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Key / explanations of the logos and symbols

On this page, you will find explanations, background information and links for all logos and symbols on our website. Click on one of the logos listed and you will be taken directly to the explanation.

Explanations of the logos in detail

No Fly Ash – HENSOTHERM® M 2000 is a fire protection mortar of the latest generation!
The supply of fly ash as a raw material will be no longer guaranteed in the future. For this reason we already produce HENSOTHERM® M 2000 without it.

Green Product
Our development work focuses on the environmental compatibility and sustainability of our HENSOMASTIK® and HENSOTHERM® fire-protection coating systems for use in passive constructional fire protection. Over the years, this has developed into our ‘Green Product’ line, which includes those fire-protection products which do not contain volatile organic compounds (non-VOC products) and thus qualify as building materials for ecological construction.

Made in Germany
Our HENSOTHERM® and HENSOMASTIK® fire protection coating systems are developed and manufactured exclusively at our company base in Börnsen near Hamburg.

Member of DGNB
The work of the German Sustainable Building Council (DGNB) focuses on designing living spaces so as to be sustainable. The association is the central platform for everyone who is interested in and committed to sustainable construction.
The aim is for our built environment to be planned, built and used in a sustainable way. To this end the DGNB e.V. is developing a certification system which allows an objective assessment and thus the optimisation of our built environment.
We at Rudolf Hensel GmbH support these objectives and make an active contribution to the sustainable design of our future living spaces through our membership of the association (since 2012).

DGNB Navigator
In the DGNB Navigator, a comprehensive online database, several of Hensel’s “Green Product” HENSOMASTIK® and HENSOTHERM® fire-protection products have been registered in the ‘Brandschutzbeschichtungen (fire-protection coatings)’ category since 2014. This database is where architects, planners, developers, and everyone involved in building projects can find detailed information on the products and their environmental impact parameters, for calculating life-cycle costs, energy consumption, or emission behaviour.

Member of IBU
Rudolf Hensel GmbH has been a member of the Institut Bauen und Umwelt e.V. (Institute for construction and environment, IBU) since 2014.
IBU is an initiative set up by building product and building element manufacturers who have decided to join forces to meet the demand for greater sustainability in the construction industry.
As a manufacturers’ association, IBU presents a complete spectrum of environmental product declarations (EPDs) with the Type III ecological label in accordance with ISO and CEN standardisation. The publication of an EPD by IBU involves an independent verification by third-parties and demonstrates the environmental impacts of a product and the company’s sense of responsibility in respect of sustainable construction.

IBU Environmental product declaration (EPD)
Environmental product declarations (EPDs) have already been drawn up for Hensel’s first ‘Green Product’ fire-protection products HENSOMASTIK® and HENSOTHERM® and verified by the Institut Bauen und Umwelt (IBU). These EPDs are Type III environmental labels that relate not only to qualities, but also to quantities on the basis of ISO 14025 environmental declarations and thus allow a direct comparison of products from different manufacturers.

‘Leadership in Energy and Environmental Design’, abbreviated to LEED, is an internationally recognised certification system developed by the U.S. Green Building Council in 1998.
It sets global standards for the development and design of ecological buildings, so-called “Green Buildings” and defines standards for environmentally friendly, resource-conserving and sustainable construction.

LEED v4 – the new LEED. In the future, the specifications relating to emissions from products will be based on the California Section 01350 and on the BIFMA standards for office furniture.
For projects and products outside the USA, the AgBB scheme can be used, to which will be added the formaldehyde value from the French VOC regulation (A+ classification). Further credit points can be earned by UL products and EPDs (Environmental Product Declarations) and ECVs (Environmental Claim Validations).

A+ VOC classification
The product was assessed as having class A+ VOC emissions. The recommended classification is based on the French regulation for labelling building products or wall claddings, flooring, paints, and lacquers with respect to their emissions of volatile contaminants, as published on 25 March 2011 (décret DEVL1101903D) and 13 April 2011 (arrêté DEVL1104875A).

Friend of the fire brigade
Rudolf Hensel GmbH has been an official “friend of the fire brigade” since 2016. As an employer, it not only supports company staff who are volunteer firefighters when they carry out their fire-fighting duties, it is also a long-time supporter of the local volunteer fire brigade in Börnsen and its junior firefighters.

The European Organisation for Technical Assessment (EOTA) was founded as a European organisation for technical approvals on the basis of the Construction Products Directive (89/106/EEC). When the EU Construction Products Directive (Directive (EU) No. 305/2011) came fully into force on 1 July 2013, the name changed, but importantly so did the tasks and the structure of the EOTA.

The Institut für Bautechnik (Institute for civil engineering, IfBt) in Berlin was founded on 1 July 1968. The parties to the agreement – the German federal government and the eleven federal states in western Germany – agreed to transfer responsibility for the granting of general construction authority approvals and further civil engineering-related tasks to the Institute.
To implement the European Construction Products Directive, the legislator appointed the IfBt as the only German approval authority for European construction products in 1991. The federal government thus transferred the collaboration in the European Organisation for Technical Approvals (EOTA) to the Institute.
On 1 January 1993, the new federal states became members of the agreement. The Institute was renamed the Deutsches Institut für Bautechnik (DIBt). The range of tasks to be undertaken by the Institute was expanded to include the granting of European technical approvals.

Lloyds Register ISO 9001
Rudolf Hensel GmbH has been ISO 9001:2008 certified since 1997.

ISO 9001 is the globally recognised standard for the certification of quality management systems. Every company which has already introduced a quality management system can apply to be certified in accordance with ISO 9001. At the same time, ISO 9001 forms the basis of all further industry-specific standards and developments. In many sectors, ISO 9001 certification is already taken for granted or expected.

Conformity mark regulation
The highest construction authorities of the German federal states (Ministers for Building, Housing and Urban Development, Senators for Building) have issued regulations – “Monitoring of building materials and components” (abbreviated to “Monitoring regulation”) – which require that certain groups of items listed in the regulation may only be used if they originate from a monitored production process. The products involved (construction materials and structural elements) are those where health or public safety can be endangered when they fail.


DNV is the world’s leading classification company and a renowned provider of consultancy services to the maritime industry. It makes crucial contributions to the fact that global shipping is becoming safer and the capability, energy efficiency and environmental compatibility of the ships is improving – including all types of ship and offshore installations.

Underwriters Laboratories (UL) was founded in 1894 and is an independent organisation which examines, certifies and monitors products in respect of their safety. It makes the knowledge obtained and the expert knowledge on the products available to the purchasers, and provides advice and information.

UL Environmental product declaration (EPD)
Rudolf Hensel GmbH has achieved an Environmental Product Declaration (EPD) certification from UL Environment. The certification relates to the fire protection system product for steel HENSOTHERM® 490 KS approved in accordance with UL263.

CERTIFIRE – Leading the way in Product Certification for Passive Fire Protection
CERTIFIRE is an independent third party certification scheme that assures performance, quality, reliability and traceability of fire protection products. Recognised by regulatory authorities worldwide, it is an internationally respected mark of fire safety and one of the most authoritative in the industry.

TiBP – Triisobutyl phosphate free
The product does not contain plasticizers! In this case no TiBP – Triisobutyl phosphate free!

„What are plasticisers? Plasticisers are substances which are added to brittle materials to make them soft, ductile, or extendible, so that they can be worked more easily or acquire particular characteristics of use. They can be found in large quantities in plastics, varnishes, coating agents, sealing compounds, industrial and natural rubber articles, and adhesives.“

Product has been tested according to AgBB criteria and approved for use in common rooms.

Singapore Green Building Council

The Singapore Green Building Council forges public-private partnerships to foster innovative industry solutions across the entire building and construction value chain. Through its green building product and green building services labelling programmes, SGBC sets high standards and benchmarks for green building solutions both locally and regionally to help build more sustainable cities for better living. As Singapore’s representative on the World Green Building Council, SGBC actively contributes to the global green building movement by sharing expertise and knowledge during international conferences and events.


Ecobau sets the standard for healthy and ecological construction in Switzerland. The three quality seals eco1, eco2 and ecoBasis are protected designations.

eco1: The product meets the highest requirements of ecobau and Minergie-ECO with regard to ecological and health requirements and therefore receives the eco1 rating: Very suitable for Minergie-ECO 1st priority according to ecoBKP/ecoDevis

BuildingSMART Logo

Together with buildingSMART Germany, we are actively shaping the digitalisation of the construction and real estate industry. buildingSMART Germany brings together BIM users and developers, providers and clients, and many other stakeholders who share an interest in exchange and regional networking for the further development of digitisation in the construction and real estate industry.

IDF Logo

Since 2014, the Stifterverband has been honoring research-based companies for their special responsibility, which they take over for state and society, with the seal “Innovative through research”.


Fireproofing steel with the IGSB
Knowledge – Support – Advise – Promotion

Since the founding of the Interessengemeinschaft Brandschutz-Beschichtungen (IGSB) in 2012, we have been a founding member as a manufacturer of fire protection coatings.

The members of the IGSB have set themselves the aim of promoting the use and understanding of fire protection with intumescent coatings. IGSB sees itself as a centre of competence in all questions concerning intumescent coatings and actively participates in standardisation and related public discussions in order to inform the IGSB its members promptly and keep them up-to-date. At the same time, IGSB also provides advice to all interested parties in the field of fire protection coatings.


Bundesverband Brandschutz e.V.

Bundesverband Brandschutz e.V. is the association for manufacturers of fire protection systems and materials. The association has set itself the goal of maintaining and promoting the high level of preventive fire protection in Germany through the active participation of its members in German and European committees for standardization
and legislation. The overarching protection goals in passive structural fire protection and the technical and organizational developments are made known.

M1 Logo

Emission classification of building materials (M1)
First awarded to products 1996, the Finnish emission label for building products and furniture is one of the leading quality labels in the Scandinavian region. The aim of the classification is to enhance the development and use of low-emitting building materials so that material emissions do not increase the requirement for ventilation. The classification presents requirements for the materials used in ordinary work spaces and residences. M1 is the best category and stands for “low-pollutant”.


We are member of ÖGNI.
The ÖGNI – Austrian Society for Sustainable Real Estate, is an NGO (non-governmental organisation) for establishing sustainability in the construction and real estate industry. The aim of the ÖGNI is to demonstrate
the added value of building certifications in order to create environmentally and resource-friendly buildings, with high economic and social efficiency, which can be used flexibly over generations and have a positive impact on the health, well-being and performance of the users.


BSFZ Seal – Innovation Competence through Research & Development
A seal for (partially) in-house R&D projects as proof of in-house R&D performance.

PFAS free

Free of Perfluoroalkyl Chemicals (PFAS)
The labeled product is free of perfluoroalkyl chemicals (PFAS).
PFAS are a large family of thousands of synthetic chemicals widely used in society and found in the environment. They all contain carbon-fluorine bonds, which are some of the strongest chemical bonds in organic chemistry. This means they are difficult to break down, both in their use and in the environment. Most PFAS are also easily transported in the environment, traveling great distances from the source of their release. PFASs are often found to contaminate groundwater, surface waters, and soils. Cleaning up contaminated sites is technically difficult and costly. If releases continue, PFAS will continue to accumulate in the environment, drinking water, and food.

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