Products

Solid Silicone Sheet

ElastaPro is North America’s leading supplier of solid silicone sheet, proudly Made in the USA and engineered for demanding industrial, aerospace, medical, and high‑temperature environments. Our silicone sheeting is available in a wide range of grades, durometers, thicknesses, colors, and widths, with options for pressure‑sensitive adhesive (PSA) backing and custom fabrication.

Whether you need thin‑gauge silicone, wide‑width rolls, precision‑cut sheets, or specialty grades such as medical silicone sheeting, ElastaPro delivers consistent quality, tight tolerances, and fast lead times.

Solid Silicone Sheet in Standard & Custom Sizes

ElastaPro manufactures solid silicone sheet in both continuous rolls and cut sheets, giving engineers and fabricators maximum flexibility.

Standard Widths

  • 36″ (914 mm)
  • 48″ (1219 mm)
  • Custom widths up to 62″ (1575 mm) — among the widest available in the industry

Linear Lengths

  • Continuous rolls up to 300+ yards depending on thickness

Thickness Range

  • 0.005″ to 0.500″ (0.13 mm to 12.7 mm)

Cut Sheet Sizes

  • 12″ × 12″
  • 24″ × 24″
  • 36″ × 36″
  • 48″ × 48″
  • Custom dimensions available

All materials arrive ready for die‑cutting, converting, or fabrication.

Why Choose Solid Silicone Sheet?

Solid silicone sheet is a high‑performance elastomer known for its thermal stability, environmental resistance, and long‑term durability. It outperforms many organic rubbers in extreme conditions.

Key Performance Advantages

  • Excellent resistance to UV, ozone, and weathering
  • Superior high‑temperature stability
  • Remains flexible at low temperatures
  • Chemically inert and non‑toxic
  • Tensile strength up to 1650 psi
  • Excellent electrical insulation properties
  • Strong metal adhesion during molding and extrusion
  • Maintains elasticity across wide temperature swings

These properties make silicone sheet ideal for sealing, gasketing, insulation, vibration damping, and protective barriers.

Available Grades of Solid Silicone Sheet

ElastaPro offers one of the industry’s most complete portfolios of silicone sheet materials, including:

Custom formulations and color matching are available upon request.

Soft Silicone Rubber Sheet (40–50 Shore A)

Soft silicone sheet is ideal for low‑compression sealing, cushioning, and thermal cycling environments. With durometers typically in the 40–50 Shore A range, these sheets provide:

  • High conformability
  • Vibration damping
  • Reliable sealing under low clamping force
  • Excellent flexibility from −60 °C to +200 °C
  • UV, ozone, and weather resistance

Soft silicone is widely used in medical devices, electronics, aerospace, and precision gaskets.

Solid Silicone Sheet vs. Foam Silicone Sheet

Solid silicone sheet and silicone foam sheet differ fundamentally in structure, which drives their mechanical, thermal, and sealing performance.

Solid silicone sheet is a fully dense elastomer with no internal voids. Its continuous polymer network provides high tensile strength, tear resistance, and predictable elastic recovery. Under compression, solid sheet exhibits higher compressive force deflection and maintains dimensional stability, making it suitable for flange gaskets, precision‑cut seals, and applications requiring defined compression limits or long‑term mechanical loading. Its low gas permeability and uniform cross‑section support reliable sealing against liquids, gases, and fine particulates.

Silicone foam sheet, by contrast, incorporates a controlled closed‑cell structure. The entrapped gas reduces density and stiffness, enabling lower compressive forces and improved conformability to irregular surfaces. Foam accommodates greater deflection at lower loads, which is advantageous for vibration damping, cushioning, and assemblies with variable tolerances or low‑clamp‑force hardware. However, its mechanical strength and tear resistance are lower than solid silicone, and it is not typically used for high‑pressure sealing.

In practice, solid silicone is selected when mechanical durability, precision sealing, or chemical resistance dominate requirements. Foam silicone is chosen when weight reduction, energy absorption, thermal insulation, or low‑force gasketing are the primary design constraints.

Comparison Matrix

Parameter Solid Silicone Sheet Silicone Foam Sheet
Material Structure Fully dense elastomer with no internal voids Closed‑cell structure with gas‑filled cells
Density High; uniform mass distribution Lower; reduced mass due to cellular structure
Mechanical Strength High tensile strength and tear resistance Lower tensile and tear strength
Compression Behavior Higher compressive force; limited deflection Lower compressive force; greater deflection at low loads

 
Compression Set Very low; maintains thickness under long‑term load Higher; more permanent deformation over cycles
Sealing Performance Excellent for liquid, gas, and particulate sealing Suitable for low‑pressure sealing; not ideal for high‑pressure fluids

 
Conformability Moderate; requires higher clamp force High; conforms easily to irregular surfaces
Thermal Performance Stable across wide temperature ranges Also thermally stable; provides better insulation due to trapped gas
Vibration / Energy Absorption Limited damping capability High damping and cushioning performance
Typical Applications Precision gaskets, chemical seals, high‑pressure enclosures Vibration pads, cushioning, low‑force gaskets, thermal insulation

Solid Silicone Sheet vs. Sponge Silicone Sheet

Solid silicone sheet and closed‑cell silicone sponge sheet differ primarily in density, cell morphology, and mechanical response.

Solid silicone sheet is a fully dense elastomer with no internal voids. Its continuous polymer matrix provides high tensile strength, tear resistance, and predictable elastic recovery. Under compression, solid sheet exhibits higher compressive force deflection and maintains dimensional stability, making it suitable for precision gaskets, high‑pressure sealing, and applications requiring defined compression limits. Its low gas permeability supports reliable sealing against liquids, gases, and fine particulates.

Silicone sponge sheet with closed cells incorporates a uniform network of sealed gas‑filled cells. This reduces density and stiffness, enabling lower compressive forces and improved conformability to irregular surfaces. Because the cells are sealed, sponge maintains low water absorption and provides environmental sealing, but its mechanical strength and tear resistance are lower than solid silicone. Compression behavior is more nonlinear as internal cell pressure increases under load, and compression set is typically higher.

In practice, solid silicone is selected when mechanical durability, chemical resistance, or high‑pressure sealing dominate requirements. Closed‑cell silicone sponge is chosen when weight reduction, cushioning, vibration damping, or low‑force gasketing are the primary design constraints, especially in enclosures with variable tolerances.

Comparison Matrix

Parameter Solid Silicone Sheet Silicone Sponge Sheet
Material Structure Fully dense elastomer; no internal voids Closed‑cell matrix with sealed gas‑filled cells
Density High; uniform mass distribution Lower; reduced mass due to cellular structure
Mechanical Strength High tensile strength and tear resistance Lower tensile and tear strength
Compression Behavior Higher compressive force; limited deflection Lower compressive force; nonlinear response as cells pressurize
Compression Set Very low; maintains thickness under long‑term load Higher; more permanent deformation over repeated cycles
Sealing Performance Excellent for high‑pressure liquid and gas sealing Effective for environmental sealing; not suited for high‑pressure fluids
Conformability Moderate; requires higher clamp force High; conforms easily to irregular surfaces with low clamp force
Water Absorption Minimal due to dense structure Very low; closed cells limit water uptake
Thermal Performance Stable across wide temperature ranges Also thermally stable; provides better insulation due to trapped gas
Vibration / Energy Absorption Limited damping capability High damping and cushioning performance
Typical Applications Precision gaskets, chemical seals, high‑pressure enclosures Low‑force gaskets, vibration pads, environmental seals, thermal insulation

Industries That Use Solid Silicone Sheet

Solid silicone sheet is used across industries that require durability, temperature resistance, and clean performance, including:

  • Aerospace & Defense
  • Medical & Healthcare
  • Food Processing
  • Electronics & Semiconductors
  • Transportation & Mass Transit
  • Energy & Power Systems
  • Industrial Equipment
  • Robotics & Automation

Its broad temperature range (−117 °C to +300 °C depending on grade) makes it suitable for extreme environments.

Silicone Sheets vs. Silicone Rolls

Feature Silicone Rolls Silicone Sheets
Form Continuous long rolls Pre‑cut or molded sheets
Best For Custom parts, long runs, large applications Specific dimensions, small parts, prototyping
Processing Calendered or rotocured Calendered or molded
Customization Cut to any length Custom sizes available

ElastaPro supplies both formats, including silicone rolls, depending on your application.

Thin Silicone Sheet

Thin silicone sheet is used when space constraints, precision, or lightweight design are critical. Benefits include:

  • High flexibility
  • Excellent dielectric strength
  • Chemical and UV stability
  • Low compression set
  • Compatibility with die‑cutting, laser cutting, and waterjet cutting

Applications include electronics, sensors, medical membranes, EMI/RFI shielding, and precision gaskets.

FAQs: Solid Silicone Sheet

What is solid silicone sheet used for?

Solid silicone sheet is used for sealing, gasketing, insulation, vibration damping, and protective barriers in environments that require thermal stability, environmental resistance, and long‑term durability.

What widths and thicknesses are available?

Standard widths include 36 in and 48 in, with custom widths up to 62 in. Thicknesses range from 0.005 in to 0.500 in, and continuous rolls can exceed 300 yards depending on thickness.

Does solid silicone sheet perform well in extreme temperatures?

Yes. Depending on grade, solid silicone sheet can operate from approximately −117 °C to +300 °C, maintaining elasticity and mechanical stability across wide temperature swings.

What grades of solid silicone sheet are available?

Available grades include commercial, general‑purpose, high‑strength, low‑outgassing, electrically conductive, fluorosilicone, metal‑detectable, fiberglass‑reinforced, flame‑retardant, food‑grade, medical‑grade, aerospace‑grade, and military‑grade materials.

Is solid silicone sheet suitable for outdoor or UV‑exposed environments?

Yes. Solid silicone has excellent resistance to UV, ozone, and weathering, making it suitable for long‑term outdoor use.

Can solid silicone sheet be die‑cut or fabricated?

All materials are supplied ready for die‑cutting, converting, laser cutting, and waterjet processing, supporting both prototyping and high‑volume production.

What industries use solid silicone sheet?

Common industries include aerospace, medical, food processing, electronics, transportation, energy, industrial equipment, and automation.

Ask ElastaPro for Solid Silicone Sheets

With decades of silicone manufacturing expertise, ElastaPro delivers high‑quality silicone sheet solutions backed by responsive service, technical support, and reliable lead times.

Contact us today for quotes, samples, or engineering guidance.