Bond Rx Step 1 Professional Bond Builder - John Paul 。Paul Mitchell Bond Rx Step 2 Professional Bond-Building Sealant strengthens and seals broken bonds within hair, restoring structure from the inside out. This professional-grade formula works as the second step in the Bond Rx system, penetrating deep to rebuild damaged strands and lock in moisture. Ideal for chemically treated, color-processed, or compromised hair, it delivers visible results with improved elasticity, shine, and resilience. The generous 33.8 fl.oz size ensures long-lasting salon-quality care at home. Transform weakened hair into stronger, healthier-looking locks with this essential bond-building treatment.