USG425 is a two-part water clear potting gel. It is a flowable, addition-curing, silicone that cures fast at elevated temperature to a very firm optically clear rubbery gel for casting or injection molding of high performance optical components. It also cures in room temperature. It has non-corrosive and self-priming adhesion to various substrates. It stays thermo-optically stable with heat and UV exposure and will not yellowing over time. USG425 can be automated to dispense from pails with auto mixing & dispensing pump or hand extruded from 50cc or 200cc ducal cartridge using dispensing gun with a mixing tube and a plunger.
Special Features and Benefits
Optically clear firm gel
Non-yellowing and thermo-optically stable
Two component and ready to apply
Rom temperature curable
Fast cure at elevated temperature
Very soft for stress compliance
Excellent dielectric properties
Mechanical shock and vibration damping
Low outgassing and minimal volatile
Broad range of temperature stability
Pot / encapsulate optical parts
Coat various opt-electronic components
LED, solar or other optical applications
Seal lids, covers, housings, connectors
Thermal stress coupling
Click here to view the Technical Datasheet (TDS) of this product in details (PDF File) »
Important! USG425 is platinum cure system. Please keep applied surface / housing clean and avoid using this material on any place that contains sulfur, amine, phosphorous, organo-metals, acid, etc. because these contaminants could inhibit the cure the material. Please let the compound thoroughly thaw after taking it out from freezer. This typically needs half to one hour depending on the size of container.
We recommend running preliminary tests to optimize conditions for the particular application. Comprehensive processing instructions can be obtained by contacting directly to USGlue.com.
USG425 has a shelf life of at least 6 months when stored at < 5°C freezer in the originally sealed container. Storage beyond the date specified does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.
USG425 silicone contains neither toxic nor corrosive substances that might require special handling precautions. General hygiene regulations should be observed. Comprehensive instructions are given in the corresponding Material Safety Data Sheets. They are available on request from USGlue.com.
The data presented in this leaflet are in accordance with the present state of our knowledge, but do not absolve the user from carefully checking all supplies immediately on receipt. We reserve the right to alter product constants within the scope of technical progress or new developments. The recommendations made in this leaflet should be checked by preliminary trials because of conditions during processing over which we have no control, especially where other companies raw materials are also being used. The recommendations do not absolve the user from the obligation of investigating the possibility of infringement of third parties rights and, if necessary, clarifying the position. Recommendations for use do not constitute a warranty, either express or implied, of the fitness or suitability of the products for a particular purpose. For technical, quality, or product safety questions, please contact directly to USGlue.com.