AllShield FerroShield - Mineral protection against corrosion
Mineral ultra-thin coating protecting steel against corrosion and acids
AllShield FerroShield is a mineral-based protective coating that bonds directly to untreated or even rusted steel. By forming a durable chemical bond at the molecular level, it creates a long-lasting barrier against corrosion and strong acids. Unlike traditional coatings, FerroShield requires no blasting or heavy surface preparation, making it a faster and more sustainable solution.
The coating is applied in one or more ultra-thin spray layers, with thickness measured in microns and negligible weight compared to the steel itself. Its white finish delivers a clean appearance while preserving the strength and conductivity of the underlying material.
Because FerroShield is heat-conductive, it is not intended for fire protection. Its strength lies in corrosion resistance, chemical durability, and long-term performance even in aggressive environments. By combining ease of application with molecular-level adhesion, FerroShield extends the lifetime of steel structures without altering their mechanical properties.
How FerroShield works
FerroShield does not simply form a mechanical coating on top of steel; it bonds chemically at the molecular level with the surface. This unique reaction creates a stable mineral layer that prevents rust from developing and progressing. Because the protective film is measured only in microns, the additional weight on the structure is negligible. Despite its minimal thickness, FerroShield delivers strong resistance against both corrosion and aggressive acids, ensuring durability even in harsh environments. The coating can be applied directly to untreated or rusted steel without blasting or heavy preparation, making it both efficient and sustainable. Unlike insulating layers, FerroShield remains heat-conductive, which means it does not provide fire protection but fully preserves the structural and thermal properties of steel.
Easy application
FerroShield is a two-component mineral coating developed for the preservation of steel. Applied in microns-thin spray layers, it bonds on a molecular level with the steel surface to provide lasting resistance to corrosion and acids. Unlike conventional paints, it does not rely on thickness to protect but on chemical adhesion, ensuring that protection is achieved even on rusted substrates. With its negligible weight, white finish, and sustainable mineral composition, FerroShield offers a new generation of steel protection without the need for blasting.
Certifications and Compliance
AllShield FerroShield
Testing and certifications are ongoing. FerroShield builds on the AllShield mineral technology platform, validated in multiple independent laboratories for durability, chemical resistance, and long-term performance.
A1 Certification AllShield Blue coating
→ A1 Non combustable certification.
→ Caloric bomb test.
Product information AllShield FerroShield
FerroShield is a two-component mineral coating developed for the preservation of steel. Applied in microns-thin spray layers, it bonds on a molecular level with the steel surface to provide lasting resistance to corrosion and acids. Unlike conventional paints, it does not rely on thickness to protect but on chemical adhesion, ensuring that protection is achieved even on rusted substrates. With its negligible weight, white finish, and sustainable mineral composition, FerroShield offers a new generation of steel protection without the need for blasting.
| Composition | Two-component mineral blend |
| Thickness | Micron-scale (per layer) |
| Weight | Negligible compared to steel |
| Colour | White |
| VOC | 0 g/L |
| Application | Spray, certified applicator |
| Coverage | Depends on steel surface condition |
| Shelf life | 6 months (unopened, dry storage at 5–40 °C) |
| Compatible with | Steel and rusted steel |
| Bonding | Molecular adhesion to steel |
| Surface finish | Thin, seamless, corrosion- and acid-resistant |
Projects AllShield FerroShield
Protecting what matters. Insurability starts with evidence. Our projects with AllShield FerroShield show how passive fire protection, low added roof load and documented system performance can be integrated into real commercial roof-PV projects
Frequently asked questions (FAQ)
What is AllShield?
AllShield develops mineral-based coatings and barriers for fire safety, acid resistance and structural durability — with no plastics, no PFAS and a low CO₂ footprint.
Are AllShield products really non-combustible?
Yes. AllShield Blue and BarrierSheets are A1 certified.
Are your products compatible with common materials?
Yes. Proven on over 80% of standard materials including steel, EPS, PIR, PUR, bitumen, PVC, TPO, EPDM (for BarrierSheet), wood and concrete.
What types of buildings use AllShield?
Industrial, commercial and critical infrastructure buildings, especially those with flat roofs, PV systems, chemical zones or aging membranes.
Are your products sustainable?
Yes. AllShield products are VOC-free, REACH-compliant and developed to reduce the environmental impact of the built environment.
Can AllShield BarrierSheet and AllShield Blue be used with PV systems?
Yes. AllShield BarrierSheet is our standard solution for PV roof assemblies and is FM 4478 Approved for applicable roof assemblies. AllShield Blue is FM 4484 Approved and remains available as a specialty solution for selected existing roof applications.
Do they extend the lifespan of roofs?
Yes. AllShield Blue coating offers UV, mechanical and chemical resistance; BarrierSheet protects membranes and insulation as a cover board below a new roofing membrane.
Are they waterproof?
AllShield BarrierSheet is not a waterproofing layer and must always be covered by a waterproof roof membrane. AllShield Blue forms a seamless protective coating but is not intended to replace the primary roof waterproofing system or to repair an existing leaking roof.
Can AllShield BarrierSheet and AllShield Blue be used for roof refurbishment?
Yes. AllShield BarrierSheet is our standard solution for roof refurbishment and PV retrofits and is installed beneath a new waterproofing membrane. AllShield Blue can be applied directly to suitable existing waterproofing membranes in selected projects where retaining the existing membrane provides a clear practical advantage.
What about insurers?
AllShield Blue is FM 4482 and FM 4484 Approved. AllShield BarrierSheet is FM 4470 and FM 4478 Approved. Acceptance by an insurer always depends on the complete roof and PV assembly and the project-specific risk assessment.
