Frequently Asked Questions

The name Glue4Life reflects the unique combination of soft, elastic and tissue-adhesive properties of our hydrogels. Designed to support delicate human cells, Glue4Life hydrogels contain functional groups that promote tissue interactions and offer possibilities for building complex, multi-material tissue constructs. The name reflects our vision of bringing different components together to engineer living tissues.

A bioink is a printable biomaterial formulation, often a hydrogel, that can contain living cells. Bioinks are used in 3D bioprinting to create three-dimensional tissue constructs. They help protect cells during printing and provide a supportive environment for cell survival, growth and tissue formation. Bioinks may also be printed without cells, depending on the application.

Multi-material 3D bioprinting combines different bioinks, biomaterials or cell types within a single tissue construct. By depositing materials in precisely controlled patterns, researchers can create structures with distinct mechanical and biological properties that are biologically relevant. This approach enables the fabrication of more complex tissue architectures, including layered and heterogeneous tissue models.

Yes. In addition to extrusion-based 3D bioprinting, Glue4Life hydrogels can be used for cell injection and pipetting-based applications. Formulations with lower degrees of crosslinking can be handled using positive displacement pipettes designed for viscous materials. The most suitable handling method depends on the selected hydrogel formulation and application.

Glue4Life hydrogels are based on animal-free, biodegradable hyaluronic acid (HA) and proprietary crosslinker chemistry. The platform is designed to provide a soft, cell-supportive environment for human tissue engineering and biofabrication. Specific compositions and material properties depend on the selected Glue4Life formulation. Contact our team for detailed product information.

Yes. The Glue4Life hydrogel platform allows formulation adjustments to explore the incorporation of tissue-specific molecules and other functional components. This flexibility enables researchers to investigate different cellular microenvironments and tissue engineering applications. Contact our technology team to discuss the feasibility of customization for your research.

Glue4Life hydrogels use a cell-friendly, time-dependent click chemistry crosslinking mechanism. This allows the material to gradually form a stable three-dimensional hydrogel while maintaining a practical processing window for biofabrication. Unlike systems that require additional UV exposure or post-printing crosslinking treatments, Glue4Life hydrogels do not require an additional crosslinking step after printing.

The storage modulus (G′) of Glue4Life hydrogels depends on the formulation and degree of crosslinking. Selected fully crosslinked formulations have reported storage moduli of approximately 100–1,000 Pa, reflecting their soft mechanical properties. For formulation-specific rheological data and measurement conditions, please contact our team.

The viscosity of Glue4Life hydrogels depends on the formulation, shear rate and degree of crosslinking. Glue4Life hydrogels exhibit shear-thinning behavior, meaning their apparent viscosity decreases under applied shear, facilitating extrusion-based 3D bioprinting. Because crosslinking progresses over time, viscosity also increases during preparation and processing. Each formulation has a recommended biofabrication window to support consistent handling and printing performance.

Yes. Glue4Life hydrogels are designed to provide a supportive environment for human cells, including delicate human stem cells and human pluripotent stem cell (hPSC)-derived cell types. The platform has been investigated in applications involving stem cell-derived corneal and neural tissue models. Cell compatibility and performance depend on the selected formulation, cell type and culture conditions.

Glue4Life hydrogels exhibit tissue-interactive and adhesive properties, but current formulations are not intended for use as surgical tissue glues. Their functionalized polymer chemistry is designed to support interactions between engineered constructs and surrounding tissues, an important consideration in tissue engineering and regenerative medicine research.

No. Glue4Life hydrogels use click chemistry and do not require UV light, photocrosslinking or additional post-printing crosslinking steps. This simplifies the biofabrication workflow and avoids exposing encapsulated cells to UV irradiation or additional photoinitiators during crosslinking.

Glue4Life hydrogel components have formulation-specific storage requirements. Depending on the component, storage may be at room temperature, +4 °C or −20 °C. Always follow the storage instructions provided on the product label. Once prepared, the hydrogel should be processed within its recommended biofabrication window. Fabricated cell-containing constructs can subsequently be cultured under suitable conditions, typically at +37 °C.

No. Prepared Glue4Life hydrogels are intended for single use and should be processed within the recommended biofabrication window. Because the crosslinking reaction continues over time, the hydrogel gradually becomes more viscous, eventually exceeding the optimal processing range. For consistent results, prepare the hydrogel shortly before its intended use and follow the product-specific instructions.