‘Lok’ in on safety

Superabsorbent Ultra Thin Cores and Airlaids for

Biohazard Materials

Gelok superabsorbent laminates for biohazardous materials, including diagnostic and infectious substance transport, utilizes superabsorbent polymers to absorb many times their weight in aqueous liquids and ‘lok’ fluids into a gel to prevent leakage. Because liquids are locked physically by hydrogen bonding, they will not be released, making Gelok superabsorbent media excellent for use in biological specimen handling and the safe transport of infectious substances.

With its high absorbency capacity, Gelok absorbent media is designed to support customer packaging solutions for Category A infectious substances and Category B/UN 3373 biological substances, including USDOT and IATA ISSG regulations.

Gelok Low-Profile, Superabsorbent Laminates

Gelok superabsorbent media’s ultra-thin profile and very high absorbency capacity makes it an ideal choice for use in biohazard materials safe handling and transport. Absorbency levels can be customized for specific fluid volume and application sizes. Gelok superabsorbent media locks hazardous fluids into a gel to prevent dangerous biohazard exposure and reduce compliance risk.

Biohazard Materials Applications

  • Safely transporting infectious substances
  • Biohazard specimen bags
  • Covid-19 test specimen packaging
  • Medical packaging kits
  • Hospital and laboratory biological substance handling
  • USDOT Category A and Category B absorbent material compliance
  • Custom kitting
  • Direct to consumer diagnostic and DNA test kits
  • Spill control, containment and cleanup
  • Benchtop pads and mats
  • Absorbent pads for bodily fluid containment
  • Sharps recovery and/or disposal
  • Absorbent cores for body and cadaver bags
  • Hazardous materials compliance risk reduction

Features & Benefits

  • Customized absorbency levels for specific fluid volumes and application sizes
  • Fast rates of absorbency for quickly and safely handling dangerous substances
  • High retention capacity for leak prevention and reduced compliance risk
  • Ultra thin profile, with high absorbency; for reduction of bulk in shipping without compromising safety regulations
  • Easy to handle and cut to size; ideal absorbent packing material for custom kitting
  • Easily incorporated into custom and direct to consumer packaging designs

Sizes & Absorbencies


  • 52″ to 1.5″ (1210 to 38 mm) slit widths available
  • 28″ OD rolls with 3″ cores


  • 100 to 1,500 g/sq ft absorbency
  • Superabsorbents for a range of fluids, including blood, urine, saliva, bodily fluids, contaminated water, and other hazardous aqueous fluids.

Technical Data

Gelok 5040-72 S/S

Pad Construction / Description

An ultrathin laminate with relatively light loading of superabsorbent polymer for packages with small amounts of liquid

Absorbency Rating

Typical absorption level of ~2,500 grams per square meter of 0.9% saline solution

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Gelok 11060-42 A/A

Pad Construction / Description

A medium absorbency laminate constructed with two layers of airlaid cellulose for additional padding and absorbency

Absorbency Rating

A medium absorbency laminate with a capacity of ~5,500 grams per square meter of 0.9% saline solution

Gelok 20040-76 S/S/S

Pad Construction / Description

A customized double layer laminate with an extra high loading of super absorbent polymer for bio-hazard packages containing high levels of liquid

Absorbency Rating

A high absorbency laminate with a capacity for ~10,000 grams per square meter of 0.9% saline solution

Contact Us for Technical Advice

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Gelok Services

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Custom Manufacturing

  • Pilot machine testing
  • Research and development
  • Experienced engineering/chemical staff

Technical Services

  • Superabsorbent product design
  • Equipment/system design
  • Fully equipped laboratory
  • Training and education (products and systems)
  • Custom services as required
Pouring Liquid onto Absorbent Pad

Materials Testing

  • Tensile strength
  • Absorption rates
  • Fluid retention
  • Other testing as required

Gelok Laminate Slitting

  • Widths from 1-1/2″ (38 mm) to 52″ (1321 mm)
  • Untrimmed master roll at 54″ (1370 mm) or 50″ (1270 mm)
  • 3″ (75 mm) OD core
  • Standard OD 28″ (711 mm)