Biobased and Recyclable Adhesives and Sealants: How Sustainability is Transforming Industrial Applications

Photo: Vitaly Gariev / Unsplash

Industrial adhesives and sealants have traditionally relied on petrochemical raw materials, the production and disposal of which place a burden on the environment. In recent years, however, pressure has been growing for more sustainable alternatives—whether due to legislative requirements, corporate responsibility, or customer demand. Biobased adhesives, produced from renewable sources such as vegetable oils, starches, or lignin, offer comparable strength and durability to conventional products but with a significantly lower carbon footprint. Similarly, recyclable systems, which enable easier disassembly of joints or reuse of materials, are finding applications in automotive, construction, and electronics. What specific innovations are shaping this segment today, and what challenges does their implementation bring?

Sustainability as a key factor in the development of adhesives and sealants

The industrial adhesives and sealants market is undergoing a fundamental transformation, where sustainability is becoming not just a marketing argument but a technical necessity. Manufacturers and processors are increasingly demanding products with a lower carbon footprint that meet stringent environmental standards without compromising on quality. This shift is driven by both regulatory pressures (e.g., REACH and CLP regulations) and growing demand from end customers, who prefer materials with a transparent life cycle. Biobased adhesives and sealants, produced from renewable raw materials such as vegetable oils, starches, or lignin, represent one of the fastest-growing categories. Their advantages include not only reducing dependence on fossil resources but also the potential for biodegradability or compostability, depending on the specific application.

However, development in this area is not without challenges. Biobased raw materials often require formulation adjustments to achieve comparable strength, moisture resistance, or thermal stability to their synthetic counterparts. For example, starch-based adhesives can be sensitive to moisture, limiting their use in outdoor applications. Manufacturers are therefore investing in research into additives that improve the properties of these materials—such as modified polyols or natural surfactants. Another important trend is the combination of biobased components with recycled materials, further reducing the environmental impact of the final product.

Recyclability and the Circular Economy: New Requirements for Formulations

The circular economy imposes entirely new demands on adhesives and sealants, particularly regarding their recyclability or separability from bonded materials. Traditional adhesives often complicate the recycling process because they create strong bonds that are difficult to break without damaging the underlying materials. This issue is particularly sensitive in sectors such as the automotive industry or packaging technology, where recycling is becoming the standard. The solution lies in so-called 'debonding-on-demand' technologies, which allow joints to be separated through the application of heat, UV radiation, or specific chemicals. These systems are still in the development phase but are already finding applications where recycling is a priority.

Another approach involves the use of thermoplastic adhesives, which can be easily separated and reused after heating. These adhesives, often based on polyolefins or polyesters, are suitable for applications with lower mechanical strength requirements, such as in the packaging industry. For more demanding applications, hybrid systems combining biobased components with recyclable polymer matrices are being tested. The key challenge remains finding a balance between recyclability and performance – the adhesive must be strong enough for the given application while also enabling efficient recycling of the bonded materials. Manufacturers are also seeking ways to minimize the amount of adhesive required for bonding, which reduces both costs and environmental impact.

Photo: Vitaly Gariev / Unsplash

Performance vs. ecology: How to find a compromise in industrial applications

One of the biggest myths surrounding biobased and recyclable adhesives is the notion that eco-friendly products necessarily mean a compromise in performance. The reality, however, is more complex – modern formulations can achieve comparable or even superior properties to traditional synthetic alternatives. For example, adhesives based on epoxy resins from vegetable oils exhibit excellent adhesion to metals and composites, while their mechanical properties are comparable to petrochemical epoxies. Similarly, polyurethane adhesives from biobased polyols achieve high flexibility and chemical resistance, making them suitable for demanding applications in the automotive or construction industries.

Selecting the right adhesive or sealant for a specific application requires careful consideration of technical requirements and environmental goals. For instance, in the food industry, key factors include food-contact certifications and ease of cleaning, while in construction, long-term weather resistance is a priority. Manufacturers therefore often offer "tailor-made" solutions, combining biobased components with additives to enhance specific properties. An important tool for verifying performance is standard testing methods, which evaluate properties such as bond strength, resistance to temperature fluctuations, or chemical stability. Environmental aspects are then assessed through life cycle analysis (LCA), which quantifies the product's impact from production to disposal.

The Future of Adhesives and Sealants: Innovations and Trends for the Next Decade

The future of industrial adhesives and sealants will be shaped by several key trends that combine technological progress with sustainability requirements. One of the most significant directions is the development of "smart" adhesives that respond to external stimuli – such as changes in temperature, pH, or mechanical stress. These materials can be used in self-healing systems or applications requiring controlled degradation. Another promising trend is adhesives with low volatile organic compound (VOC) content, which improve working conditions and reduce emissions of harmful substances. This trend is driven by stricter environmental regulations and growing demand for health-safe materials.

In the field of biobased materials, further development in the use of waste raw materials, such as lignin from the paper industry or chitin from seafood, is expected. These materials not only reduce production costs but also contribute to the circular economy. Digitalization will also play a significant role – for example, the use of artificial intelligence to optimize formulations or 3D printing of adhesives for precise and material-efficient applications. For manufacturers and processors, it is crucial to monitor these trends and invest in research and development to remain competitive in a rapidly changing environment. Sustainability is no longer an option but a necessity, and companies that can combine ecological benefits with technical excellence will have a significant advantage in the coming years.

Photo: Vitaly Gariev / Unsplash

Biodegradable Components: When Nature Sets the Pace

The development of adhesives and sealants with biodegradable components represents one of the most significant innovations in recent years. Traditional synthetic polymers, such as epoxies or polyurethanes, are gradually being replaced by alternatives based on starch, cellulose, chitin, or even waste products from the food industry. These materials not only reduce dependence on fossil resources but also minimize the ecological footprint at the end of the product's lifecycle. For example, starch-based adhesives achieve up to 80% biodegradability within 6 months in composting conditions without compromising adhesive strength.

However, the stability of these materials under extreme conditions remains a challenge—high temperatures, humidity, or mechanical stress can accelerate degradation. Research is therefore focusing on modifying natural polymers through enzymatic or chemical processes to enhance their resistance. For instance, cellulose esterification improves mechanical properties without compromising biodegradability. For industrial applications, finding a balance between performance and environmental benefits requires close collaboration between chemists, materials engineers, and product lifecycle experts.

Water-based adhesives and sealants: A low-emission alternative for sensitive applications

Water-based adhesives and sealants are experiencing a renaissance due to stricter emission regulations and growing demand for safer working environments. Unlike solvent-based systems, which release volatile organic compounds (VOCs), water-based formulations minimize health risks for workers and reduce environmental impact. Typical applications include the woodworking industry, packaging production, and automotive interiors, where air quality requirements are particularly stringent. Modern water-based systems achieve shear strengths of up to 10 MPa, comparable to traditional solvent-based adhesives.

The main challenge remains resistance to moisture and long-term stability. While solvent-based adhesives form a hydrophobic film, water-based systems can be more prone to swelling or loss of adhesion when exposed to water. The solution lies in hybrid formulations that combine water-based polymers with a small proportion of reactive components, such as isocyanates or epoxy resins. These systems provide a compromise between ecology and performance while meeting low-VOC requirements under REACH regulations and CLP/GHS directives. For manufacturers, it is crucial to optimize drying processes to avoid issues with moisture condensation during application.

The Impact of Legislation on the Development of Sustainable Adhesives: What the Future Holds

Legislation plays a key role in accelerating the transition to sustainable adhesives and sealants. REACH regulations and the Restriction of Hazardous Substances (RoHS) Directive already significantly limit the use of certain synthetic components, such as phthalates or formaldehyde. From 2025, stricter requirements for the recyclability of packaging and products are expected, which will directly impact adhesive formulations used in the automotive, electronics, and construction industries. Manufacturers must therefore prepare for the necessity of replacing hazardous substances with alternatives that have a lower environmental impact.

Another significant trend is the introduction of Extended Producer Responsibility (EPR) systems, which compel companies to bear financial and operational responsibility for the recycling of their products. This will lead to greater demand for adhesives that enable easier disassembly and material separation at the end of their lifecycle. For example, in the automotive industry, adhesives with thermally reversible bonds are already being tested, allowing joined parts to be separated at temperatures around 120 °C. For adhesive manufacturers, this means the need to invest in research and development, but also an opportunity to gain a competitive advantage in a market with growing sustainability demands.

Looking for a sustainable alternative for your adhesives or sealants?

GCG Group offers a wide range of biobased and recyclable raw materials for the production of adhesives and sealants, including detailed technical data sheets and safety data sheets (SDS). Our experts will help you select the optimal solution for your application – with a focus on performance, sustainability, and legislative compliance. Contact us – or browse our catalog of over 1,300 products.