Dow Fluorogel 4-8022

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Description for Dow Fluorogel 4-8022

Extremely soft, thermal/mechanical shock and vibration damping, excellent dielectric properties, solvent and fuel resistant, flexible cure schedule, reversion resistant, thick section cure, compatible with automated dispensing equipment, and physical and electrical stability over a wide temperature range.

Note: This material has been discontinued. Please view the Comparable Materials tab or call us at (262) 293-7970 for additional help.

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Application Type	Seal
1 Part or 2 Part	1 Part
Material Form	Gel
Industry	Circuits, Electronics, Optoelectronics
Manufacturer	Dow
Chemistry	Silicone, Solvent-free
Cure Method	Addition cure, Heat
Cure Temperature (°C)	20 to 25, 125, 150
Cure Time (min)	60, 30
Viscosity (cPs)	725
Color	Translucent
Chemical Resistance	Fuel
Relative Solvent Resistance	Chemical Resistance: Solvent
High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-45, -55
Light Refractive Index (RI)	High, 1.3900

Best Practices for Dow Fluorogel 4-8022

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Technical Data for Dow Fluorogel 4-8022

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Overview

Application Type
- Sealant - Seal
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
Material Form
- Gel
Industry
- Electronics - Circuits, Optoelectronics
- Industrial - Delicate components
Chemistry
- Solvent-Free
- Silicone
Application Method
- Dispenser - Automated dispensing equipment
Cure Method
- Heat
- 2-Part Cure - Addition cure
Color
- Translucent

Specifications

Cure Specs

Cure Temperature (°C)	20 to 25, 125, 150
Cure Time (min)	60, 30
Viscosity (cPs)	725
Work / Pot Time (min)	43,200	Test Method

Material Resistance

Chemical Resistance	Fuel
Relative Solvent Resistance	Chemical Resistance: Solvent
High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-45, -55
Moisture/Humidity Resistance	Moisture/humidity resistance

Conductivity

Dissipation Factor	0.55900, 0.00318	Test Method
Dielectric Strength (V/mil)	Excellent, 375
Dielectric Constant	7.09, 7.10	Test Method
Volume Resistivity (O)	1.2E+12 (ohms/cm)

Hardness

Shore A Hardness	50 g
Flexibility	Soft, Flexible, Resilient

Other Properties

Light Refractive Index (RI)	High, 1.3900
Specific Gravity	1.230	Test Method
Coefficient of Thermal Expansion (CTE)	540 (Linear (micron/m °C or ppm ))

Business Information

Shelf Life Details	Storage conditions and shelf life (“Use By” date) are indicated on the product label.
Shelf Life Temperature (°F)	41
Shelf Life (mon)	9

Best Practices for Dow Fluorogel 4-8022

*See Terms of Use Below
1. Mixing
  
  Some gels are supplied in bladder packs that avoid direct air contact with the liquid gel components, allowing use of air pressure over the pack in a pressure pot for dispensing. Do not apply air pressure directly to the liquid gel surface (without the bladder pack) as the gel can become supersaturated with air and bubbling can occur when the material is dispensed and cured. Use of bladder packs prevents bubbling, maintains cleanliness and avoids gel contamination. Gels can be dispensed manually or by using one of the available types of meter mix equipment. If possible, the potential for entrapment and incorporation of gas (typically air) should be considered during design of the part and selection of a process to dispense the gel. This is especially important with higher-viscosity and fastercuring gels. Degassing at >28 inches (10-20 mm) Hg vacuum may be necessary to ensure a void-free, protective layer.
2. Testing
  
  If a substrate or material is questionable with respect to potentially causing inhibition of cure, a small-scale compatibility test should be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure. In certain situations, toughened gels may appear fully cured but have reduced or no adhesion. This may result from slight inhibition at the interface.
Comparable Materials for Dow Fluorogel 4-8022

*See Terms of Use Below

Spec Engine^® Results
- Sylgard 535 Thixotropic Dielectric Gel(Dow)
  Extremely soft or firm, thermal/mechanical shock and vibration damping, excellent dielectric properties, flexible cure schedule, reversion resistant, thick section cure, compatible with automated dispensing equipment, and physical and electrical stability over a wide temperature range.
- Dowsil X3-1598 Adhesive(Dow)
  Noncorrosive; self-priming; rapid heat cure; high strength; flowable; contains UV indicator for automated inspection.
- SE 1880 Clear & Blue (Controlled Volatility)(Dow)
  Extremely soft to medium hardness, thermal/mechanical shock and vibration damping, excellent dielectric properties, flexible cure schedule, reversion resistant, thick section cure, compatible with automated dispensing equipment, and physical and electrical stability over a wider temperature range than the other types of gels.
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