Silflex Sleeving

(-56°C to +200°C) (-69°F to +392°F)

Spec Sheet Download

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Silflex Sleeving is flexible, secondary insulation made from closely braided, continuous filament fiberglass which, after heat cleaning to remove impurities such as starch, oils and binders, is impregnated with a high-temperature silicone resin.

Specifications

Silflex Sleeving conforms to NEMA TF-2 and is made from glass fibers conforming to Military Specification MIL-Y-1140 (latest revision), Class C, Form 1 (continuous filament yarns). Under the Component Program of Underwriters Laboratories, Silflex sleeving complies with VW-1 flammability requirements under UL File #E53690.

Applications

Silflex Sleeving is used in areas where flexibility as well as resistance to radiation, moisture, high temperature, and flame are essential. It offers space factor electrical insulation of approximately 650 volts with minimum outgassing, particularly after a pre-bake, and readily accepts potting compounds thereby enhancing electrical properties in systems work.

Sizes

AWG #24 through 2” l.D. Other sizes subject to inquiry.

Standard Color

Natural. Other colors made to order.

Standard Packaging

Coils or spools at manufacturer’s option unless otherwise specified.

Varglas Silflex Properties

  Property   Performance
Physical
Specific Gravity, g/cu. cm. 2.55 – 2.58
Elongation at Break, percent 4.5 – 4.9
Tensile Strength, psi @ 22°C 500,000 – 550,000
Water Absorbency @ 22°C, 65% R.H. None
Chemical
Resistance to Acids and Alkalies Excellent in weak solutions. Fair in concentrated solutions.
Resistance to Solvents Fair
Resistance to the Elementst Good Sunlight and weathering properties.
Compatibility Improved compatibility with most potting compounds and varnishes.
Moisture Vapor Resistance Excellence
Electrical
Dielectric Strength Provides only space factor electrical insulation of approximately 650 volts.
Volume Resistivity @ 22°C and 500 volts dc, ohm-cm 1015 – 1016
Dielectric Constant @ 22°C, 60 Hz 6.5 – 6.8
Dissipation Factor @ 22°C, 1 MHz 0.001 – 0.005
Thermal
Thermal Endurance Up to 200°C indefinitely.
Brittleness Temperature – 56°C per ASTM D746
Flame Resistance Passes UL 1441 (VW-1). Will not burn.
Note:
Average properties of bulk S Glass, as reported in Owens-Corning Publication No. 5-TEX-18027. considered to be applicable to bare glass filaments.
Information contained here is precise and reliable. However, being unique, each end-use should be evaluated to satisfy its specific requirements.

Standard Sizes

Sleeving sizes in the following table are based on the size of round conductors that will fit snugly into the product without distortion of the sleeving.

Wire Size # Inside Diameter # Wall Thickness (minimum)*
(AWD) Maximum
Inches
Nominal
inches
Minimum
Inches
MM Size
(to .5mm)
MM – Dec.
Equivalent
Grade A
Inches
Grade B
Inches
Grade C
Inches
No. 24 0.027 0.022 0.020 .5 0.01969 0.011 0.007 0.006
No. 22 0.032 0.027 0.025 0.013 0.007 0.006
No. 20 0.039 0.034 0.032 0.013 0.007 0.006
No. 19 0.044 0.038 0.036 1.0 0.03937 0.013 0.007 0.006
No. 18 0.049 0.042 0.040 0.015 0.007 0.006
No. 17 0.055 0.047 0.045 0.015 0.007 0.006
No. 16 0.061 0.053 0.051 0.015 0.007 0.006
No. 15 0.066 0.059 0.057 1.5 0.05906 0.015 0.007 0.006
No. 14 0.072 0.066 0.064 0.015 0.007 0.006
No. 13 0.080 0.076 0.072 2.0 0.07874 0.015 0.007 0.006
No. 12 0.089 0.085 0.081 0.015 0.007 0.006
No. 11 0.101 0.095 0.091 2.5 0.09842 0.018 0.009 0.008
No. 10 0.112 0.106 0.102 0.018 0.009 0.008
No. 9 0.124 0.118 0.114 3.0 0.11811 0.018 0.009 0.008
No. 8 0.141 0.133 0.129 3.5 0.13780 0.018 0.009 0.008
No. 7 0.158 0.148 0.144 4.0 0.15748 0.018 0.009 0.008
No. 6 0.178 0.166 0.162 4.5 0.17716 0.020 0.011 0.010
No. 5 0.198 0.186 0.182 5.0 0.19685 0.020 0.011 0.010
No. 4 0.224 0.208 0.204 5.5 0.21654 0.020 0.011 0.010
No. 3 0.249 0.234 0.229 6.0 0.23622 0.020 0.011 0.010
No. 2 0.278 0.263 0.258 7.0 0.27559 0.020 0.011 0.010
No. 1 0.311 0.294 0.289 7.5 0.29528 0.020 0.011 0.010
5/16″ 0.334 0.313 0.313 8.0 0.31496 0.020 0.011 0.010
No. 0 0.347 0.330 0.325 8.5 0.33464 0.025 0.011 0.016
3/8″ 0.399 0.375 0.375 10.0 0.39370 0.025 0.017 0.016
7/16″ 0.462 0.438 0.438 11.5 0.45276 0.025 0.017 0.016
1/2″ 0.524 0.500 0.500 13.0 0.51181 0.025 0.017 0.016
5/8″ 0.655 0.625 0.625 16.5 0.64960 0.025 0.017 0.016
3/4″ 0.786 0.750 0.750 19.5 0.76772 0.025 0.017 0.016
7/8″ 0.911 0.875 0.875 22.5 0.88582 0.025 0.017 0.016
1″ 1.036 1.000 1.000 25.5 1.00470 0.025 0.017 0.016
Over 1″ Upon Request
*Minimum required wall thickness per NEMA standard TF-1
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