A viscous, proteinaceous substance that is topically applied to a wound bed to provide a temporary (degradable) matrix of structural proteins (animal-derived) for the attachment of native cells, to promote wound healing. It is typically contained within a syringe and applied with an applicator. It is intended as a primary dressing typically for hard-to-heal ulcers (e.g., venous leg ulcers), and is covered with a secondary dressing. This is a single-use device.