WEICON RK-7300 Structural Acrylic Adhesive 60 g

Weicon RK-7300 Structural Acrylic Adhesive 60 g is a two-component, MMA (methyl methacrylate)-based industrial adhesive system designed for high strength in assemblies exposed to static and dynamic loads. It stands out with a high-adhesion approach, especially on low surface energy plastics (PE, PP) and difficult substrates such as EPDM. Thanks to its high viscosity, it limits run-off on vertical surfaces and creates a cleaner application line. The manufacturer is WEICON, and the company’s headquarters are stated to be in Germany.

What is the RK-7300 structural acrylic industrial adhesive used for?
This industrial adhesive is designed to form a structural bond line in combinations of metal, plastic, and elastomers. In addition to low surface energy plastics, it aims to provide ease of application in joints where materials with different coefficients of expansion are used together (e.g., plastic–aluminium or plastic–steel). The approach of using glass bead fillers to create a fixed bond gap helps make the joint thickness more controllable. As a result, assembly repeatability increases and quality variation can be reduced, especially in serial production processes.

Chemical basis and curing behavior
The system is described as an MMA-based, solvent-free structural industrial adhesive and works with a paste-like consistency. In cartridge-type systems applied at a 1:1 mixing ratio, homogeneous mixing and dosing control become more practical. Since there is a short working time under 20 °C conditions, it is important that part preparation and fixture planning are completed before application. Load application and process flow should be planned according to the time required to reach full strength.

Strength, gap management, and temperature effect
Because the maximum gap-bridging capacity for this industrial adhesive is specified as 1 mm, it should not be considered a filler material for large openings. The service temperature range is stated as -55 °C to +100 °C, providing a sufficient framework for many industrial assemblies operating under variable climate conditions. Since tensile-shear strength values on different substrates vary by material, the key factors determining final performance are correct surface preparation and suitable joint geometry. The high-adhesion focus for difficult substrates strengthens the rationale for choosing the product, especially in plastic- and elastomer-heavy assemblies.

Application method, compatible substrates, and sector-specific use areas
Application is carried out using a static mixer on a dual cartridge, and discarding the first short bead is recommended to ensure mixing stability. Keeping surfaces clean, dry, and free of oil is considered critical; on smooth surfaces, mechanical roughening can make bonding more reliable. This product is used in automotive and supplier industries for plastic part-to-bracket assemblies, fixing EPDM components, and bonding composite parts; in machine manufacturing for housings, covers, and structural elements; and in electrical/electronic applications for joining plastic housings and carrier parts. It also offers an industrial adhesive alternative for model/mold work, composites, and maintenance/repair tasks where a fast process and high adhesion are needed within a single system.

Key advantages and standards information
The product’s strengths can be summarized as a high adhesion target on low surface energy plastics such as PE/PP, a focus on use on difficult substrates like EPDM, and controlled application capability thanks to high viscosity. Creating a more consistent bond gap through the glass bead filler approach supports process reliability in serial assembly. Suitability for static and dynamic loads can be a reason for preference in joints exposed to vibration and impact effects. In addition, the presence of an ISSA code used in certain procurement and specification processes can provide practicality in corporate purchasing workflows.