Redken Cerafill Stemoxydine Redken Carafil Retaliate Hair Re-Densifying Treatment For Advanced Thinning 90ml/90ml Tackle the appearance of thin looking hair with Redken Cerafill Retaliate Stemoxydine Treatment. Featuring Cerafill System Technology, the treatment strengthens fibre to prevent breakage and energises hair follicles to re-densify hair. Helping to improve the density of your thinning hair in only 3 months, the invigorating thickening system contains 5% Stemoxydine that will leave you with the appearance of thicker looking hair.