RTV Silicone Potting Compound HN-8808A/B - Transparent, High
Insulation for Visual Inspection
Product Overview for Silicone Potting Compound:
The HN-8808A/B Transparent Potting Compound is specifically
designed for precision electronics that require ongoing monitoring
or failure analysis. Its exceptional clarity allows for clear
observation of internal components, circuitry, and potential issues
(such as cold solder joints or corrosion) after potting, while
providing top-tier insulation and environmental sealing. It is the
ideal choice for achieving high product reliability and
maintainability.
Key Performance Parameters for Silicone Potting Compound:
* Appearance (Mixed): Transparent elastomer
* Mix Ratio (A:B): 10 : 1 (by weight)
* Viscosity (A/B): Component A: 2200-2600 cP, Component B: 20-30 cP
(GB/2794-1995)
* Density: 0.94±0.02 g/cm³ (GB/2794-1995)
* Pot Life (25°C): 40-60 minutes
* Cure Time (25°C): 4-6 hours (tack-free), 24 hours (full cure)
* Hardness (Shore A): 10-20 (GB/T531-1999)
* Volume Resistivity: >4.0×10¹⁴ Ω·cm (GB/T 31838.2-2019)
* Thermal Conductivity: 0.3±0.1 W/M·K (GB/T 38712-2020)
* Dielectric Strength: ≥14 kV/mm
* Dielectric Constant: ≤3.0
* Elongation at Break: ≤100%
Product Highlights for Silicone Potting Compound:
* Internal Visual Inspection: Maintains high transparency after
curing for non-destructive internal inspection and failure
analysis.
* Excellent Electrical Insulation: Extremely high volume
resistivity and dielectric strength effectively prevent arc-over
under high voltage.
* Lightweight Design: Lower density than conventional potting
compounds helps reduce overall product weight.
* Stable Chemical Properties: Resistant to ozone, radiation, and
weathering; non-corrosive to most substrates.
* Broad Service Temperature Range: Remains elastic and performs
stably within a temperature range of -50°C to 200°C.
Application Areas for Silicone Potting Compound:
* Potting protection for precision sensors and current transformers
* Protection for high-end PCBs, facilitating rework and analysis
* Electronic modules with indicator lights, keeping signals visible
* Encapsulation for educational and research electronic models
* Aerospace electronics where weight is a concern
Detailed Operating Guide for Silicone Potting Compound:
1. Surface Preparation: Ensure surfaces to be potted are clean,
dry, and free of grease. Conduct compatibility tests for sensitive
substrates.
2. Accurate Weighing: Use a scale with 0.1g accuracy. Strictly
follow the 10:1 weight ratio of Component A to Component B. *Note:
The volume ratio is not 10:1 due to density differences. Always use
weight ratio.*
3. Thorough Mixing: Mix the two components thoroughly for at least
2-3 minutes in a clean container until the color is completely
uniform. Scrape the sides and bottom to ensure all material is
mixed.
4. Vacuum Degassing: Pour the mixed compound into a vacuum chamber
and degas at a vacuum of -0.095 MPa or higher for 2-5 minutes,
until most bubbles collapse. *This step is crucial for achieving
optically clear potting.*
5. Potting and Curing: Slowly pour the degassed compound into the
device housing, allowing it to flow and fill naturally. Cure at
25°C and <70% relative humidity. Subsequent testing or handling
can be done after 24 hours; final properties are achieved after 7
days.
Key Precautions for Silicone Potting Compound:
* Do Not Heat Cure: This is a condensation-cure system. Heating
will cause internal bubbling and cracking. Heating to accelerate
curing is strictly prohibited.
* Sealed Storage: Component B can absorb moisture from the air and
degrade. Fillers in Component A may settle. Reseal containers
immediately after use.
* Personal Protection: Wear gloves and safety glasses. Avoid
contact with skin and eyes. In case of contact, rinse immediately
with plenty of water and seek medical advice.
* Before Full Cure: Do not hermetically seal the device until the
compound is fully cured (recommended after 7 days) to allow
complete escape of by-product molecules.
Packaging & Storage for Silicone Potting Compound:
* Standard Packaging: 22kg/set (20kg A + 2kg B); 11kg/set (10kg A +
1kg B).
* Storage Conditions: Store in a cool, dry place away from direct
sunlight. Ideal storage temperature: 10-30°C.
* Shelf Life: 6 months in original, unopened containers from date
of manufacture.
FAQ for Silicone Potting Compound:
1. Q: Will the transparent potting compound turn yellow over time?
A: It exhibits excellent yellowing resistance when used
continuously at or below the maximum rated 200°C. Slight changes
may occur under extreme UV exposure outdoors, but protective
properties remain unaffected.
2. Q: How to ensure the best transparency after potting?
A: The key step is vacuum degassing. Also, ensure mixing containers
and tools are dry and clean to avoid contamination.
3. Q: What materials does it adhere well to?
A: It adheres well to most metals (aluminum, copper), plastics
(PCB, ABS), and ceramics. Test compatibility with non-polar
materials like PP, PE.
4. Q: Is a slightly tacky surface normal after curing?
A: Yes, a slight surface tack is normal for condensation-cure
silicones and does not affect internal curing or overall
protection.
5. Q: Can we get samples for testing?
A: Absolutely. We encourage testing before bulk orders. Please use
the "Contact Us" form on our website to request free samples. Our
technical team will assist you.
