Sika has taken the development of polyurethane technology a major step forward. The innovation launched under the Purform® brand offers significant advantages in terms of performance and durability, which makes construction processes more efficient and shortens construction periods.

Adhesives and sealants manufactured on the basis of polyurethane are widely used in construction and industry. Depending on the individual product used, after curing they are either extremely strong or elastic and durable. This makes them indispensable in the building sector and vehicle industry. These adhesives and sealants can only be used at or above temperatures of 5°C, however. At lower temperatures, the curing process is much slower.


This is where Purform® offers significant advantages. Sikaflex®-1a Arctic, a sealant that already uses the new technology, can be applied at low temperatures, meaning that work on building sites can continue uninterruptedly. With Purform®, only those polyurethane molecules with outstanding properties are used. This improves performance and durability, thereby enhancing the sustainability profile. The new technology simplifies surface preparation, improves adhesive properties, and makes stress cracking-free bonding of plastics possible. That makes application even more efficient. At the same time, the most stringent work safety requirements are satisfied:

  • Extremely easy to apply
  • Fast curing
  • Very resistant to weather and UV lightexposure
  • More durable and more sustainable
  • Maximum protection for users


Bonding and Sealing Even in Minus Temperatures

Bonding and Sealing Even in Minus Temperatures
Down to
is the temperature where Sikaflex®-1a Arctic can be used thanks to Purform®

Enhanced Safety

The new polyurethane technology has an ultra-low monomer content. This means that the Purform® technology already satisfies the requirements in terms of the maximum occupational exposure limits (OELs) for chemical substances and the strict REACH regulations that will apply in the EU from 2023 and are designed to enhance health safeguards, as well as future more stringent OELs.