Ultrahydro 50B

Easy-to-use high molecular weight Polyisobutene

Long lasting high gloss


Excellent adhesion and transfer resistance

Technology overview


Ultrahydro 50B is a blend of high molecular weight polyisobutene and isododecane. Ultrahydro 50B makes high molecular weight polyisobutene easy to use by lowering its viscosity and making tank and equipment cleaning easier. In addition, the Ultrahydro 50B blend has a higher flashpoint than straight isododecane.

Ultrahydro 50B is a flowable material that provides very high gloss that lasts and great adhesion to skin, lips or eye lashes.

Application and uses


Lip products: Ultrahydro 50B provides high gloss levels, good adhesion to lips and high transfer resistance in lip sticks and lip gloss

Mascara: Ultrahydro 50B provides high gloss levels and high adhesion to eye lashes

Benefits and claims in finished products


  • High gloss
  • Long lasting gloss
  • Excellent adhesion
  • Good transfer resistance
  • Fuller and thicker lashes
  • Easy to use and less equipment cleaning down-time

Formulation guidelines


General guidelines:

  • Recommended dosage: 1 – 15%
  • Ultrahydro 50B can be added to the oil/wax mixture under normal processing conditions
  • Soluble in, among others:
  • Mineral oil
  • Plant based oils
  • Esters (e.g. isopropyl myristate)

Global compliance


Ultrahydro 50B is globally compliant as cosmetic ingredient (including China)


Ultrahydro 50B: Polyisobutene, Isododecane


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Ultra Chemical Inc.

2 Bridge Avenue Suite 631

Red Bank, NJ 07701



Ultra Chemical BV

Zuidplein 36 - 1077

XV Amsterdam

The Netherlands