SCHOMBURG GmbH & Co. KG Aquafinstr. 2-8 Detmold NRW 32760, Germany
Agrément Certificate 20/5741
Tel: +49 5231 953 00 e-mail: info@schomburg.de website: www.schomburg.com/de/en
Product Sheet 3 Issue 2
SCHOMBURG WATERPROOF CONCRETE CONSTRUCTION SYSTEM AQUAFIN-CJ6 This Agrément Certificate Product Sheet relates to AQUAFIN-CJ6, a flexible, hydrophilic waterstop for use at construction joints and penetrations in underground reinforced waterproof concrete structures. (1)
(1) Hereinafter referred to as ‘Certificate’.
The assessment includes Product factors: • compliance with Building Regulations • compliance with additional regulatory or nonregulatory information where applicable • evaluation against technical specifications • assessment criteria and technical investigations • uses and design considerations Process factors: • compliance with Scheme requirements • installation, delivery, handling and storage • production and quality controls • maintenance and repair Ongoing contractual Scheme elements†: • regular assessment of production • formal 3-yearly review
KEY FACTORS ASSESSED Section 1. Mechanical resistance and stability Section 2. Safety in case of fire Section 3. Hygiene, health and the environment Section 4. Safety and accessibility in use Section 5. Protection against noise Section 6. Energy economy and heat retention Section 7. Sustainable use of natural resources Section 8. Durability
The BBA has awarded this Certificate to the company named above for the system described herein. This system has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of Second issue: 11 November 2025 Originally certified on 15 April 2020
Hardy Giesler Chief Executive Officer
This BBA Agrément Certificate is issued under the BBA’s Inspection Body accreditation to ISO/IEC 17020. Sections marked with † are not issued under accreditation. The BBA is a UKAS accredited Inspection Body (No. 4345), Certification Body (No. 0113) and Testing Laboratory (No. 0357). Readers MUST check that this is the latest issue of this Agrément Certificate by either referring to the BBA website or contacting the BBA directly. The Certificate should be read in full as it may be misleading to read clauses in isolation. Any photographs are for illustrative purposes only, do not constitute advice and should not be relied upon.
British Board of Agrément 1st Floor, Building 3, Hatters Lane Croxley Park, Watford Herts WD18 8YG
BBA 20/5741 PS3 Issue 2
©2025
tel: 01923 665300 clientservices@bbacerts.co.uk www.bbacerts.co.uk
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SUMMARY OF ASSESSMENT AND COMPLIANCE This section provides a summary of the assessment conclusions; readers should refer to the later sections of this Certificate for information about the assessments carried out.
Compliance with Regulations Having assessed the key factors, the opinion of the BBA is that AQUAFIN-CJ6, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements of the following Building Regulations:
The Building Regulations 2010 (England and Wales) (as amended) Requirement: Comment:
C2(a)
Resistance to moisture The system provides an effective barrier to water under hydrostatic pressure. See section 3 of this Certificate.
Regulation: Comment:
7(1)
Materials and workmanship The system is acceptable. See sections 8 and 9 of this Certificate.
The Building (Scotland) Regulations 2004 (as amended) Regulation: Comment:
8(1)
Fitness and durability of materials and workmanship The system is acceptable. See sections 8 and 9 of this Certificate.
Regulation: Standard: Comment:
9 3.4
Building standards – construction Moisture from the ground The system is an effective barrier to water under hydrostatic pressure, with reference to clauses 3.4.1(1)(2), 3.4.5(1)(2) and 3.4.7(1)(2) of this Standard. See section 3 of this Certificate.
Standard: Comment:
7.1(a)
Statement of sustainability The system can contribute to satisfying the relevant requirements of Regulation 9, Standards 1 to 6, and therefore will contribute to a construction meeting at least a bronze level of sustainability as defined in this Standard.
12
Building standards – conversion All comments given for the system under Regulation 9, Standards 1 to 6, also apply to this Regulation, with reference to clause 0.12.1(1)(2) and Schedule 6(1)(2). (1) Technical Handbook (Domestic). (2) Technical Handbook (Non-Domestic).
The Building Regulations (Northern Ireland) 2012 (as amended) Regulation: Comment:
23(1)(a)(i) (iii)(b)(i)
Fitness of materials and workmanship The system is acceptable. See sections 8 and 9 of this Certificate.
28(a)
Resistance to moisture and weather The system is an effective barrier to water under hydrostatic pressure. See section 3 of this Certificate.
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Additional Information NHBC Standards 2025 In the opinion of the BBA, AQUAFIN-CJ6, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements in relation to NHBC Standards, Chapter 5.4 Waterproofing of basements and other below ground structures (requiring proprietary waterproofing materials to comply with Technical Requirement R3). Unless it can be demonstrated that the water table is permanently below the underside of the slab, the system must be used within a Type B(1) waterproofing protection system, in combination with either a Type A(1) or C(1) waterproofing protection where Grade 3(1) protection is required and the below ground wall retains more than 600 mm (measured from the top of the retained ground to the lowest finished floor level). The opinion of the BBA does not amount to any endorsement or approval by NHBC and does not in any way guarantee that NHBC will approve such product / system as compliant with the NHBC Technical Requirements and Standards. (1) As defined in BS 8102 : 2022.
Fulfilment of Requirements The BBA has judged AQUAFIN-CJ6 to be satisfactory for use as described in this Certificate. The system has been assessed as a flexible, hydrophilic waterstop for use at construction joints and penetrations in underground reinforced waterproof concrete structures.
ASSESSMENT System description and intended use The Certificate holder provided the following description for the system under assessment. AQUAFIN-CJ6 is a flexible hydrophilic waterstop. It is red in colour and measures 20 mm wide by 5 mm in thickness. Ancillary Items AQUAFIN-CA is an adhesive used to secure AQUAFIN-CJ6 to the concrete substrate which is essential to use with the system and has been assessed with the system. Applications The system is satisfactory for use as part of a Type B (structurally integral) protection (as defined in BS 8102 : 2022) to waterproof construction joints and penetrations in underground reinforced waterproof concrete structures. The system has not been assessed for use in movement joints.
System assessment – key factors The system was assessed for the following key factors, and the outcome of the assessments is shown below. Conclusions relating to the Building Regulations apply to the whole of the UK unless otherwise stated.
1 Mechanical resistance and stability Not applicable.
2 Safety in case of fire Not applicable. BBA 20/5741 PS3 Issue 2
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3 Hygiene, health and the environment Data were assessed for the following characteristics. 3.1 Weathertightness 3.1.1 Results of weathertightness tests are given in Table 1. Table 1 Weathertightness System assessed AQUAFIN CJ-6
Assessment method Unrestrained swelling and recovery BBA test method
Requirement No detrimental effect
Result Pass
AQUAFIN CJ-6
Restrained load developed when swollen BBA test method
Value achieved
1008 N achieved after 10 days
Resistance to hydrostatic pressure PG-FBB Part 1 Exposure to 4 bar of water pressure for 28 days
No water penetration
Pass
3.1.2 The unconfined system, in neutral pH water at +5°C and +23°C, will expand by up to 550% and 1000% by volume, respectively. 3.1.3 The expansion of the system in an alkaline solution of calcium hydroxide with a pH up to 12.0 and an acidic solution of sulphuric acid with a pH down to 5.0 will be less than that in neutral water, but will be adequate to enable the system to form an effective seal when fully confined. 3.1.4 The system will shrink on drying, but will re-hydrate on wetting without detriment to their ability to swell. 3.1.5 On the basis of data assessed, the system forms an effective barrier to water under pressure from the ground. 3.1.6 The ability of the system to expand and form an effective seal can be adversely affected by the groundwater chemistry, eg saline conditions, and the system has not been assessed for use under conditions other than those detailed in Table 1. The Certificate holder must be consulted for advice on specific applications, service conditions and groundwater chemistry, but such advice is outside the scope of this Certificate. 3.1.7 The system will develop significant pressure when confined within a concrete structure and must be covered by at least 80 mm of concrete from each edge to reduce the risk of damaging the concrete. 3.1.8 An appropriate safety factor must be applied to the maximum water pressure given in Table 1 and the use of additional waterproof protection must be considered, depending on the specific use and risks associated with any particular structure.
4 Safety and accessibility in use Not applicable.
5 Protection against noise Not applicable.
6 Energy economy and heat retention Not applicable.
7 Sustainable use of natural resources Not applicable. BBA 20/5741 PS3 Issue 2
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8 Durability The potential mechanisms for degradation and the known performance characteristics of the materials in the system were assessed. 8.2 Service life 8.2.1 Under normal service conditions, the system will have a life equivalent to the structure in which it is incorporated, provided it is designed, installed and maintained in accordance with this Certificate and the Certificate holder’s instructions. 8.2.2 The durability of the system may be affected if it is dislodged or damaged during or following installation; therefore, care must be taken to ensure that the system remains in position and is not dislodged when concrete is poured over it, or damaged during subsequent actions, eg vibration.
PROCESS ASSESSMENT Information provided by the Certificate holder was assessed for the following factors:
9 Design, installation, workmanship and maintenance 9.1 Design The system swells on contact with water and must be fully confined within the concrete structure to form an effective seal. 9.2 Installation 9.2.1 Installation instructions provided by the Certificate holder were assessed and judged to be appropriate and adequate. 9.2.2 Installation must be carried out in accordance with this Certificate and the Certificate holder’s instructions. A summary of instructions and guidance is provided in Annex A. 9.2.3 Installation must be carried out in accordance with the relevant requirements of BS 8102 : 2022. 9.2.4 To avoid premature swelling, the system must be protected from contact with water until enclosed in the structure and must not be placed during rain or when rain is forecast. 9.2.5 The system is intended for use on a sound and well-compacted concrete substrate. The substrate must be: clean and free from surface contamination dry at a temperature between +5 and +35°C free of dust, dirt and other debris (if present, must be removed using a stiff brush and/or suitable mechanical means) • smooth. Freshly placed concrete can be smoothed with a wooden batten to form a shallow rebate along which the system can be placed. • • • •
9.2.6 A minimum of 80 mm concrete coverage must be ensured around all edges. 9.2.7 Roll ends must be placed to have an overlap of ≥50 mm and pressed firmly together, or by butt jointing. Butt joints must be covered by a separate section of waterstop with a 30 mm overlap to both sections.
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9.3 Workmanship Practicability of installation was assessed by the BBA, on the basis of the Certificate holder’s information. To achieve the performance described in this Certificate, installation of the system must be carried out by contractors who have been trained by the Certificate holder. 9.4 Maintenance and repair As the system is confined within the structure and has suitable durability, maintenance is neither possible nor required.
10 Manufacture 10.1 The production processes for the system have been assessed, and provide assurance that the quality controls are satisfactory according to the following factors: 10.1.1 The manufacturer has provided documented information on the materials, processes, testing and control factors. 10.1.2 The quality control operated over batches of incoming materials has been assessed and deemed appropriate and adequate. 10.1.3 The quality control procedures and system testing to be undertaken have been assessed and deemed appropriate and adequate. 10.1.4 The process for management of non-conformities has been assessed and deemed appropriate and adequate. 10.1.5 An audit of each production location was undertaken, and it was confirmed that the production process was in accordance with the documented process, and that equipment has been properly tested and calibrated. † 10.2 The BBA has undertaken to review the above measures on a regular basis through a surveillance process, to verify that the specifications and quality control operated by the manufacturer are being maintained.
11 Delivery and site handling 11.1 The Certificate holder stated that the system is supplied in 40 m rolls, packaged as given in Table 2. Packaging bears the Certificate holder’s name and traceability information. Table 2 Product packaging No. of rolls per carton 1 5
Estimated carton weight 5 kg 25 kg
No. of cartons per pallet 50 20
Estimated total weight of pallet 270 kg 520 kg
11.2 Delivery and site handing must be performed in accordance with the Certificate holder’s instructions and this Certificate, including: 11.2.1 The system must be stored in a cool, dry environment, under cover, clear of the ground and protected from UV, moisture, frost and other sources of contamination at a temperature of between 5 and 35°C.
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†ANNEX A – SUPPLEMENTARY INFORMATION Supporting information in this Annex is relevant to the system but has not formed part of the material assessed for the Certificate.
Construction (Design and Management) Regulations 2015 Construction (Design and Management) Regulations (Northern Ireland) 2016 Information in this Certificate may assist the client, designer (including Principal Designer) and contractor (including Principal Contractor) to address their obligations under these Regulations.
CLP Regulations The Certificate holder has taken the responsibility of classifying and labelling the system under the GB CLP Regulation and CLP Regulation (EC) No 1272/2008 - classification, labelling and packaging of substances and mixtures. Users must refer to the relevant Safety Data Sheet(s).
Management Systems Certification for production The management system of the manufacturer has been assessed and registered as meeting the requirements of BS EN ISO 9001 : 2015 by TÜV Rheinland Cert GmbH International (Certificate 01 100 6383/05).
Additional information on installation Placing A.1 AQUAFIN-CJ6 is unrolled and placed onto the concrete surface to sit centrally between the inner and outer rows of the reinforcing bars. Fixing A.2 AQUAFIN-CA can be used on clean substrates, wire brushed to remove all contamination. A 10 mm bead of AQUAFIN-CA is gunned onto the substrate, and the system firmly pressed into the adhesive. Enclosure A.3 Prior to enclosing AQUAFIN-CJ6, the placed system must be inspected for damage and premature swelling. If damaged and/or swollen, the system must be replaced at this stage. A.4 Concrete is then poured to enclose the system, compacting well around the waterstop but taking particular care not to dislodge or damage the strip during the process.
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Bibliography BS 8102 : 2022 Protection of below ground structures against water ingress – Code of practice BS EN ISO 9001 : 2015 Quality management systems – Requirements PG-FBB Part 1 – Sealing for construction joints, transitions and connections: September 2017 Testing fundamentals for the issuing of General Building Inspection Test Certificates for joint sealing in concrete components with high water penetrate on resistance in the area below ground level
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Conditions of Certificate Conditions 1 This Certificate: • • • • • •
relates only to the product that is named and described on the front page is issued only to the company, firm, organisation or person named on the front page – no other company, firm, organisation or person may hold or claim that this Certificate has been issued to them has to be read, considered and used as a whole document – it may be misleading and will be incomplete to be selective is copyright of the BBA and any matter arising out of or in connection with it or its subject matter (including non-contractual disputes or claims) is governed by and construed in accordance with the law of England and Wales. the courts of England and Wales shall have exclusive jurisdiction to settle any matter arising out of or in connection with this Certificate or its subject matter (including non-contractual disputes or claims).
2 Publications, documents, specifications, legislation, regulations, standards and the like referenced in this Certificate are those that were current and/or deemed relevant by the BBA at the date of issue or reissue of this Certificate. 3 This Certificate will be displayed on the BBA website, and the Certificate Holder is entitled to use the Certificate and Certificate logo, provided that the product and its manufacture and/or fabrication, including all related and relevant parts and processes thereof: • are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA • continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine • are reviewed by the BBA as and when it considers appropriate. 4 The BBA has used due skill, care and diligence in preparing this Certificate, but no warranty is provided. 5 In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company, firm, organisation or person, for any matters arising directly or indirectly from: • the presence or absence of any patent, intellectual property or similar rights subsisting in the product or any other product • the right of the Certificate holder to manufacture, supply, install, maintain or market the product • actual installations of the product, including their nature, design, methods, performance, workmanship and maintenance • any works and constructions in which the product is installed, including their nature, design, methods, performance, workmanship and maintenance • any loss or damage, including personal injury, howsoever caused by the product, including its manufacture, supply, installation, use, maintenance and removal • any claims by the manufacturer relating to UKCA marking and CE marking. 6 Any information relating to the manufacture, supply, installation, use, maintenance and removal of this product which is contained or referred to in this Certificate is the minimum required to be met when the product is manufactured, supplied, installed, used, maintained and removed. It does not purport in any way to restate the requirements of the Health and Safety at Work etc. Act 1974, or of any other statutory, common law or other duty which may exist at the date of issue or reissue of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care.
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