Hydrocolloid technology


On contact with wound exudate, the hydrocolloid matrix forms a cohesive gel which supports moist wound healing.

*Artist's interpretation

The hydrocolloid formulation of the GranuFLEX ® and DuoDERM® dressings is unique, consisting of a cross-linked honeycomb matrix made from a proprietary mix of sodium carboxymethylcellulose, gelatin, pectin and adhesive polymers.

Key properties of the three hydrocolloids contained in the GranuFLEX ® and DuoDERM® dressings formulation:


1. Sodium CMC (NaCMC)

  • Polysaccharide, rapidly absorbs fluid and gels, provides instant absorbency.

2. Pectin

  • Polysaccharide, absorbent.
  • Provides a lower pH to the formulation that more closely matches that of human skin.
  • Provides medium term absorbency

3. Gelatin

  • Protein, provides longer term absorbency.

GranuFLEX ® and DuoDERM® dressings incorporate the unique ConvaTec hydrocolloid formulation that distinguishes them from other hydrocolloid dressings.

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