No. 4 Bond Maintenance Shampoo — Reddit Reviews
by Olaplex
Updated November 3, 2026
Bond-building shampoo for processed hair; clarifies hard-water buildup, risks dryness and scalp irritation.
What the community says
A cleanser built around Bis-Aminopropyl Diglycol Dimaleate, with amodimethicone and conditioning polymers for processed hair. It makes sense for bleached, breakage-prone lengths, though curly and sensitive scalps report dryness, buildup, itching, and worse definition.
What this means for you
What people love
Watch out for
Product details
Where to buy
Real Reddit threads — 54 mentions across 30 threads
Olaplex No. 4 Bond Maintenance Shampoo on Reddit, in one place — 30 threads from r/Wavyhair, r/HaircareScience and 3 more, summarized.
“Wash with olaplex shampoo and conditioner 2x a week.”
Positive
“Okay so I have been using Olaplex shampoo for probably six months. I'm a guy with thinning hair at the temples, and it got noticeably better after a month or two of using the Olaplex I got from Sephora.”
Positive
“Amazon and Sephora products look and smell pretty much the same, but feel slightly different.”
Positive
“Shampoo No. 4 (Olaplex)”
Positive
“Olaplex is the only thing that works for me. I use no 4 and 6 at the moment.”
Positive
“Soo expensive but it is magic in a bottle.”
Positive
“I've been alternating between olaplex shampoo/conditioner, Giovanni castor oil shampoo/conditioner, and NTYM curl talk shampoo/conditioner.”
Mentioned
“love olaplex too, i’ve used the shampoo, conditioner, and no. 3 but this mask has really been amazing.”
Positive