OLAPLEX No.4C Bond Maintenance™ Clarifying Shampoo is a weekly deep cleansing shampoo formulated with a broad-spectrum clarifying system to remove impurities that weigh hair down and cause damage without stripping hair. Purified hair looks and feels healthier and receives reparative treatments more effectively for an optimized hair repair routine to REPAIR. STRENGTHEN. PROTECT. What It Does OLAPLEX® No.4C Bond Maintenance® Clarifying Shampoo removes daily product buildup and excess oil then goes further with a broad-spectrum clarifying system to eliminate the widest array of damaging impurities.