Duradry PM: In-Depth Review

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In this article you’ll find everything there is to know about Duradry® PM. We’ll tell you about our secret formula and how it will help to stop your excessive perspiration.

By the end of this article you’ll have a “PhD.” on excessive underarm sweating and Duradry® PM. We don’t know if it will land you any job, but who knows, right? 😉

BTW, we love that you are here. For us it means that you are interested in digging deeper and have a desire to understand the details. Maybe you are as obsessive as we are about the sweating science (yes, that’s a compliment!).

Key ingredients

What makes a product work (or not) is its formula. And to know the formula we need to research the ingredients. So let’s begin by showing you what we’re made of.

Aluminum Chloride Hexahydrate (15%)

This Aluminum-based salt is the active ingredient in Duradry® PM’s formula. This basically means that it’s the main actor in this play, the one with the magic touch.

Every antiperspirant out there uses an aluminum-based compounds as active ingredient. You have them in many flavors; i.e. Aluminum Chlorhydrate, Aluminum Zirconiums, and others.

The way all aluminum-based compounds work (that is, all antiperspirant in the market) is by creating a plug in the ducts that sudoriparous glands use to excrete sweat. Yes, as simple as that!

So the question now becomes: Why is our active ingredient, Aluminum Chloride Hexahydrate, the most effective of them all?

Plainly put, Aluminum Chloride Hexahydrate, features the smallest molecule of all the antiperspirant active ingredients, so it’s effective on all pore sizes.

Additionally, the plug created by Duradry® PM’s active ingredient is more stable and durable. This means that the antiperspirant effects of Duradry® PM will last for days.

This results in Duradry® PM being inherently more effective than other commercial products, even so-called Clinical Strength.

So, a new question pops into mind: Why aren’t all commercial antiperspirants formulated with Aluminum Chloride Hexahydrate?

CPG companies like Unilever, P&G, and the sort are interested in the bottom line and appealing to the masses. Aluminum Chloride Hexahydrate presents two problems for them:

  1. It’s more expensive than other active ingredients, and
  2. It is not for everyone. Unless you sweat more than you would like to, we recommend using other products. Our active ingredient is strong, and in some cases may result in some discomforts, such as: itching, tingling, and irritation.

If you’re worried about safety, you can read Is Duradry® PM safe?

Salicylic Acid

Again, if our formula were a well-orchestrated Broadway play, then Salicylic Acid would be the supporting actor in the play (and the best one at that!).

Salicylic Acid is a multifunctional ingredient. Here’s a few of its beneficial properties:

  • Contains the same anti-inflammatory components as aspirin.
  • It has antimicrobial properties.
  • It’s an exceedingly effective exfoliant. It can exfoliate inside the pores as well as on the skin’s surface.
  • Improves collagen production to help regenerate skin tissue.

Why did we add this ingredient to Duradry® PM’s formula?
A recent clinical trial demonstrated that the combination of Aluminum Chloride Hexahydrate and Salicylic Acid is more tolerable to the skin, and increases the performance of the formula.

We included Salicylic Acid at a specific concentration to make it work, but of course that’s a trade secret.

What is Salicylic Acid so important? Because it will:

  1. Cleans the pores inside out so the active ingredient can do its job.
  2. At the same time it will eliminate bacteria, and
  3. reduce the possibilities of skin inflammation due to the active ingredient’s strength.
  4. All this while increasing the effectiveness of the active ingredient due to the due to the keratolytic properties of salicylic acid.

A very important note about ingredient’s quality

Of course you’ll find other products in the market containing Aluminum Chloride Hexahydrate. But the fact that this ingredient is listed on the label doesn’t mean you’re being told the whole story about that product.

Not all raw materials are the same, even if they have the same name. It’s just like if you were to order a burger at a fast food joint versus ordering it at a gourmet restaurant. There is an appreciable difference in quality, yet both are “burgers”. In the chemical world, the same logic applies.

There are a several “grades” or qualities for each ingredient — ranging from Technical grade to Analytical Reagent (AR) grade. Technical grade is used for industrial applications, whereas AR grade is suitable for laboratory use.

So, what’s the difference and what does it mean to you?

  1. Purity. Let’s say you buy an antiperspirant that states on the label that it contains 15% of active ingredient. If the manufacturer used a Technical grade raw material (95% pure), it could actually mean that the antiperspirant contains less than 14.25% of active ingredient.
  2. Safety. Technical grade raw materials may contain harmful levels of chemicals including Sulphates (S04), Iron (Fe), Arsenic (As), Alkaline earth metals, and other heavy metals.

Formula features

The burger from the gourmet restaurant is better. Not only due to its premium ingredients, but also because it was cooked to perfection, then put together with artistry. The way flavors play with the sauce is just mouth watering. The spongy bread is slightly toasted for perfect texture. The crunchy, long, thin fries flavored with a hint of sea salt. I bet you are hungry now!

What we’re trying to say is that a great product is not just about the ingredients. There’s more to it!

We have more than a decade working with antiperspirants. And throughout all these years we have experimented with different ways to apply them on the skin.

And only after years of analysis and trial, it was possible to arrive at our current formula.

Please read the Our Story page for more information on this journey.

Gel delivery system

Duradry® PM was formulated as a gel, and that wasn’t a coincidence, nor a light decision. On the contrary, it was a big challenge due to the nature of our Key Ingredients.

Why not a liquid formulation?
While a liquid is easier to formulate and manufacture, their main problem is its application on the skin.

Here’s how different applicators perform:

  1. Sprayers. These are not practical because it’s not possible to apply the product with accuracy. And when applied, liquid drips from the underarms, which could result in the product accidentally landing on irritable areas like your eyes (no good!).
  2. Roll-ons. Safer than sprayers, and more accurate for sure. We used to manufacture a similar product with roll-ons, but several problems rose. Leakage of products when traveling (or shipping), stuck rolls, and others.
  3. Dab-ons. Safe and accurate. But it’s difficult to control flow and apply evenly. After a few uses the applicator cloth gets ruined, and cannot be used.
  4. Towelettes. Safe and accurate. Perfect for travelling. But not an efficient delivery system. Lots of product goes to waste since the user cannot use the entire product in the towelette. Extra costs for packaging translate into higher costs per application for the end consumer.

So, the only solution was to attack the problem from the root, and that meant that we needed to move from a liquid to a gel. We formulated and re-formulated everything. We invested several months on this process until we achieved something to be proud of.

Next time you have a Duradry® PM on your hands (or should we say underarms?) know that there are years of research behind it.


Duradry® PM does not contain alcohol, or how it’s called in more scientific terms: ethanol or ethyl alcohol.

Benefits of alcohol-free formulas

  • A 2003 study published in the Journal of Hospital Infection, found that with regular exposure to alcohol-based products, the skin is no longer able to keep water and cleansing agents from penetrating, thus further eroding the skin’s barrier.
  • Alcohol can stimulate oil production at the base of the pore.
  • It makes skin inflammation worse.
  • Small amounts applied to skin increase cell death by approx. 26%.

Product design

And then, of course, is the way the burger is served on the plate, the comfortable chair, spotless clean table, the perfect lighting and temperature (just chill enough to be fresh without needing a sweater; and very importantly, no air vents pointing at your face! Yes, we are mind readers)

Long tip applicator

As you read above, we had very good reasons to formulate our product as a gel. But to apply it we needed the perfect packaging.

Duradry® PM is strong, only a small amount is needed per application. So the typical barrels currently being used in the market were not going to work.

The product is filled in a flexible tube, but instead of having a regular flip-top cap we decided to use a medical grade tube with a long tip.

It allows you to control flow and apply the product with accuracy. And the cap securely seals the orifice in the applicator so you can travel comfortably without leakage risks.


As simple as it sounds, no fragrance added. Duradry® PM is all about controlling your excessive perspiration, no need to add french-freshly-cut-garden-roses fragrance.

Safety and quality control

Duradry® PM was formulated following strict FDA guidelines. Hint: the registration number (NDC) is shown on the product’s box front cover.

Duradry® PM is manufactured in a FDA and GMP certified facility. Meaning that all quality rules are followed. From raw material checks upon arrival, to microbiological tests performed on each manufactured batch.

For more information we invite you to read Duradry® PM’s FAQ.

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