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Home > Product > Potting Material >Silicone Material > Besil 921L
BECOAT 921L Low viscosity solventless silicone conformal coating
- One-part, low-viscosity, solvent-free, environmentally friendly
- High transparency, room temperature curing, good adhesion
- After curing, it is stable and elastic at -60 – 200°C
- good adhesion with most base material without primer
- Excellent waterproof, anti-corrosion, moisture, electrical insulation
BECOAT 921L is a low viscosity neutral conform coating silicone. solid content is 100%. Easy to spray, dip, brush or apply. Protective coating for hard and soft printed circuit boards and Protective coating of impregnated porous substrate.
| Item | Test standard | Unit | 921L | |
| Properties before curing | ||||
| Color | — | Clear | ||
| Viscosity | GB/T 10247-2008 | 25℃, Pa·s | 1000±300 | |
| Density | GB/T 15223-1994 | 1.00±0.02 | ||
| Tack free time | GB/T13477-2002 | 25℃, 55%RH,min | 5-7 | |
| Solid content | GB18583-2008 | 100 | ||
| Properties after curing | ||||
| Hardness | GB/T 531-2008 | 20 | ||
Suitable for coating with thick film circuit and printed circuit board; seal LCM LCD border; Other applications requiring good permeability.
Operation process
- Cleaning surface: cleansurface, remove rust, dust and oil.No need bottom coating to most material, such as glass, metal and most commonly industrial plastics.But on some polymers, it may be less cohesive.For example: polyethylene, polypropylene and PTFE, use PM1200 to do bottom coating.
- cut the nozzle to the required size, Fitted with glue gun, squeeze the glue into the cleaned surface and distribute evenly, When bonding, fixed two surface together. Under the conditions of room temperature and 55% relative humidity, adhesive’s surface dry in about 15 minutes, therefore, all processing must be completed before surface dry.
- Cured:Cured: place the coated parts in the air and used them after curing for 24 hours at room temperature.
- Precautions: after opening Becoat 921, use it as soon as possible, once again, when used again, squeeze out the solidified part, continue to use, do not affect normal use.
- please consult the market departmentif use dispensing equipment
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