PROOF blow dry express primer 170 ml is a professional hair product that helps to shield hair from heat damage while styling. It is formulated with a heat-activated polymer that seals the cuticle and protects from heat up to 450°F. It also contains aqua-lock technology which helps to lock in moisture and create a barrier on the hair surface to help prevent against humidity. The primer is also humidity resistant and helps to reduce frizz and flyaways for a smoother, longer-lasting style.