Born2Bond™ Ultra K85 from Bostik is an instant engineering adhesive processed from 60% bio-based raw materials. The adhesive withstands up to 1,000 hours of a typical double 85 test, where adhesives are exposed to 85 °C heat and 85% relative humidity, delivering premium performance, while not compromising on safety, health, or the environment.

The adhesive has been created for design engineers, product designers, and manufacturers looking for an ultra-durable adhesive that provides exceptional resistance to humidity and high temperatures, with very low water absorption rates. It offers greater protection to products exposed to variable environmental conditions, such as consumer electronics, outdoor lighting, children’s water toys, electric toothbrushes, medical devices, and automotive parts.

The adhesive retains 97% of its strength up to 1,000 hours, with its threshold being over five times greater than the best benchmark of its competitors. When tested on acrylonitrile butadiene styrene (ABS) specifically, it can withstand up to 2,500 hours of the double 85 test. It also retains 87% of its strength after 168 cycles between -40 °C and 80 °C.

The adhesive is made from 60% bio-based raw materials, helping to support users’ sustainability targets without compromising on performance. The product benefits from Bostik’s parent company Arkema’s Pragati sustainable castor bean farming program. 

The formulation has low exothermicity, which is important for delicate surfaces such as circuit boards that can be damaged when exposed to high heat. This also reduces emitted fumes, which combined with its mild odor, make its use safer and more comfortable for the end user.

Ultra K85 is also much less brittle than similar cyanoacrylates and better at bonding dissimilar materials, whether they be metal, plastic, glass, or wood. When applied to a flexible substrate and bent, Ultra K85 will not result in small cracks that can occur with standard cyanoacrylates. Ideal for luxury goods and consumer electronics product designers looking for premium aesthetics, Ultra K85 has low bloom properties, leaving less white residue once cured.

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