Description
Silcoflex 430 universal acetic silicone - NPT
Single-component acetic cross-linking silicone.
Silcoflex 430 is a single-component, acetic-cross-linking silicone sealant for general sealing.
It cures at room temperature under the action of atmospheric moisture to create a permanently flexible silicone elastomer with high chemical and aging resistance.
Fields of application
Surfaces must be perfectly clean, dry and free of dust and grease.
Bonding materials should be treated according to NPT application guidelines.
Preliminary adhesion tests on the substrate are recommended.
Remove the threaded top from the plastic nozzle, screw on the nozzle and cut it at an angle to the desired bead thickness and profile.
Insert the cartridge into a manual or pneumatic gun (preferably one with a telescoping plunger) and extrude the sealant carefully, avoiding air entrapment.
Once opened, the packages should be used within a relatively short time.
The optimum operating temperature for both substrate and sealant is between 15°C and 25°C.
Smoothing and finishing should be done within the open time (skin formation time) of the sealant.
Since the system is hygro-hardening, allow sufficient exposure to air.
Bonded elements may require additional sealing or support during the curing period.
Acetic silicone for sealing and repairing compact, nonporous materials usually used in assemblies and construction, ideal for DIY.
Adheres well to glass, wood, ceramics, aluminum, anodized aluminum, polyamide.
It does not adhere to PP, PE, PTFE.
Not suitable on metal surfaces where it can cause corrosion, nor on natural stones such as marble, granite, quartzite.
Not suitable for aquariums.
For indoor and outdoor use.
Silcoflex 430 should not be used for insulating glass assembly, on porous substrates such as marble, concrete, cement and mortar because the product releases acetic acid during curing and, in contact with metals such as lead, copper, brass or zinc, causes corrosion.
It should not be used on polyacrylate elements as it may cause environmental stress cracking.
Not recommended for applications in insulating or structural glazing, as a mirror adhesive, for sealing aquariums or for long-term use underwater.
Not suitable for food contact applications.
Features
- Ideal for applications on glass, ceramics and aluminum.
- Excellent for general applications
- Resists weathering well
Technical characteristics
| Appearance | Thixotropic paste without casting |
Chemical nature |
Acetically cross-linked silicone |
| Polymerization | Hygrohardening |
| Thickness curing [mm] (NPT Method 07) (24h - 23°C and 50% RH) | ca. 2.0 |
| Shore A Hardness (ISO 868) | ca. 10 |
| Specific gravity [g/cm³] (NPT Method 06) (23°C and 50% RH) | ca. 0.94 |
| Open time [min] (NPT Method 17) (23°C and 50% RH) | ca. 15 |
| Elastic modulus at 100% [N/mm2] (ISO 8339) | ca. 0.2 |
| Tensile strength [N/mm2] (ISO 8339) | ca. 0.4 |
| Elongation at break [%] (ISO 8339) | ca. 300 |
| Application temperature [°C] | +5 to +40 |
| Thermal resistance [°C] | -10 to +100 |
Equipment cleaning and personal protection
Clean the tools used with acetone or solvent.
When the adhesive has not yet cured, it can be removed from the squeegee using paper or a cloth.
Once cured, the product can only be removed mechanically.
Avoid skin contact by using latex, rubber or polyethylene gloves.
If it comes in contact with skin, remove immediately and wash with soap and water.
Product storage
Silcoflex 430 can be stored for 12 months in the original packaging.
Storage temperature between 10°C and 25°C in a cool, dry room.
Keep away from sources of moisture, heat sources and direct sunlight contact.