Salon Bond Builder — Step 01 of the REF ProPlex System REF ProPlex 01 Bonder is the first step of REF Stockholm's three-part ProPlex salon system, designed to be mixed directly into colour or bleach during the chemical service. The water-based formula carries a Sodium Methoxy PEG-16 Maleate/Styrene Sulfonate Copolymer — the active bonding agent that helps reconnect broken disulfide bonds inside the hair shaft — alongside Aloe Barbadensis Leaf Juice, Ascorbic Acid and Panthenol as supporting conditioning and antioxidant components. 100% vegan and cruelty-free. Why Choose It? Mixes directly into colour or bleach — works during the chemical service rather than after the fact Sodium Methoxy PEG-16 Maleate/Styrene Sulfonate Copolymer helps reconnect broken disulfide bonds inside the hair shaft Aloe Barbadensis Leaf Juice and Panthenol support hair feel and moisture retention during processing Ascorbic Acid contributes antioxidant support to the in-process formula 100% vegan and cruelty-free — first step of the three-part REF ProPlex salon system Best For Salon colour and bleach services where the goal is to keep the hair structure intact through the chemical process. Used by colourists as the in-process step before Perfector 02 at the basin and Maintainer 03 at home. Not a stand-alone home product — pairs with the full REF ProPlex protocol.