Scaling next-generation bioPolyurethane window frames: Investment opportunity to industrialise sRIM-PUR®

INDRESMAT is a European deep-tech company developing advanced bioPolyurethane (BioPUR) materials to transform the building envelope. At the core of the company is its patented sRIM-PUR® (Serial Reaction Injection Moulding for Polyurethane) technology, a novel manufacturing process enabling the industrial production of high-performance, lightweight and circular construction components.

sRIM-PUR® represents a step-change in how polyurethane-based products are manufactured, combining design flexibility, material efficiency and compatibility with industrial-scale production.

KLIMA-PUR® windows are the first application of this technology, serving as a fully validated industrial and commercial use case. They demonstrate the performance and scalability of sRIM-PUR® in one of the largest and most demanding segments of the construction market.

Through KLIMA-PUR®, INDRESMAT has proven the ability of sRIM-PUR® to deliver:

• Thermal performance: Uf = 0.8 W/m²K (32% better than PVC)

• Acoustic insulation: Rw = 43 dB (full window), up to 50 dB at profile level

• Lightweight structures: 35% lighter than aluminium

• Durability: 30–40 years lifespan

• Circularity: up to 100% recyclable, designed for repair, reuse and recycling

With the technology validated, INDRESMAT is now focused on industrialisation. The objective is to scale sRIM-PUR® into a high-throughput manufacturing platform capable of supplying the European window market and enabling future product lines.

The company is seeking strategic investment to:

• Industrialise and automate the sRIM-PUR® process

• Scale production capacity of KLIMA-PUR® window frames

• Expand commercial deployment across key European markets

This opportunity combines a proprietary manufacturing technology, a validated flagship product, and a clear pathway to industrial scale in a market driven by energy efficiency, sustainability and circularity requirements.