Certifications and Memberships

STOPAQ has obtained the following approvals:


ISO 9001

STOPAQ is an ISO certified company, which means it has designated the ISO 9001:2015 Standard as the QMS standards to follow.

STOPAQ’s Quality Management System also complies with the KIWA BRL K 911 for the tank installation industry, and the NSF for Drinking Water. STOPAQ procedures and processes are audited both internally and by external entities to ensure compliance with both standards.


KIWA Certification and Inspection

KIWA Certification and Inspection is specialized in the issue of quality certificates for products, processes, management systems and persons. KIWA Certification and Inspection operates at both national and International level in various market sectors, such as the drinking water, effluent and waste disposal industries, the construction industry (residential and non-residential construction), civil engineering, the chemical and petrochemical industries, transport, CE marking, mobility and automotive, agriculture, feed & Food in addition to the care, environmental and business services sectors.


NSF International Approval 

NSF International, The Public Health and Safety Company™, a not-for-profit, non-governmental organization, is the world leader in standards development, product certification, education, and risk-management for public health and safety.

NSF has earned the Collaborating Center designations by the World Health Organization (WHO) for Food and Water Safety and Indoor Environment. Serving manufacturers operating in 80 countries, NSF was founded in 1944 and is headquartered in Ann Arbor, MI USA. The NSF Mark is recognized for its value in international trade around the world and is respected by regulatory agencies at the local, state, and federal levels.

Industry Leading Certification

  • STOPAQ Corrosion Prevention & Sealant systems are certified according to the KIWA BRLbk911/02, TUV Nord for the ISO 12068, class C50. The systems are approved and tested from minus 45°C to 95°C according to ISO 21809-3. STOPAQ’s primary layers within a system consist of a fully amorphous, non-crosslinkable, non-polar polymer composition which is totally impermeable once applied. The products have a low surface tension and due to their fluid-like nature cannot catholically disbond. Corrosion through osmosis or MIC is not possible. 

Versatile Standards

  • The glass transition temperature is lower than minus 60°C. STOPAQ may be applied even in cryogenic situations. A roughness profile to create better adhesion is not necessary; it is sufficient that the substrate is clean and dry.Underwater application and immediate adhesion products are also available. STOPAQ is NSF/ANSI 61 approved with additional offshore approvals from the SouthWest Institure for smoke and toxicity

Members of: