Dow SE 1885 M Kit

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Description for Dow SE 1885 M Kit

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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Application Type	Seal
1 Part or 2 Part	2-Part
Material Form	Gel
Industry	Circuits, Electronics, Optoelectronics
Manufacturer	Dow
Chemistry	Silicone, Solvent-free
Cure Method	Part A/Part B
Cure Temperature (°C)	20 to 25, 150
Cure Time (min)	30
Viscosity (cPs)	Low, 800
Color	Clear
High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-80
Volume Resistivity (O)	9.3E+14 (ohms/cm)
Light Refractive Index (RI)	High

Best Practices for Dow SE 1885 M Kit

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Technical Data for Dow SE 1885 M Kit

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Overview

Application Type
- Sealant - Seal
1 Part or 2 Part
- 2-Part
Material Form
- Gel
Industry
- Electronics - Circuits, Optoelectronics
- Industrial - Delicate components
Chemistry
- Solvent-Free
- Silicone
Application Method
- Dispenser - Automated dispensing equipment
Cure Method
- 2-Part Cure - Part A/Part B
Color
- Clear / Transparent - Clear

Specifications

Cure Specs

Cure Temperature (°C)	20 to 25, 150
Cure Time (min)	30
Viscosity (cPs)	Low, 800
Work / Pot Time (min)	Good
Mix Ratio	1:1 (by volume)

Material Resistance

High Temperature Resistance (°C)	200
Low Temperature Resistance (°C)	-80
Moisture/Humidity Resistance	Moisture/humidity resistance

Conductivity

Dissipation Factor	0.00020	Test Method
Dielectric Strength (V/mil)	508, Excellent
Dielectric Constant	2.75	Test Method
Volume Resistivity (O)	9.3E+14 (ohms/cm)

Hardness

Shore A Hardness	Soft to medium, 65 g
Flexibility	Flexible, Resilient

Other Properties

Light Refractive Index (RI)	High
Specific Gravity	0.970	Test Method

Business Information

Shelf Life Details	Shelf life from date of manufacture for material in the original, unopened container, stored at less than 35°C, unless otherwise noted.;Storage conditions and shelf life (“Use By” date) are indicated on the product label.
Shelf Life Type	from date of manufacture
Shelf Life (mon)	15

Best Practices for Dow SE 1885 M Kit

*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. In general, gels are supplied as two-part products that are mixed in a 1:1 ratio (Parts A and B)
  
  one-part gels are available that eliminate the need for mixing. Gels can be dispensed manually or by using one of the available types of meter mix equipment. Typically, the two components are of matched viscosities and are readily mixed with static or dynamic mixers, with automated meter-mix normally used for high volume processes. For low-volume applications, manual weighing and simple hand mixing may be appropriate. Inaccurate proportioning or inadequate mixing may cause localized or widespread problems affecting the gel properties or cure characteristics. 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 mix and dispense the gel. This is especially important with higher-viscosity and faster-curing 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 SE 1885 M Kit

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Spec Engine^® Results
- Q3-6575 Dielectric Gel A/B Kit(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.
- SE 1885 Kit(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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