Independently tested. Certified to EN 1504-2. Trusted by specifiers.
Every claim about Controll Innerseal is backed by independent testing from 11 European research institutes — including testing for the nuclear and drinking water industries. Full technical documentation, downloadable below.
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concrete protection
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Download technical documentation
All four core documents required for specification, COSHH assessment, and project sign-off. English language, PDF format.
1504
Technical Data Sheet
Composition, coverage rates, application method, drying times, substrate preparation, and full performance properties.
Download TDSSafety Data Sheet (SDS)
Handling, storage, first aid, and disposal information. Required for site safety files, COSHH assessments, and risk documentation.
Download SDS305
Declaration of Performance
Statement of conformity to EN 1504-2 under CPR (EU) 305/2011. The legal document underpinning the CE mark.
Download DoPCE Marking Certificate
CE certificate under EN 1504-2 conformity assessment. Accepted indefinitely in Great Britain and required across the EU.
Download CEProduct specifications
Quick-reference data for Controll Innerseal. Full details in the Technical Data Sheet above.
| Product type | Silicate-based deep-penetrating concrete impregnation under EN 1504-2 (Surface protection systems for concrete — impregnation method). |
|---|---|
| Coverage rate | ~3 m² per litre across two coats.Highly absorbent surfaces may require a third coat. |
| Application method | Low-pressure sprayer (walls), flood-and-spread with soft broom or squeegee (floors). Two coats with 1-hour interval. |
| Substrate | Concrete, masonry, mortar, brick, render, Leca, concrete blockwork. Substrate must be bare, clean, and dry-to-damp (not wet or saturated). |
| Application temperature | Above +5 °C, substrate and ambient. |
| Drying / curing | Touch-dry within a few hours. Fully cured overnight. Light foot traffic the following day; vehicular use after 48–72 hours. |
| Appearance after application | Invisible. Colourless, odourless. Does not alter surface texture or finish. |
| VOC content | Zero. Solvent-free. |
| Service life | 30+ years. Lasts as long as the treated substrate. |
| Packaging | 5L and 20L containers. |
| Shelf life | Minimum 2 years from date of manufacture, in sealed original packaging, stored above +5 °C. |
| SKU codes | INNERSEAL5L · INNERSEAL20L |
Certified to EN 1504-2
The harmonised European standard for products used in the surface protection of concrete structures.
EN 1504-2 — Surface protection systems for concrete
BS EN 1504-2:2004 · DoP no. 1111-CPD-0556The harmonised European standard for products and systems used in the protection and repair of concrete structures. EN 1504-2 defines three protection methods: hydrophobic impregnation, impregnation, and coating.
Controll Innerseal is classified under impregnation — designed to reduce surface porosity and strengthen the substrate by reacting chemically with cement minerals to form an internal crystalline barrier. Tested for resistance to water penetration, chloride ion penetration, compressive strength, reaction to fire, and vapour permeability.
EN 1504-2 · CPR 305/2011
CE marking is accepted in Great Britain
Following the UK Government's confirmation in 2024–2025 (Morrell-Day Review), CE marking continues indefinitely for construction products in Great Britain. The previously planned mandatory UKCA transition for construction products has been withdrawn. Controll Innerseal's CE marking is therefore valid across both Great Britain and the EU, including Northern Ireland under the Windsor Framework.
Headline results from independent testing
Quantified findings from European materials testing institutes — verified by third parties, not us.
Less water absorption on treated bricks vs untreated samples
pH increase after treatment — critical for preventing rebar corrosion
Vattenfall environmental classification. Field-tested in Forsmark 3 nuclear plant wet-well
Tested by 11 European institutes
From Norway and Sweden to Germany and Spain — independent verification across drinking water safety, concrete chemistry, environmental impact, and field performance. Full reports available for in-person review at our offices on request.
Drinking water health analysis. Confirmed no VOCs and no substances harmful to human health. Safe for surfaces in contact with drinking water.
Highest environmental rating for sustainable construction. Swedish non-profit backed by the country's largest property developers.
Toxicological assessment for drinking water contact. Confirmed completely safe for use on surfaces in contact with potable water.
Class B environmental rating — second-highest in the SundaHus system for sustainable building products.
Water absorption test. Treated brick absorbed up to 20× less water than the untreated sample.
System 2+ annual audit. Manufacturer Betongtett AS certified under the EU Construction Products Regulation. Continuous compliance verified yearly.
Tested for VOCs, formaldehyde, and known carcinogens using among the strictest standards worldwide. Confirmed free from harmful or hazardous substances.
GREEN-2 classification. Field-tested in the wet-well (reactor cooling chamber) of the Forsmark 3 nuclear power plant — a high-moisture, high-stress environment.
Independently verified product meets all key requirements under NS-EN 1504-2, the European standard for concrete surface protection. CPR-compliant.
Water absorption test. Confirmed effectiveness in limiting moisture penetration and improving long-term durability of concrete.
pH increase from 8.8 to 10.1 after application — critical for preventing rebar corrosion and enabling rehabilitation over demolition.
Specifier & trade enquiries
Technical questions, bulk pricing, palletised delivery, project specification support, or copies of full test reports — we reply directly. No chatbots, no AI agents, no contact forms that disappear.