Heat Seal Silicone Sheets

United Silicone Heat Seal Silicone Sheets Now Available through ISM


Industrial Specialties Mfg. (ISM) is the master distributor for heat seal silicone sheets from United Silicone. Our distribution relationship with United Silicone allows us to provide our customers with these exceptional products just as they are needed.

Our United Silicone metal bonded materials are heat tolerant to 550°F, outperforming many industrial compliant materials currently available. They are engineered to withstand the temperature, pressure and dwell time requirements of heat sealing and packaging tooling applications.Industrial Specialties Mfg. (ISM) is the master distributor for heat seal silicone sheets from United Silicone. Our distribution relationship with United Silicone allows us to provide our customers with these exceptional products just as they are needed.

United Silicone heat seal silicone rubber is compression molded (vertically manufactured). This manufacturing method limits the maximum sheet size to 24”x36”. This manufacturing method is proven to provide increased longevity in comparison to extruded silicone rubbers.

Figure 1
What makes United Silicone rubber bonded heat seal tooling better? >>

Watch this short video to find out how United Silicone meets the challenges of silicone-to-metal bonding for high temperature applications like heat seal tooling.​

ApplicationsMetal bonded heat seal silicone sheets are useful for applications that benefit from a flexible yet durable non-marring, non-skid material that is thermally conductive and highly heat tolerant. Industries that use them include

  • Rigid Packaging
  • Flexible Packaging
  • Food Packaging
  • Medical Packaging


Industrial usesCommon heat seal industrial uses include

  • Bag Sealing
  • Tray Sealing
  • ​Pouch Sealing
  • Rigid Packaging


Common formats

  • Seal Bars
  • Seal Heads

 

Benefits

  • Thermally Conductive
  • Heat Tolerant to 550°F
  • Rubber Formulation Options
  • 40 to 90 Durometer (Shore A)
  • Excellent Silicone-to-Metal Bond
  • Resistant to Compression Stress
  • Metal Bonded Sheets are Precision Ground for Flatness
  • FDA Food Grade and 3-A Sanitary Certified Material Options


Figure 2
Silicone rubber-to-metal bonded sheets for high temperature heat seal applications >>

 

Standard Tolerances

  • Metal Bonded Silicone Sheet Thickness: ± 0.010”
  • Metal Bonded and Unbonded Length and Width: ± 0.062”
  • Metal Bonded and Unbonded Rubber Durometer: ± 5 points

Contact us for more information, samples or pricing >>

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United Silicone Heat Seal Silicone Sheet Formulations

United Silicone Ultrasil (red) metal bonded silicone rubber sheet stock.
Ultrasil silicone sheets

Ultrasil (red) Heat Seal Silicone SheetsUltrasil heat seal silicone sheets are engineered for demanding vertical and peripheral operations requiring high temperatures or high temperatures and high pressures -- typically, manually fed.

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*Visit our interactive catalog to get Ultrasil silicone sheet part numbers, price quotes or more information.
 

Ultrasil (red) heat seal silicone sheet specifications

  • 1/32” to 1/2" rubber thickness
  • 12” x 24” or 24” x 36” standard sheet sizes
  • 40, 50, 60, 70, 80 or 90 Shore A durometer
  • Metal bonded sheets are precision ground for flatness


Ultrasil heat seal silicone sheet backing options

  • Unbonded
  • Aluminum (1/32” to 1/2")
  • Dead Soft Aluminum (1/16")
  • Stainless Steel (1/16” and 1/8”)
  • Cold Rolled Steel (1/16” and 1/8”)


Thermosil (brown) Heat Seal Silicone SheetsThermosil heat seal silicone sheets are engineered for semi-automatic and fully automated sealing applications requiring very stable high temperatures and rapid heat recovery.

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*Visit our interactive catalog to get Thermosil silicone sheet part numbers, price quotes or more information.

 

United Silicone Thermosil (brown) metal bonded silicone rubber sheet stock.
Thermosil silicone sheets

Thermosil (brown) heat seal silicone sheet specifications

  • 1/32” to 1/2" rubber thickness
  • 12” x 24” or 24” x 36” standard sheet sizes
  • 60, 70, 80 or 90 Shore A durometer
  • Metal bonded sheets are precision ground for flatness


Thermosil heat seal silicone sheet backing options

  • Unbonded
  • Aluminum (1/32” to 1")
  • Dead Soft Aluminum (1/16")
  • Stainless Steel (1/16” and 1/8”)
  • Cold Rolled Steel (1/16” and 1/8”)
United Silicone FDA (red) metal bonded silicone rubber sheet stock.
FDA silicone sheets


FDA (red) Heat Seal Silicone SheetsFDA heat seal silicone sheets are FDA (CFR Title 21 Part 177.2600) Food Grade Compliant.

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*Visit our interactive catalog to get FDA-3A silicone sheet part numbers, price quotes or more information.


FDA heat seal silicone sheet specifications

  • 80 Shore A durometer
  • 1/32” to 1/2" rubber thickness
  • 12” x 24” or 24” x 36” standard sheet sizes
  • Metal bonded sheets are precision ground for flatness


FDA heat seal silicone sheet backing options

  • Unbonded
  • Aluminum (1/32” to 1/2")
  • Dead Soft Aluminum (1/16")
  • Stainless Steel (1/16” and 1/8”)
  • Cold Rolled Steel (1/16” and 1/8”)

 

United Silicone FDA-3A metal bonded heat seal silicone sheet stock.
FDA-3A silicone sheets

FDA-3A (red) Heat Seal Silicone SheetsFDA-3A heat seal silicone sheets are FDA (CFR Title 21 Part 177.2600) Food Grade Compliant and 3-A Sanitary Class 1 Test Specifications Certified.

 

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*Visit our interactive catalog to get FDA-3A silicone sheet part numbers, price quotes or more information.


FDA-3A heat seal silicone sheet specifications

  • 60 Shore A durometer
  • 1/32” to 1/2" rubber thickness
  • 12” x 24” or 24” x 36” standard sheet sizes
  • Metal bonded sheets are precision ground for flatness


FDA-3A heat seal silicone sheet backing options

  • Unbonded
  • Aluminum (1/32” to 1/2")
  • Dead Soft Aluminum (1/16")
  • Stainless Steel (1/16” and 1/8”)
  • Cold Rolled Steel (1/16” and 1/8”)


Other Heat Seal Silicone Sheet Formats

United Silicone Ultrasil (red) dead soft aluminum bonded silicone rubber sheet stock.
Dead Soft Aluminum silicone sheets

Dead Soft Aluminum Bonded Heat Seal Silicone SheetsDead soft aluminum bonded heat seal silicone sheets are molded, precision ground for flatness and shipped flat. They can be bent or shaped on site to match the contour needed for your specific sealing application.

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*Visit our interactive catalog to get Dead Soft Aluminum silicone sheet part numbers, price quotes or more information.


Dead soft aluminum bonded heat seal silicone sheet specifications

  • Precision ground for flatness
  • Standard metal thickness is 1/16”
  • 12” x 24” or 24” x 36” standard sheet sizes


Dead soft aluminum bonded heat seal silicone sheet options

  • 1/32” to 1/2" rubber thickness
  • FDA: 80 Shore A durometer
  • FDA-3A: 60 Shore A durometer
  • Thermosil: 60, 70, 80 or 90 Shore A durometer
  • Ultrasil: 40, 50, 60, 70, 80 or 90 Shore A durometer
United Silicone Ultrasil (red) unbonded silicone rubber sheet stock.
Unbonded silicone sheets


Unbonded Heat Seal Silicone SheetsUnbonded heat seal silicone sheets are durable, high temperature tolerant, flexible and conformable. They have excellent excellent physical properties including high abrasion resistance, good tensile strength, low compression tolerance and high tear properties.

All United Silicone heat seal silicone sheets are engineered and compression molded to provide a silicone rubber that is up to  seven times (7x) more durable than extruded silicone rubber.

These unbonded heat seal silicone sheets are not surface ground for flatness and have a thickness tolerance of ±0.062 inches (about 1/16” or 1.5mm). The best method for mounting or attaching unbonded silicone rubber sheet stock is via clamping mechanisms instead of adhesives.

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*Visit our interactive catalog to get Unbonded silicone sheet part numbers, price quotes or more information.


Unbonded heat seal silicone sheet applicationsSuitable for any application that benefits from a flexible yet durable non-marring, non-skid material. These include but are not limited to

  • Platens
  • Gaskets
  • Gripper Fingers


Unbonded heat seal silicone sheet specifications

  • 1/32” to 1/2" rubber thickness
  • 12” x 24” or 24” x 36” standard sheet sizes
  • FDA: 80 Shore A durometer
  • FDA-3A: 60 Shore A durometer
  • Thermosil: 60, 70, 80 or 90 Shore A durometer
  • Ultrasil: 40, 50, 60, 70, 80 or 90 Shore A durometer

 

Technical Data SheetGet the United Silicone rubber sheets technical data sheet >>
This PDF provides details on the properties of United Silicone’s Ultrasil, Thermosil, FDA and FDA-3A heat seal silicone rubber formulations. This information includes mechanical as well as other properties.


 

Get the data sheet




How to Request Pricing and Place an Order

Visit our interactive catalog to get part numbers, price quotes or find out more >>

Contact us now for more information, samples and pricing >>

 

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*Please note: ISM does not offer custom cutting of the metal bonded or unbonded United Silicone heat seal silicone sheet stock offered in our catalog.
 

More information

  • Some Heat Sealing Frequently Asked Questions >>
    Get some insights into heat seal tooling and high temperature silicone sheets plus learn more about the seal jaws, bars and heads used for heat sealing tooling. Flexible, non-marring, thermally conductive silicone can compensate for thick or multiple film layers and provide consistent, reliable, leak-proof seals and low scrap rates.
     
  • Silicone Rubber Sheet Bonding: What You Need to Know >>
    This blog post explains why it is so difficult to attach silicone rubber to metal heat seal tooling. It goes on to describe United Silicone’s solution to this problem. United Silicone rubber-to-metal bonded silicone sheets are thermally conductive, highly heat tolerant, durable and resilient.


Some downloadable resources

  • Heat Sealing Frequently Asked Questions >>
    Have any questions about using high temperature silicone rubber for heat seal tooling such as seal jaws, seal bars and seal heads? Learn how the right silicone sheet material can provide a flexible, non-marring, thermally conductive sealing face that compensates for thick or multiple film layers to provide leak-proof seals and low scrap rates.
     
  • Silicone Rubber Rollers Technical Data Sheet >>
    United Silicone rubber rollers conform readily to surface variations. Ultrasil, Thermosil, FDA and FDA-3A silicone rubbers with aluminum or steel metal cores. Suitable for a variety of high temperature tooling applications. Custom engineered and manufactured to match your application requirements.
     
  • Heat Seal Packaging Solutions Technical Data Sheet >>
    United Silicone offers a complete line of heat seal tooling for flexible packaging: silicone rubber sheets, seal heads, tooling and rollers. Ultrasil, Thermosil, FDA and FDA-3A silicone rubbers withstand temperatures, pressures and dwell times required for high temperature heat sealing and packaging tooling.
     
  • Heat Seal Silicone Rubber Sheets Technical Data Sheet >>
    A data sheet for United Silicone’s unbonded and metal bonded high temperature silicone rubber materials. This data sheet lists the various formulations with their mechanical properties and stock specifications: Ultrasil, Thermosil, FDA and FDA-3A silicone rubbers.
     
  • Heat Seal Teflon Bonded Silicone Technical Data Sheet >>
    Teflon™ (PTFE) bonded silicone rubber provides you with an alternative to wrapping silicone heat seal tools with Teflon™ tape. Robustly designed, it lasts 10x longer. Get the solution you need for packaging inconsistencies caused by food contamination, thick or multiple layers of film, product dust or fine particles.