New bio-based multi-purpose adhesive from DELO
Last update on Jul 7, 2026
Adhesives formulators working on sustainability-driven projects can now evaluate DELO PHOTOBOND SJ4192, a bio-based multi-purpose adhesive containing more than 60% renewable raw materials, with adhesion performance on metal, glass and plastics.
According to DELO, sustainability targets are becoming more demanding, particularly in the automotive industry, where switching to greener materials has often required trade-offs in performance. The company reposrts that DELO PHOTOBOND SJ4192 meets high technical requirements while supporting sustainability goals, and is the first DELO adhesive in which renewable ingredients make up more than half of the formulation.
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62% renewable content without performance trade-offs
The company states that it has been replacing fossil-based raw materials with renewable alternatives for several years, guided by the principle that sustainable formulation should not come at the cost of performance. According to DELO, DELO PHOTOBOND SJ4192 demonstrates that both goals can be achieved together: the adhesive consists of 62% renewable raw materials and, according to DELO, outperforms its non-bio-based predecessor in several mechanical properties.
Precursors derived from corn and castor oil replace the main resin components in DELO PHOTOBOND SJ4192. According to DELO, this approach conserves finite resources while maintaining the adhesive's technical performance.
Moisture resistance, peel strength and low-outgassing
For formulators evaluating this adhesive, DELO reports the following performance attributes:
- Moisture resistance: high long-term stability, including in demanding environments
- Flexibility and peel strength: improved plastic adhesion, particularly on polycarbonate
- Versatile bonding: suitable for metal, glass and plastics
- Low outgassing: suited to sensitive applications such as navigation displays
- Fast, low-emission curing: UV or visible light curing in a few seconds
DELO PHOTOBOND SJ4192 is designed as a multi-purpose adhesive for bonding metal, glass and plastics, with particular performance on polycarbonate surfaces. According to DELO, these bonding characteristics are used, for example, in frame and housing bonds for navigation displays in cars.
Application is straightforward: the adhesive is typically dispensed via needle. According to DELO, curing takes place with low CO2 emissions through UV or visible light, in just a few seconds.
Expand portfolio to light-moisture and light-heat curing
DELO is working on expanding its bio-based adhesive portfolio. According to DELO, future systems are expected to include light-moisture and light-heat curing options, further broadening the range of sustainable bonding solutions.
Dr. Karl Bitzer, managing director of DELO, commented, "Developing bio-based adhesives is one of our long-term sustainability projects. Our chemistry team works continuously to identify and integrate sustainable alternative raw materials. It is particularly impressive when the technical properties can be improved as well-this shows the great potential of these raw materials. We look forward to offering our customers further high-tech adhesives with high bio content in the future."
According to DELO, DELO PHOTOBOND SJ4192 demonstrates that bio-based adhesives can do more than reduce environmental impact. With more than 60% renewable raw materials, DELO reports that it sets a new benchmark in sustainable bonding without sacrificing performance. It is the first DELO adhesive to exceed 50% bio content, and according to DELO, it outperforms its non-bio-based predecessor in key mechanical properties. For industries such as automotive, DELO positions this adhesive as a path toward greener production.
Image Credits: DELO