Comparison

High-Temperature Sealant Silicone Rubber vs ABS

A side-by-side comparison of High-Temperature Sealant Grade Vinyl Methyl Silicone Rubber (VMQ) and Acrylonitrile Butadiene Styrene.

Property

High-Temperature Sealant Silicone Rubber

ABS

Physical

Density

1.14 - 1.20 g/cm³

1.04 – 1.07 g/cm³

Water Absorption (24h)

0.2 - 0.4 %

0.20 – 0.45 %

Transparency

Opaque

Shrinkage

1.5 - 2.5 %

0.4 – 0.9 %

Specific Gravity

—

1.05

Surface Finish

—

Matte to glossy

Mechanical

Young's Modulus

0.001 - 0.008 GPa

1.8 – 2.5 GPa

Tensile Strength

4 - 8 MPa

40 – 50 MPa

Elongation at Break

300 - 600 %

10 – 50 %

Impact Strength (Izod)

N/A

200 – 400 J/m

Flexural Strength

—

60 – 80 MPa

Hardness (Rockwell R)

—

100 – 115

Thermal

Glass Transition Temperature

-70 to -50 °C

105 °C

Melting Point

N/A

Amorphous (no true Tm)

Continuous Service Temperature

-50 to 250 °C

70 – 90 °C

Heat Deflection Temperature

N/A

85 – 100 °C

Thermal Conductivity

—

0.17 W/m·K

CTE

—

80 – 100 × 10⁻⁶ /K

Electrical

Dielectric Constant

2.9 - 3.1

2.7 – 3.2

Volume Resistivity

10^13 - 10^15 Ohm-cm

10¹⁶ Ω·cm

Dielectric Strength

18 - 28 kV/mm

15 – 20 kV/mm

Surface Resistivity

—

10¹⁵ Ω

Chemical resistance

Acids

Poor

—

Bases

Poor

Good

Solvents

Poor resistance to hydrocarbon solvents

—

UV Resistance

Excellent

Poor (unless stabilized)

Acids (dilute)

—

Good

Alcohols

—

Good

Oils & Greases

—

Fair

Gasoline

—

Poor

Acetone

—

Attacks / dissolves

Weathering

—

Poor without stabilizers

Sustainability

Recyclability

Very Limited

Recyclable (mechanical)

Recycling Code

N/A

7 (Other)

Carbon Footprint

High

~3.1 kg CO₂e / kg

Bio-based Content

—

0 %