Deodorant stick texture

Deodorant stick

AnhydrousHot fill

An underarm stick that controls odour, or sweat for antiperspirants, poured hot into a twist-up or paper tube.

Smooth glide, drying to a soft, powdery finish.

Natural deodorant stick, Antiperspirant stick, Deodorant cream or paste

What it is

Deodorants reduce underarm odour; antiperspirants also reduce sweat using aluminium salts. Sticks are waterless blends of waxes, oils and powders that glide on. Aluminium-free sticks control odour without acting as antiperspirants. Roll-ons are water-based gels or emulsions made as a separate build.

Who it suits

Sensitive skin (bicarbonate-free)Hot, humid climates

Typical actives

Zinc ricinoleateMagnesium hydroxideSodium bicarbonateAluminium chlorohydrateTriethyl citrate

What is in it

Odour controlZinc ricinoleate, magnesium hydroxide, sodium bicarbonate, triethyl citrate
Wax or gellant (sticks)Candelilla wax, stearyl alcohol, hydrogenated castor oil, sodium stearate
Absorbent powderTapioca starch, arrowroot, kaolin
Emollient and fragranceCaprylic/capric triglyceride, coconut oil; fragrance

Benefits and challenges

Benefits

  • Twist-up or paper push-up tube to suit the brand.
  • Waterless sticks are low microbial risk.
  • Plastic-free paper tubes suit natural formulas.

Challenges

  • Sodium bicarbonate can irritate some underarms.
  • Sticks soften in heat and powders can settle.
  • Hot fill needs a stirred, heated holding tank.

Shelf life

Unopened
After opening

Main risks are hardness change, sweating, powder settling, fragrance loss and roll-on leakage.

Packaging

Stick
Jar
In the lab

How it is made

  1. 01Melt waxes and oilsAt about 70–85 °C for sticks.
  2. 02Disperse powders and activesGood mixing keeps powders evenly spread.
  3. 03Add fragranceAfter slight cooling.
  4. 04Pour hot into barrelsFrom a stirred tank, then cool.

hot fill · 75 °CSticks are poured from a stirred holding tank to keep powders suspended.

Specifications

Batch sizes

50 L pilot
1,000 L
5,000 L production

Lab notes

Preservation
Anhydrous sticks are usually unpreserved with an ISO 29621 risk assessment.
Stability testing
Heat cycling, stick break and payout, powder settling and fragrance stability.
Regulatory, Australia
Deodorants for skin use are declared not to be therapeutic goods. Antiperspirants that work only through inorganic aluminium, zinc or zirconium salts are excluded from TGA regulation; medicated antiperspirants with other actives are likely therapeutic goods.

Sources