Specifications
Varglas Silicone Rubber Sleeving conforms to, and is listed on the qualified Products List (QPL) for, MIL-l-3190/6, latest revision (Grade A); NEMA TF-1, Type 5; and ASTM-D372.

Under the Component Program of Underwriters Laboratories, Grade A Varglas Silicone Rubber is recognized for 200°C, 600 volt service and complies with VW-1 flammability requirements under UL File #E63450. (VW-1 compliance of Grades B through C-3 is covered under UL File #E53690.) The Canadian Standards Association certifies the use of Grade A for 200°C, 600 volt service under CSA File #LR-58486 “HFS”. Varglas Silicone Rubber is incorporated in systems work, per UL Safely Standard 1446, to facilitate product acceptance by UL.

Applications
Varglas Silicone Rubber Sleeving is used in appliances, motors and generators as well as in automotive, marine and aircraft electrical and electronic components such as transformers, coils, relays, etc. where a 200°C thermal rating is required. In addition to being well-suited as heavy duty insulation where subjected to high heat, such as in die-casting and plastic molding, Varglas Silicone Rubber Sleeving is also suitable for use in extremely low-temperature environments such as high altitude and aerospace applications.

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

Standard Color
Natural and white. Other colors made to order.

Standard Packaging
Coils, spools or 36” lengths at manufacturer’s option, unless otherwise specified. There is no cutting charge for 36” lengths, but lengths other than 36” are subject to cutting charges.

Sizes over 1” l.D. are generally supplied in 36” lengths.

FibergIas® is a registered trademark of Owens-Corning.

Typical Properties

Property	Procedure	Performance
Physical
Tensile Strength, Coating	ASTM-D412	1500 psi
Ultimate Elongation, Coating	ASTM-D412	800% @ 20°C
Hardness, Coating	ASTM-D2240	50 (Durometer)
Flexibility and Toughness, Coating	UL 1441	Passes (Penetration test)
Chemical
Oil and Solvent Resistance	MIL-l-3190/6	Passes (Excellent)
Water Vapor Resistance	MIL-l-3190/6	Passes (Good)
Resistance to Acids and Alkalies	—	Excellent
Resistance to the Elements	—	Unaffected by sunlight and weather.
Compatibility	UL 1446	Good. Compatible with most potting compounds and varnishes.
Electrical
Dielectric Strength after 48/23/50:
Grade A	NEMA TF - 1	8000v min. avg., 6000v min. indiv.
Grade B	NEMA TF - 1	4000v min. avg., 2500v min. indiv.
Grade C - 1	NEMA TF - 1	2500v min. avg., 1500v min. indiv.
Grade C - 2	NEMA TF - 1	1500v min. avg., 800v min. indiv.
Grade C - 3	NEMA TF - 1	No voltage guarantee.
Dielectric Strength after 96/23/96:
Grade A	NEMA TF - 1	80% of Original Value.
Hydrolytic Stability after 336 hrs. @ 70°C over Constant Water Reflux	MIL-I-3190/6	5000 volts min. avg.
Thermal
Thermal Endurance	MIL-l-3190/6 & UL 1441	Class 200°C (H)
Brittleness Temperature	ASTM-D350	- 73°C
Flame Resistance	UL 1441	Passes (VW-1)
	ASTM-D350, Method B	Passes
	NEMA TF-1	Passes
	MIL-l-3190/6, Method B	Passes
Pushback	MIL-l-3190/6	No cracks or ruptures. 6000 volts mm. avg. breakdown strength.

Note: Information contained here is precise and reliable. However, being unique, each end-use should be evaluated to satisfy its specific requirements.