11 European institutes have tested this product. Here's what they found.
Controll Innerseal has been independently tested across six countries by leading research institutes, government health bodies, and a Swedish nuclear power operator. Every claim on this site is backed by third-party verification — not marketing.
See the findingstesting institutes
Spain · UK · EU
protection standard
history
What Innerseal has been tested for
Eleven institutes across six countries — testing different properties, in different conditions, with different methodologies. The verdict is consistent.
Field-tested inside a nuclear power plant
Of every test Innerseal has passed, this is the one that matters most to specifiers.
Used to protect the reactor wet-well at a working nuclear plant.
As part of a long-term field study, Vattenfall — Sweden's state-owned energy company — used Controll Innerseal to protect and extend the lifespan of the concrete structure inside the wet-well (reactor cooling chamber) of the Forsmark 3 nuclear power plant.
The wet-well is one of the most aggressive environments in any building: continuous immersion, radiation, thermal cycling, and zero tolerance for material degradation. Innerseal was selected after passing Vattenfall's environmental classification, earning a GREEN-2 rating — confirming reliable performance under strict operational conditions while meeting high environmental standards.
The numbers from independent testing
Specific findings from specific tests — verified by third parties, not marketing copy.
Less water absorption on treated brick versus untreated samples
pH increase after treatment — critical for preventing rebar corrosion
No volatile organic compounds, no formaldehyde, no harmful substances
Every institute, every test
Eleven independent organisations. Each tested a different property. Each published findings. Full reports available for in-person review at our offices on request.
Water
Health assessment of contact with drinking water. Confirmed no VOCs and no substances harmful to human health.
Enviro
Swedish non-profit backed by the country's largest property developers and construction firms. Evaluated for sustainable buildings.
Water
Government public-health body evaluated safety for surfaces in contact with potable water — tanks, reservoirs, and water-sensitive applications.
Enviro
Leading Swedish environmental and health certification body for construction. Innerseal, Innerseal Plus, and Topseal all rated.
Concrete
Tested water absorption resistance of treated bricks vs untreated samples in laboratory conditions.
Regulation
Manufacturer Betongtett AS audited annually under System 2+. Continuous compliance with EU harmonised standards for construction materials.
Enviro
Tested for VOCs, formaldehyde, and known carcinogens using among the strictest standards in the world.
Field test
Used to protect concrete in the reactor wet-well (cooling chamber) of an operating nuclear power plant — high-moisture, high-stress environment.
Concrete
Independent verification that the product meets all key requirements under NS-EN 1504-2, the European standard for concrete surface protection.
Concrete
One of Norway's leading independent research institutes. Confirmed effectiveness in limiting moisture penetration and improving long-term durability.
Concrete
Comparative test of pH levels in concrete before and after treatment. Critical for preventing rebar corrosion and enabling rehabilitation over demolition.
Full test reports available on request. Detailed methodology and results from these tests are not published publicly to protect competitive information, but are available for in-person review at our offices, or for sharing with specifiers and architects working on specific projects. Email us to request access.
See the documentation. Specify with confidence.
The Documentation page has every PDF you need for tender specification, COSHH assessment, and project sign-off — TDS, SDS, Declaration of Performance, and CE Marking Certificate. Or browse the products.