Key takeaways:
SMX® technology delivers strength plus flexibility, with fast cure and paintability.
Ultra-low VOC, solvent and isocyanate free, with low odour.
Bonds and seals indoors and outdoors, even in wet conditions.
Used across Soudal’s Multibond and T-Rex SMX product lines in Australia.
SMX® technology represents Soudal’s next generation of sealant and adhesive innovation, delivering strength, flexibility, and sustainability in one formula.
What is SMX® Technology?
How do you achieve exceptional strength and superior elasticity in a sealant or adhesive? How can products be paintable within the hour yet cure underwater? How do you remove solvents, isocyanates, and VOCs without losing performance?
That’s the science behind SMX® technology, a Soudal innovation developed to meet the toughest site conditions while supporting healthier environments.
The Science Behind SMX®: Soudal Modified Extensions
SMX® stands for Soudal Modified Extensions and reflects decades of in-house research and development. By combining the best properties of silicones, polyurethanes, and acrylics, Soudal has created a hybrid polymer system that strengthens elasticity, adhesion, and durability, all without compromising ease of use.
Benefits of SMX® Technology
SMX® formulations deliver:
Exceptional strength and flexibility
Excellent toolability and fast curing
Paintability within the hour
Curing even on damp surfaces
Ultra-low VOCs with no solvents or isocyanates
Mould resistance and low odour
Consistent performance across temperatures, indoors and outdoors
How SMX® Improves Your Work
SMX® technology powers a versatile range of high-performance sealants and adhesives designed for professional use. Whether you’re sealing, bonding, or finishing, SMX® products provide long-term reliability, improved air quality, and faster finishing times, helping you deliver outstanding results with less downtime.
Continuous Innovation: Perfecting SMX® Technology
Soudal’s global R&D team continues to advance SMX® formulations, integrating the latest polymer chemistry to boost on-site performance and sustainability. This commitment keeps Soudal at the forefront of hybrid adhesive and sealant technology, so every project benefits from materials engineered for modern construction needs.
Why Choose SMX®
SMX® technology is built on science and refined by decades of experience. It offers the edge professionals need for top-quality sealants and adhesives that meet demanding building standards while reducing environmental impact.
Ask the Soudal Australia team which SMX® solution best fits your application, or find your nearest distributor.
SMX® Technology FAQs
Can SMX® adhesives and sealants be used on wet or humid substrates?
Yes. SMX® cures with ambient moisture and tolerates humid conditions. Remove standing water before application. For permanent immersion, use a product rated for underwater use.
Are SMX® products paintable?
Yes. Most SMX® sealants and adhesives can be painted once skin formation occurs, usually within an hour. Always test compatibility first.
How does SMX® compare to polyurethane (PU)?
SMX® delivers similar strength and flexibility to PU but with faster cure, no solvents or isocyanates, and improved UV and ageing resistance.
What movement capability can I expect from SMX® sealants?
Most SMX® sealants accommodate ±20–25% joint movement, making them suitable for dynamic joints and expansion areas.
What are the best use cases for SMX®?
SMX® technology suits bonding and sealing across construction, manufacturing, and automotive sectors — including façades, flooring, metalwork, joinery, and general assembly.