Bostik Ultra K85 eco-friendly adhesive – 60% bio-based and ultra strong

60% bio-based and eco-responsible
High strength on all materials
Resistant to heat and humidity
Odorless and easy to apply

Quote

Get a quote for this product

Would you tell us more ?

Step 2/2 back

Thank you !

You request has been sent.

We promise to respond to you in detail within 24 hours.

In the meantime, feel free to browse our other products.

Overview

Bostik Ultra K85 – A high-performance eco-friendly adhesive

Bostik Ultra K85 is a bio-based instant adhesive (60%) designed for professionals who want to reduce their environmental impact without compromising technical performance.

Thanks to its formulation from renewable raw materials, it combines strength, durability, and environmental responsibility — a true green alternative to conventional cyanoacrylates.

🌱 60% bio-based composition
⚙️ Fast fixture time: 15 seconds
💧 Resistant to heat and humidity up to 100°C
🧩 High bonding strength on multiple materials

A green adhesive as strong as a classic cyanoacrylate

Don’t be fooled by its “eco” profile — Ultra K85 performs like the best industrial adhesives on the market.

With a mechanical strength up to 15 MPa and a record-breaking 1,000 hours resistance at 85°C / 85% relative humidity, it is the world’s first instant adhesive to reach such performance, ensuring long-lasting bonds even under the toughest conditions.

Applications of the low-odor Ultra K85 adhesive

Ultra K85 is suitable for a wide range of industrial applications requiring speed, strength, and eco-friendly reliability.

Typical uses include maintenance, general assembly, toy manufacturing, prototyping, medical devices, automotive, and consumer electronics.

Sector	Typical applications
Electronics	Bonding of sensors, housings, and connected modules
Automotive	Fixing small interior and decorative components
Maintenance & prototyping	Quick repairs and multi-material assemblies
Medical devices	Non-invasive bonds compliant with ISO 10993-5
Outdoor products	Assemblies exposed to moisture and temperature cycles

📞 Need a custom solution? Our technical team can recommend the best formula for your materials and constraints.

→ Contact us for a quote

Eco-friendly advantages of Bostik Ultra K85

60% bio-based, made from renewable raw materials (Arkema Oleris® technology)
Low odor and low blooming for cleaner, more pleasant application
Solvent-free, with low VOC content (63 g/L only)
Simplified handling and storage, no major hazard labeling
Ideal for eco-design and sustainable manufacturing processes

Technical data of Bostik Ultra K85

Property	Typical value
Base chemistry	n-Heptyl cyanoacrylate
Bio-based content	60%
Fixture time	~15 s depending on substrate
Shear strength	8–15 MPa
Temperature range	–40°C to +100°C
Viscosity (25°C)	140–200 cP
Appearance	Transparent
Heat/humidity resistance	1,000 h at 85°C / 85% RH
Packaging	20 g or 500 g
Shelf life	12 months at 2–8°C

Why choose Bostik Ultra K85

🌍 Lower carbon footprint with the same performance as traditional cyanoacrylates
⚡ Fast, durable, and clean bonding
🔬 Perfect for both technical and aesthetic applications
🤝 Backed by Arkema and Bostik’s research and quality standards

FAQ – Everything you need to know about Ultra K85

Is this adhesive really eco-friendly?
Yes, it’s made with 60% bio-based raw materials from non-food plant sources.

Does it perform as well as a traditional cyanoacrylate?
Absolutely. Ultra K85 achieved 1,000 hours of resistance to heat and humidity, unmatched by standard cyanos.

Which materials can it bond?
Metals, plastics (ABS, PC, PVC), wood, leather, composites, glass — except untreated polyolefins.

What is the fixture time?
Around 15 seconds, depending on the materials.