Sikaflex-668 PowerCure, Accelerated High-Performance Rail Glazing Adhesive, Exterior, Black, 600 mL
Sikaflex-668 PowerCure, Accelerated High-Performance Rail Glazing Adhesive, Exterior, Black, 600 mL
Sika
Sikaflex-668 PowerCure, Accelerated High-Performance Rail Glazing Adhesive, Exterior, Black, 600 mL
Sikaflex-668 PowerCure, Accelerated High-Performance Rail Glazing Adhesive, Exterior, Black, 600 mL
0,00 €
fără TVA
1,00 lei
| Accelerated high-performance assembly, glazing adhesive and sealant for rail applications Sikaflex-668 PowerCure is based on Purform, an industry-leading polyurethane with less than 0.1% monomeric diisocyanate for better health protection and occupational safety. Sikaflex-668 PowerCure is an accelerated adhesive system specifically designed for the rail industry. The curing of Sikaflex-668 PowerCure is accelerated by Sika’s PowerCure Technology which makes it largely independent of atmospheric conditions. It is suitable for assembly bonding and glazing applications. Its outstanding weathering durability and unique resistance to a wide variety of cleaning agents make it an ideal solution for use in exterior joints in the rail industry.
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PRODUCT BENEFITS
UsageSikaflex-668 PowerCure is designed for assembly and direct-glazing applications in rail, the commercial vehicle industry and for the repair market. It exhibits excellent tooling and application properties. With its superior resistance to a wide range of cleaning agents combined with outstanding weathering durability, it can be used for exterior joints. Curing of Sikaflex-668 PowerCure is accelerated by Sika’s PowerCure Technology which makes it largely independent of atmospheric conditions. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex-668 PowerCure on materials prone to stress cracking. This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.Packaging
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Typical Product Data
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Technical Information CURE MECHANISM Sikaflex-668 PowerCure cures by reaction with moisture provided by the accelerator paste and largely independent from atmospheric moisture. For typical strength build up data see table below. Time [h] Strength [MPa] 2 1 3 2.5 4 3 6 4 Table 1: Tensile lap-shear strength at 23 °C / 50 % r.h. CHEMICAL RESISTANCE Sikaflex-668 PowerCure is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents. It is resistant to a wide range of rail cleaning agents if used according to the guidelines of the manufacturer. Some rail cleaning agents contain aggressive chemicals such as phosphoric acids which may influence the durability of Sikaflex-668 PowerCure significantly. Therefore it is of highest importance to limit the exposure time to a minimum, observe correct dilution of cleaning agent and to perform a thorough rinsing after the cleaning process. Test newly introduced cleaning agents. | ||||||||||||||||||||||||||||||||||||||||||||||||
Application Information Surface Preparation Surfaces must be clean, dry and free from grease, oil, dust and contaminants. Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. All pre-treatment steps must be confirmed by preliminary tests on original substrates considering specific conditions in the assembly process. Application Setup the PowerCure Dispenser according to the PowerCure User Manual. If the application is discontinued for more than 10 minutes, the mixer needs to be replaced. Sikaflex-668 PowerCure can be processed between 10 °C and 35 °C but changes in reactivity as well as application properties need to be considered. The optimum temperature for substrate and sealant is between 15 °C and 25 °C. The open time is significantly shorter in hot and humid climate. The parts must always be joined within the open time. As a rule of thumb, a change of + 10 °C reduces the open time by half. To ensure a uniform thickness of the bondline it is recommend to apply the adhesive in form of a triangular bead (see figure 1).
Figure 1: Recommended bead configuration Tooling and finishing Tooling and finishing must be carried out within the open time of the adhesive. We recommend the use of Sika Tooling Agent N. Other finishing agents of lubricates must be tested for suitability and compatibility. Removal Uncured Sikaflex-668 PowerCure may be removed from tools and equipment with Sika Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using hand wipes such as Sika Cleaner-350H or a suitable industrial hand cleaner and water. |
The above design is only a sample of the options available, for reference purposes only. Our policy of continuous improvement may result in a change of specifications without notice. If any discrepencies might be between the data sheet values and standards, we reserve the rights to make technical changes. Our company will not be held responsible, as all or any of pictures, drawings, weights and dimensions details or other elements in this document are only indicative and must not be considered contractual. Contact our sales team for other specifications or custom made products.
Contact our sales team for other specifications or custom made products.