Matrix Instacure Build-A-Bond Billion Bond Oil helps combat damage with 1 billion bond-building molecules in every drop. Formulated with Citric Acid and Amino Acids, this professional-grade leave-in oil works to strengthen hair bonds, reinforce the hair fibre, and improve overall hair resilience. Its lightweight vegan formula delivers smooth, glossy results without a greasy feel, while providing heat protection up to 230°C (450°F) for use with blow dryers, straighteners, curling irons, and diffusers. Hair feels instantly stronger, looks healthier, and appears smoother with visibly reduced split ends.