A new type of adhesive, made from natural ingredients found in mistletoe berries, has shown the ability to stick to difficult-to-bond surfaces like Teflon, as well as common materials like wood, metal, and glass. Developed by researchers led by Professor Oliver Lieleg from the Technical University of Munich (TUM), this bio-based adhesive is primarily made from a natural sugar mixture found in mistletoe berries, along with tannic acid and malic acid—both of which are naturally occurring compounds. One of the adhesive’s key features is its ability to be reactivated multiple times by applying heat after it has been used and separated, which could make it valuable for repair and recycling applications, especially in electronics. In laboratory tests, the adhesive proved effective on a wide range of materials, including birch wood, stainless steel, aluminum, and glass. On Teflon, a notoriously difficult surface to bond, the adhesive formed strong joints capable of withstanding significant force, with shear strengths exceeding 10 megapascals—comparable to those of traditional industrial adhesives. The adhesive also performed well in extreme cold, maintaining its bonding strength at temperatures as low as -150°C (-238°F). It can be detached and reactivated by heating it to about 90°C (194°F), a property that could make it useful in environments where components need to be replaced or recycled, such as in space technology, where traditional adhesives often fail under extreme conditions. Despite these promising results, the current production method relies on processing mistletoe berries, which limits its potential for large-scale use. Mistletoe is a parasitic plant, and harvesting its berries in sufficient quantities for industrial purposes is not feasible at this stage. To address this, the researchers are working on developing industrial processes that can replicate the adhesive’s molecular structure without relying on the plant itself. This would allow for more sustainable and scalable production of the adhesive components. The findings of this research were published in the journal Advanced Materials under the title "High‐Performance Bio‐Glue From the Berries of a Parasitic Plant." The study highlights the potential of using natural, renewable resources to create high-performance materials that could replace conventional adhesives in various industries, from consumer electronics to aerospace engineering.