I. Product Overview
The Dendritic Macromolecule Elastic Metal Repair Adhesive is an elastic adhesive containing dendritic macromolecular components. This adhesive exhibits exceptional elasticity and bonding strength, making it suitable for filling gaps and bonding metal components, as well as for filling and repairing cracks and crevices in metallic materials—such as iron and stainless steel. Specific applications include, for instance, the insulating filling or repair of rail joints between railway tracks.
II. Product Data
1. Curing Time Reference (10g):
Note: Curing time is determined by the volume of adhesive injected and the ambient temperature at the construction site; it may be subject to moderate extension or reduction. Application at temperatures below 0°C is not recommended. The provided data is for reference purposes only and may be adjusted based on specific circumstances to ensure that the installation is completed within the applicable working time.
2. Key Performance Characteristics:
III. Product Features
1. Cures at temperatures ranging from low to ambient; suitable for a wide temperature range.
2. Electrically insulating; safe and reliable.
3. Exhibits strong adhesion to metal surfaces; highly resistant to peeling.
4. Possesses excellent flexibility and toughness.
5. Non-toxic and odorless; safe and environmentally friendly.
IV. Usage Instructions
This product is supplied in an injection-style cartridge and requires a specialized dispensing gun for extrusion. Please wear gloves and other protective gear during operation. (Our company supplies the specialized dispensing guns, which may be purchased separately as needed.)
V. Application Steps
1. Grind the cross-sections of the rail ends until a metallic luster is visible, and grind the insulating plates to create a roughened surface. Thoroughly blow out the rail gap to ensure it is dry and free of water, loose dust, or soil.
2. Seal the bottom and edges of the rail gap using clear adhesive tape to prevent the adhesive from leaking out.
3. Load the adhesive cartridge into the dispensing gun, then attach the mixing nozzle to the cartridge's outlet.
4. Extrude and discard the first four trigger pulls of adhesive to ensure proper mixing.
5. Apply the adhesive into the rail gap and onto the insulating plates, filling the gap until the adhesive level sits approximately 0.5 mm above the rail surface.
6. Once the adhesive has reached its initial set (gelation) stage, remove the tape. If the open time (working window) is particularly short, an additional layer of tape may be applied over the adhesive surface; this tape should be removed only after the adhesive has fully cured.
7. Once the adhesive has fully cured, the application process is complete.
VI. Precautions
1. Application temperature range: -5°C to 30°C. Curing proceeds too slowly at temperatures that are too low, while high temperatures shorten the working time, requiring faster application.
2. Do not apply during rainy or foggy weather. Ensure that the application surface is completely dry at the time of application.
3. Do not expose the adhesive to water before it has fully cured.
4. During winter, steel rails undergo significant thermal contraction; if cracks appear in the cured adhesive, please apply touch-up repairs as necessary.
5. The adhesive cures relatively quickly; if the adhesive within the mixing nozzle cures and obstructs extrusion, please replace the mixing nozzle with a new one.
