Datasheet

DOW CORNING®4
Electrical insulating compound
FEATURES
Grease like material containing an inert silica filler in
combination with selected polydimethyl silicone fluids
APPLICATIONS
A moisture proof seal for aircraft, automotive and marine ignition systems and spark
plug connections, disconnection junctions in electrical wiring systems also in
electrical assemblies and terminals.
 Used as a seal and lubricant for cable connectors, battery terminals, rubber door seals,
switches and rubber and plastic O-rings and as a assembly lubricant for various metal-
on-plastic and metal-on-rubber combinations.
TYPICAL PROPERTIES
Specification Writers: These values are not intended for use in preparing specifications.
Please contact your local Dow Corning sales office or your Global Dow Corning
Connection before writing specifications on this product.
CTM* Parameter Unit Value
0176 Color White; translucent
0191 NLGI grade No. 2
Penetration unworked mm/10 220
Penetration worked 60, max mm/10 310
0033A Bleed, 30hours/200˚C(392˚F), max % 6.0
0033A Evaporation, 30hours/200˚C(392˚F), max % 2.0
Service temperature range¹ ˚C -55 to +200
˚F -67 to 392
Melting point ˚C(˚F) None
0022 Relative density at 25˚C(77˚F) g/ml 1.0
Electrical properties
0114 Dielectric strength, 1.27mm gap kV/mil 1.0
0112 Permittivity at 100Hz 3.1
0112 Permittivity at 100kHz 3.1
0112 Dissipation factor at 100Hz 0.0025
0112 Dissipation factor at 100kHZ 0.0025
0249 Volume resistivity at 23˚C(73˚F) Ohm.cm 0.10 x 10
15
0171 Arc resistance seconds 120
Parameter1. The maximum temperature limit may approach 260ºC(500ºF) with no oxygen
present.
* CTM: Corporate Test Method, copies of CTMs are available on request.
 High dielectric strength
 Low volatility
 Moisture resistant
 Good thermal oxidation and chemical
stability
 Meets MIL-S-8660C
 Retains its grease like consistency
from -55ºC(-67ºF) to +200ºC(392ºF)
 Odorless
 Highly water repellent
 Adheres readily to dry metals,
ceramics, rubber, plastics and
insulating resins
HOW TO USE
DOW CORNING 4 Compound can be
applied by hand, specially designed
automated equipment, brushing or
wiping. Certain designs of grease guns
may seize up with silicone compounds;
test prior to use.
A thinner consistency can be achieved
by dispersing in solvents such as
xylene, mineral spirits and methyl
ethyl ketone. DOW CORNING 4
Compound can then be applied by
brushing, dipping or spraying.
Product Information