Engineered performance.
Trusted circular advantage.

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A new material pathway
begins here.

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Waste streams become
value streams.

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Engineered for how industry actually works.

encircol material development is designed around process compatibility from the outset. Testing, validation and application development are built into the process, not an afterthought.

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Ambition meets
specification.

Materials used in construction, energy and manufacturing are not chosen because they sound responsible. They are chosen because they work. They must be processable, repeatable, reliable, safe, certifiable and commercially relevant.

encircol begins from that reality — not from a sustainability campaign, but from an engineering discipline.

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Industrial manufacturing
BioPRO® manufacturing process

BioPRO® is not a concept.

It is certified and in commercial production — proven across aviation, automotive and mass transit interiors through Scottish Leather Group.

The same technology is now being applied to engineered material formats for demanding industrial applications — tested, processable, form-fitting.

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Tested to industrial
specification.

encircol materials are not chosen on environmental credentials alone. They are chosen because they work — tested, certifiable, and designed to fit the processes and specifications that industry actually demands.

Already in commercial production

BioPRO® is not an experimental concept. It is certified and in commercial production today — proven across aviation, automotive and mass transit interiors through Scottish Leather Group.

Process-compatible by design

encircol materials are designed for standard industrial processing from the outset — injection moulding, shaped formats, compression. Not a laboratory sample — a manufacturable material.

Quantifiable environmental advantage

Subject to formal LCA. Lower embodied carbon relative to incumbent material formats. A material claim backed by data — not a sustainability narrative detached from performance.

Waste stream to value stream.

From collagen-rich by-product to higher value material programme.

Scottish leather manufacturing generates a collagen-rich stream that has historically had limited material pathways. encircol exists to change that — by applying engineering rigour to create materials that carry a strong relative environmental advantage, and earn their place in demanding industrial supply chains.

01

Collagen stream

A high-value biological resource generated as a by-product of leather manufacturing.

02

BioPRO® technology

Proprietary technology applying engineering rigour and process chemistry to transform the collagen stream.

03

Engineered material

Precision-engineered bio materials with properties competitive with conventional alternatives.

04

Industrial application

Construction, energy and advanced manufacturing sectors — materials that earn their place through performance.

BioPRO® technology

Built on proven BioPRO® technology

The technical foundation behind the encircol material technology. BioPRO® is already produced, certified and in market — as the interior element of seating solutions in aviation, automotive and mass transit sectors through Scottish Leather Group.

Against that proven background, encircol is developing application of the technology into advanced industrial formats — materials that carry a strong relative environmental advantage and earn their place through performance.

Industrial foundation

BioPRO® is produced and certified by Scottish Leather Group — the industrial partner behind encircol.

BioPRO technology in production

A better material pathway.

By-product valorisation

Starting from a collagen stream that might otherwise have limited end-use options — not from a virgin or primary resource.

Lower embodied carbon potential

Relative to a range of incumbent material formats, subject to formal LCA. The relative advantage is the claim — not perfection.

Cleaner chemistry

Reduced reliance on petrochemical precursors versus some conventional alternatives. Natural protein content replacing synthetic inputs.

Environmental performance data is subject to ongoing testing and validation. Claims will be substantiated through formal certification and independent assessment. encircol does not claim full circularity — "circular advantage" and "relative circularity" are the appropriate framings.

Rooted in over 200 years of Scottish manufacturing.

encircol is part of Scottish Leather Group — one of the world's leading manufacturers of high-quality leather, with operations in Bridge of Weir, Scotland.

SLG's manufacturing heritage, collagen expertise, net-zero Scope 1 & 2 credentials and responsible production practice form the credibility foundation on which encircol is built.

200+

Years of manufacturing

Net zero

Scope 1 & 2 emissions

60+

Countries supplied

No. 1

Lowest carbon leather

SLG circular manufacturing process

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FAQs

Common questions

Everything you need to know about encircol and BioPRO®.

About BioPRO®

encircol is an engineered bio materials company developing high-performance materials for demanding industrial applications. Built on proprietary BioPRO® technology, encircol is part of Scottish Leather Group and delivers circular advantage for industries that demand genuine performance.

encircol uses BioPRO technology — a proprietary bio-based material already certified for seating applications in aviation, automotive, and mass transit — and is applying that same technology across a range of demanding industrial sectors.

BioPRO is encircol's proprietary engineered bio material, built on a collagen-based co-product from Scottish Leather Group's manufacturing operations. It combines the science of collagen chemistry with modern materials engineering to deliver circular advantage for industrial use.

encircol is an initiative of Scottish Leather Group, one of the world's leading manufacturers of high-performance leather with over 140 years of industrial heritage. encircol draws on that deep expertise in collagen science to engineer the next generation of bio-based industrial materials.

BioPRO is already certified for seating applications in aviation, automotive, and mass transit. encircol is now working to apply the same technology across further demanding industrial sectors, in close partnership with specifiers, OEMs and industry partners.

Yes. encircol's materials deliver circular advantage, engineered from a co-product of existing manufacturing rather than virgin resources. This gives BioPRO a genuinely lower environmental footprint, without compromising on the performance industrial applications demand.

encircol is based in Scotland, UK, operating within Scottish Leather Group's established manufacturing infrastructure and engaging with partners internationally.

Enquiries about BioPRO, partnership opportunities, or Scottish Leather Group's work with encircol can be made through the contact page at encircol.com.

Engineered for high performance
Bio-based by design
Circular by nature
Proven in production