Protect, Strengthen, and Enhance Your Curls. Flex your style without compromising the health of your curls! DevaCurl Flexfactor Curl Protection & Retention Primer, 8 fl oz is a lightweight, heat and UV protective spray formulated with Curl Memory Complex to shield your curls from damage caused by brushing, friction, manipulation, and heat styling up to 450°F. Perfect for all curl types, this primer enhances curl elasticity, reduces breakage, and seals the hair cuticle for stronger, healthier curls that spring back to life.