Olaplex is nearly 50% off ahead of Labor Day — Enough said

Every once in a while, a deal surfaces that feels like a well-timed gift. That’s exactly the case with Olaplex No. 4 Bond Maintenance Shampoo, currently 43% off on Amazon, just ahead of Labor Day.

For anyone serious about hair care — or simply ready to press reset after months of sun, chlorine, heat and humidity — this is the kind of sale worth acting on. And not just because the discount is significant, but because this shampoo is, without question, one of the best I’ve reviewed.

At its core, Olaplex No. 4 has an ethos of refreshing your hair in the best way possible. The shampoo is part of the now-iconic Olaplex bond-building system, engineered to repair the internal structure of the hair, specifically targeting the disulfide bonds that break down due to chemical treatments, heat styling, environmental stress and general wear and tear.

But, what makes No. 4 stand out is its ability to deliver that restoration without sacrificing the experience. It lathers beautifully, rinses cleanly, and leaves my hair feeling smoother, softer and noticeably stronger after just a few uses.

From the first time I used it, I could tell Olaplex No. 4 was different. The texture is luxurious without being heavy, the scent is clean and subtle, and the results are almost immediate. Over time, I noticed less breakage, more shine, and a general sense of resilience that many shampoos promise but rarely deliver. It became a staple (not just a treatment!), but a cornerstone of my hair routine.

That’s why seeing it available at such a steep discount — 43% off the full size — is something to genuinely get excited about. This isn’t just a nice-to-have, “cool girl” hair product. For many, it’s a hair-care essential. And with a bottle that size, you’re getting months’ worth of high-quality care at a price that’s rarely offered.

If you’re someone who already uses it, this is the time to stock up. If you’ve never tried it, there’s no better entry point.

The timing couldn’t be better. As we approach Labor Day, most of us are coming off a summer that’s taken a toll on our hair. Whether it’s sun exposure, saltwater, chlorine or simply more time spent outdoors, hair tends to suffer. Fall is a natural time to transition — and not just in wardrobe, but in beauty rituals. Swapping in a more nourishing, restorative shampoo is one of the simplest ways to prepare your hair for the cooler, drier months ahead. No. 4 is perfect for that transition.

Beyond my own experience, what stands out is the wide, nearly universal praise this shampoo receives. From Amazon reviews to salon professionals, No. 4 is recognized for its ability to improve the health and appearance of hair across a wide range of textures and types. Whether you have straight, color-treated strands or coily, natural curls, Olaplex has developed a reputation for helping hair feel and look better over time.

The Final Verdict

Bottom line? Olaplex works because it’s rooted in science. Specifically, the science of hair bonds. It restores what’s broken, strengthens what’s weak and enhances what’s already healthy. That’s why it has earned such a loyal following, and why, of all the shampoos I’ve tested and reviewed, this remains one of the few I return to again and again.

So yes, it’s just shampoo. But it’s also a small act of care — a decision to invest in something that works. With the season changing and Labor Day around the corner, there’s something satisfying about making that kind of choice for yourself. Especially when it’s 43% off.

This article was written by Victoria Giardina, New York Post Commerce Journalist & Content Strategist, who has spent countless hours researching, testing hundreds of products and comparing the latest makeup, skincare, hair and beauty items and trends to determine what’s truly worth your hard-earned cash. She evaluates formulas, textures, ingredients and more, in addition to consulting medical and industry experts. Some of Victoria’s latest conquests include testing the best vitamin C serums on the market, and a rinse-and-repeat review of the best shampoos of 2025. Victoria, who received a beauty industry essentials certification from the Fashion Institute of Technology, has been creating shopping guides for the New York Post since 2021 and previously held positions at Insider Reviews and CNN Underscored.