Weicon Aqua-Flex MS Polimer 310 ml (Grey)

Weicon Aqua-Flex MS Polymer 310 ml (Grey) is a single-component, elastic industrial adhesive and sealing compound designed for bonding and sealing even on damp and wet surfaces. Thanks to its MS polymer-based formulation, it offers an alternative in applications where silicone-based products are not suitable and retains permanent elasticity after curing. The cartridge format enables quick on-site application and controlled joint filling. The grey colour option is often preferred in installations on metal and building components where visual consistency is desired.

Definition and Chemical Structure of Aqua-Flex MS Polymer

Aqua-Flex is a 1-component MS polymer (polyoxypropylene-based) bonding and sealing material that cures with moisture. Its formula is free of silicone, isocyanates, halogens and solvents, which is advantageous in jobs where practical requirements such as low odour, surface compatibility and paintability are important. The product can be painted “wet on wet” and is designed to fit post-application coating processes. The manufacturer is WEICON GmbH & Co. KG (Münster, Germany), and the product is of German origin.

Performance, Resistance and Technical Values

This industrial adhesive supports fast progress in assembly operations with a skin formation time of around 25 minutes and reaches an approximate curing rate of 2–3 mm within the first 24 hours. The application/processing temperature range is +5 °C to +40 °C, and the recommended curing conditions are +5 °C to +40 °C with 30–95% relative humidity. Mechanically, tensile strength is given as 3.3 N/mm², elongation at break as approximately 650%, and average lap shear strength as 2.1 N/mm²; Shore A hardness is specified as 42±5. In joint applications, the maximum gap-bridging capability is 5 mm, the maximum joint width is 25 mm, and the slump/sag value is stated as 1.0 mm. Temperature resistance is indicated as -40 °C to +90 °C for short periods, and up to +130 °C for approximately 2 hours; the product is classified as a B2 building material according to DIN 4102.

Sector-Based Applications and Compatible Substrates

Aqua-Flex MS Polymer aims to cover both bonding and sealing needs in industrial assembly tasks such as piping and cable penetrations, tank and equipment manufacturing, and ventilation and air-conditioning systems. In garden and landscaping applications (e.g., stone, concrete, and joints between different building elements), it can be chosen to create elastic joints exposed to water and outdoor conditions. In plumbing installations and wet-room details, it is suitable for forming an elastic sealing line at interfaces between different materials. Because it can achieve adhesion on many substrates such as metal, plastic, ceramic, wood, glass and stone with appropriate surface preparation, it is positioned as a versatile industrial adhesive for maintenance and repair teams. Resistance to UV, weathering, and fresh and salt water supports stable performance in outdoor applications.

Standards, Certifications and Use Notes

ISEGA compliance is an important indicator for suitability as an adhesive in food-technology-related applications and can simplify product selection in plants with regulated processes. In addition, being referenced with IMPA codes (815279/80/81) in the maritime/logistics field can be an advantage where procurement standardisation is required. The statement of compatibility with MIL-A-101A provides a framework that may be considered in projects where products are assessed against specific technical specifications. For such areas of use, carrying out small-area on-site tests before application is a good quality-assurance practice for verifying substrate compatibility and process performance.

Application Method, Surface Preparation and Practical Advantages

Before application, ensuring surfaces are clean and free of oil and dirt—even if they are dry or damp—directly affects adhesion performance; where necessary, mechanical roughening such as sanding or grinding can improve bonding. The 310 ml cartridge can be applied with standard cartridge guns; pneumatic guns or automated dosing systems may be preferred on lines where process continuity is required. It is recommended to join parts before skin formation to ensure full wetting of the surfaces, which helps stabilise both sealing performance and bond strength. When applied correctly, permanent elasticity, resistance to outdoor influences, broad substrate compatibility and paintability combine to deliver a reliable industrial adhesive performance in maintenance and repair processes. The minimum shelf life is stated as 12 months at room temperature, and storage is recommended in closed packaging away from heat sources and direct sunlight.