Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation
Silicone Potting & Encapsulation Gel

Ray Gel - Silicone Gel for PCB Potting & Electronic Encapsulation

Fast-Setting, Re-Enterable Silicone Protection for PCBs, LEDs, Displays and Electrical & Electronic Connections

Ray Gel is a two-component, permanently soft silicone gel for PCB potting and electronic encapsulation. Used as a soft PCB encapsulant and electronic potting gel, it provides electrical insulation and environmental sealing while preserving access to protected components after cross-linking.

Before setting, its fluid consistency allows it to flow around connections and components. After cross-linking, Ray Gel remains soft and re-enterable, allowing protected electrical and electronic connections to be inspected, modified or repaired later.

Ray Gel is available in transparent and red formulations for different application needs. The transparent formulation is particularly suited to PCBs, LEDs and displays where visibility of protected components matters, while the red formulation is designed for UV-exposed surface installations.
  • Flows around components before setting Its fluid consistency helps Ray Gel surround electrical and electronic components before cross-linking.
  • Remains soft and re-enterable Protected connections can be accessed later for inspection, modification or repair.
  • Continuous operation from -60°C to +180°C Designed for demanding operating temperatures, with short-term overload capability up to 250°C.
Price
Regular price $1917
Regular price Sale price $1917
/
Size
Color Transparent

Technical Snapshot

>20 kV/mm Dielectric StrengthHigh dielectric performance for electrical and electronic insulation.
-60°C to +180°C Continuous Operating RangeShort-term overload capability up to 250°C.
<10 min Setting TimeSets in under 10 minutes at 25°C.
Very High Removal FacilityHighly removable after installation for future access.
WHY RAY GEL

Key Benefits

Flows Around Components Before Setting

Ray Gel's fluid consistency helps it surround components, conductors and connections before cross-linking.

Stays Accessible

Ray Gel remains soft after cross-linking and has very high removal capability, helping preserve access for future inspection, modification or repair.

Built for Demanding Environments

Designed for continuous operation from -60°C to +180°C, with very low water absorption and suitability for indoor, outdoor, underground and submerged installations in proper casings.

Reliable Electrical Insulation

>20 kV/mm dielectric strength and >2 x 10^15 ohm-cm volume resistivity provide dependable insulation around electrical and electronic connections.

Transparent Formulation Keeps Components Visible

The transparent formulation keeps PCBs, LEDs and displays visible through the protective gel, making visual inspection easier without removing the material.

Choose the Right Ray Gel Formulation

Ray Gel is available in red and transparent formulations designed for different applications. The red version is specifically formulated for UV resistance and surface installations, while the transparent version is intended for applications where visibility of protected electronic components is important.

UV resistance applies to Red Ray Gel only.

RED RAY GEL

UV-Resistant Protection for Surface Installations

Red Ray Gel is designed for applications where the material may be exposed to UV light at the installation surface.
  • Specially formulated for UV resistance
  • Suitable for surface installations
  • Ideal for intercom systems
TRANSPARENT RAY GEL

Transparent Protection for PCBs, Displays & LEDs

Transparent Ray Gel is designed for electronic potting and encapsulation applications where protected components should remain visible.
  • Excellent transparency
  • Does not opacify
  • Ideal for protecting printed circuit boards, sealing displays, and insulating and sealing LEDs

Choose Red Ray Gel where UV resistance is required. Choose Transparent Ray Gel where visibility of PCBs, LEDs, displays or other protected components is important.

PCB Potting & Electronic Encapsulation

Populated circuit board partially coated in clear silicone gel, showing the boundary between the gel-covered area and exposed components.

Printed circuit boards and electronic assemblies can be exposed to moisture, dust, contamination and other environmental conditions that can reduce reliability over time. Ray Gel provides a permanently soft electronic potting gel that surrounds protected components while maintaining electrical insulation and future access.

Ray Gel also has very high self-fusing capability. When new material is applied over previously cross-linked Ray Gel, the new layer can fuse with the existing gel, supporting re-entry and resealing after service.

For PCB encapsulation and circuit board encapsulation applications, Ray Gel flows around the protected area before cross-linking and remains soft after setting. This makes it particularly useful where permanent rigid encapsulation is not required and the PCB or electronic assembly may need to be inspected, serviced or modified later. Where visual inspection of the protected assembly is important, use the transparent Ray Gel formulation so protected components remain visible.

For applications where a silicone potting compound for electronics is appropriate, Ray Gel provides a permanently soft, re-enterable alternative to a rigid cured mass.

Want to compare potting materials and methods? Read our Complete Guide to PCB Potting & Electronic Encapsulation.

LED Potting, LED Encapsulation & Display Protection

LED assemblies and displays often require electrical insulation and environmental sealing without unnecessarily obscuring the protected components. Ray Gel's transparent silicone formulation is designed for PCB, display and LED applications where visibility matters.

For LED and display applications where transparency is required, use the transparent Ray Gel formulation.

For LED potting and LED encapsulation, Ray Gel forms a permanently soft protective gel while allowing the components beneath it to remain visible. Its fast cross-linking, high dielectric strength and re-enterable structure make it particularly useful where protection and future access both matter.

For applications where a clear potting compound is being considered, transparent Ray Gel provides a soft silicone-gel alternative that does not become a rigid encapsulating mass.

Application suitability should still be confirmed against Ray Gel's electrical, thermal and environmental specifications.

Electrical Potting Gel for Telecom Connections

Security camera and connection enclosure with an illustrative cutaway showing red protective gel.

Telecom, intercom and other low-current signal connections can be especially sensitive to moisture and oxidation at their contact points. In humid, underground or water-exposed enclosures, this can increase resistance and contribute to signal degradation. Ray Gel is a permanently soft electrical potting gel that insulates and seals these connections while preserving access for future service.

Flows Around Conductors and Into Confined Spaces

Before cross-linking, Ray Gel flows around cable conductors, terminals and connection points, filling small spaces where moisture and contamination can otherwise reach sensitive telecom contacts.

Unlike rigid filling materials, Ray Gel remains soft and highly removable after cross-linking. This helps prevent brittle cracking in demanding environments while allowing connections to be inspected, tested, modified or resealed later.

Its high dielectric performance and very low water absorption support reliable insulation in humid and water-exposed installations. In a suitable enclosure, Ray Gel creates an IP68-rated finished installation when used in proper casing.

Looking for additional electrical potting solutions? Explore our Low Voltage products.

For intercom systems or other surface installations exposed to UV light, use Red Ray Gel. UV resistance applies only to the red formulation.

Ray Gel for Outdoor, Underground & Submerged Installations

Electrical and electronic installations exposed to water, moisture and changing environmental conditions require protection that extends beyond basic electrical insulation. Ray Gel is suitable for use in proper boxes and casings installed indoors, outdoors, underground or submerged.

Ray Gel is specified as IP68 in proper casings. The complete installation still matters: the enclosure, cable entries and other components must be suitable for the intended environment for the finished system to provide the required protection.

Its cross-linked formulation has very low water absorption and is mould resistant. Raytech also reports no adverse effect from salt water, sea water or chlorine environments.

Continuous operation from -60°C to +180°C further supports use across demanding outdoor and water-exposed installations.

Planning protection for water-exposed electronics? See our Complete Guide to Waterproofing Electronics & PCBs.

For installations exposed to UV light, use the red Ray Gel formulation. UV resistance is specific to the red version and should not be assumed for transparent Ray Gel.
Comparison

Soft, Re-Enterable Gel vs. Permanent Rigid Potting

Permanent Rigid Potting (Typical) Ray Gel
Removal after installation Typically difficult or impractical after cure Very high removal facility
Self-fusing after re-entry Typically not applicable Very high self-fusing capability
Future maintenance access Often difficult once cured Components remain accessible
Finished material Typically rigid or load-bearing Permanently soft silicone gel
Best suited for Applications where permanent structural encapsulation is desired Applications where protection and future serviceability both matter

Potting materials are designed for different requirements. Rigid encapsulation can be appropriate where permanent structural protection is the objective. Ray Gel is designed for applications where electrical insulation and environmental sealing are required while future access to the protected components remains important.

Compare potting materials, methods and tradeoffs in our PCB Potting & Electronic Encapsulation Guide.

Ray Gel Technical Performance

Ray Gel combines high dielectric performance, permanent softness, fast cross-linking and environmental sealing for electrical and electronic applications.

The values below are based on the Ray Gel Technical Data Sheet and should be reviewed together with the full technical documentation when evaluating an application.
Electrical
Dielectric Strength >20 kV/mm
Dielectric Constant / Permittivity (@ 1 kHz) <5
Volume Resistivity >2 × 10¹⁵ Ω·cm
Voltage Rating Up to 0.6-1 kV (Um 1.2 kV)
Thermal
Continuous Working Temperature -60°C to +180°C
Installation Temperature -5°C to +45°C
Overload Temperature for Limited Times 250°C
Thermal Conductivity Approx. 0.2 W/mK
Physical
Product Type Two-Component Silicone Gel
Available Color Red or Transparent
Viscosity Approx. 1600 mPa·s @ 23°C
Gel Time Approx. 5 min @ 23°C
Setting Time Under 10 min @ 25°C
Cure Reaction Non-Exothermic
Hardness Approx. 0 Shore 00
Water Absorption (30 days) <<0.05%
Shelf Life Unlimited if stored suitably in original closed packaging; avoid prolonged exposure ≥40°C; use within 5 years recommended as a precaution
Environmental / Use
Flame Classification UL 94-HB
Degree of Protection IP68 (in proper casings)
Halogen Halogen-free
Mould Resistance Resistant
Salt Water / Sea Water / Chlorine (Cross-Linked Product) No adverse effect
Installation Type In box or casings — indoors, outdoors, underground or submerged
Removal Facility After Installation Very high
Self-Fusing (new layer over old) Very high
Hazard Classification Not classified as hazardous (CLP Regulation (EC) No 1272/2008)

Technical Resources

Review the Ray Gel technical documentation for detailed product properties, application guidance and precautions for use.
Ray Gel Technical Data Sheet PDF
Download

Ray Gel FAQ

What is PCB potting?

PCB potting is the process of surrounding a printed circuit board or electronic assembly with an insulating or protective material. Ray Gel provides a permanently soft, re-enterable silicone-gel option for PCB potting where electrical insulation, environmental sealing and future access are important.

For a deeper explanation of potting materials and methods, see our Complete Guide to PCB Potting & Electronic Encapsulation.
Can Ray Gel be used for PCB potting and encapsulation?

Yes. Ray Gel is suitable for electronic circuits and can be used for PCB potting, PCB encapsulation and circuit board encapsulation applications that are compatible with its technical specifications. The transparent formulation is particularly useful where visibility of the protected components matters.
Why use a transparent silicone gel for electronic encapsulation?

A transparent silicone gel can provide electrical insulation and environmental sealing while keeping the protected components visible. Ray Gel's transparent formulation is specifically suited to printed circuit boards, displays and LED applications and remains permanently soft after cross-linking. For UV-exposed surface installations, use Red Ray Gel instead because UV resistance applies only to the red formulation.
What is the difference between Red and Transparent Ray Gel?

Red and Transparent Ray Gel share the core electrical insulation, sealing and re-enterable characteristics of the Ray Gel product family, but they are intended for different application needs. Red Ray Gel is specially formulated for UV resistance and is suitable for surface installations, including intercom systems. Transparent Ray Gel provides excellent transparency, does not opacify, and is specifically suited to printed circuit boards, displays and LED applications. UV resistance applies only to the red formulation.
Can Ray Gel be used for LED potting and encapsulation?

Yes. The transparent formulation of Ray Gel is specifically suited to insulating and sealing LEDs. Its transparency allows the protected components to remain visible, while the permanently soft structure preserves greater future access than rigid permanent encapsulation.
Is Ray Gel re-enterable after cross-linking?

Yes. Ray Gel has very high removal capability after installation. New Ray Gel can also self-fuse with previously cross-linked material, allowing the protected area to be reopened and resealed when future access is required.
Can Ray Gel be used in underground or submerged installations?

Yes, when used in suitable boxes or casings. Ray Gel is documented for indoor, outdoor, underground and submerged installations. The complete enclosure and installation must still be appropriate for the intended environment.
What does IP68 mean for Ray Gel?

Ray Gel is specified as IP68 in proper casings. When used in a suitable enclosure that provides the required solid-ingress protection, Ray Gel seals against water and helps create an IP68 system. The finished installation, not the gel alone, determines the overall level of protection.
How fast does Ray Gel set?

Ray Gel has an approximate gel time of 5 minutes at 23°C and sets in under 10 minutes at 25°C. Setting time varies with temperature.
Support

Discuss Your Application

Not sure whether Ray Gel is right for your PCB potting, LED encapsulation or electrical sealing application? Tell us what you are protecting, the operating environment and the approximate volume required. Our team can help with product fit, package selection and volume requirements.

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Shipping information

If you have time-sensitive requirements, we recommend selecting a UPS service at checkout. UPS generally offers more consistent transit performance, while USPS transit times can vary.

Orders are processed within 1–2 business days, with most orders placed before 2 PM EST shipping the same day. We offer a full range of USPS and UPS shipping options, including expedited and next-day delivery for urgent requirements.
Product Selection Guide

Choose the Right Raytech Product

Use this guide to compare Raytech waterproof electrical protection products by application, serviceability, and installation method.

Magic Gel re-enterable waterproof electrical potting compound
General dielectric gel

Magic Gel

Best for: general waterproof potting and electrical insulation.

Choose Magic Gel when you need a dielectric gel for filling an enclosure, junction box, or electrical connection while keeping future access possible.

IP68 System Re-enterable Low Viscosity
View Magic Gel
Magic Power Gel reusable waterproof electrical potting compound
Reusable gel protection

Magic Power Gel

Best for: reusable waterproof protection.

Choose Magic Power Gel when future access and reusability matter. It is a strong option when the connection may need to be opened and resealed later.

IP68 System Re-enterable Reusable Self-Amalgamating
View Magic Power Gel
Techno Gelgum waterproof vibration damping potting compound
Gel-rubber protection

Techno Gelgum

Best for: vibration damping and mechanical hold.

Choose Techno Gelgum when the connection is exposed to movement, vibration, mechanical stress, or demanding submerged conditions. Even suitable for high depths under water.

IP68 System Re-enterable Gel-Rubber Vibration Damper High-Depth Use
View Techno Gelgum
Magic Rubber flexible rubber waterproof electrical potting compound
Flexible rubber compound

Magic Rubber

Best for: stronger mechanical structure.

Choose Magic Rubber when you need more structure than a soft gel, but do not want to permanently encapsulate the connection with hard epoxy.

IP68 System Re-enterable Flexible Rubber Mechanical Support
View Magic Rubber
Magic Gel Sprint fast curing waterproof electrical potting compound
Fast-curing dielectric gel

Magic Gel Sprint

Best for: fast curing waterproof potting and electrical insulation.

Choose Magic Gel Sprint when you need a re-enterable dielectric gel with a faster curing time for quicker installations or faster return to service.

IP68 System Re-enterable Fast Cure Low Viscosity
View Magic Gel Sprint
Ray Gel transparent re-enterable dielectric potting gel
Transparent, re-enterable gel

Ray Gel

Best for: transparent, re-enterable electrical and electronic protection.

Choose Ray Gel when you need a low-viscosity dielectric gel with transparent, re-enterable protection for electrical connections, junction boxes, or PCB and LED applications where visibility matters.

IP68 System Transparent Re-enterable Low Viscosity
View Ray Gel
Wonder Gel ready-to-use cartridge electrical gel
Cartridge gel

Wonder Gel

Best for: overhead and hard-to-reach junction boxes.

Choose Wonder Gel when you need a ready-to-use cartridge gel for overhead, vertical, or hard-to-reach junction boxes where pouring is difficult or not practical.

IP68 Cartridge No Mixing Ready-to-Use
View Wonder Gel
Raytech prefilled gel box waterproof wire connector protection
Prefilled connector boxes

Prefilled Gel Boxes

Best for: wire connectors and terminal blocks.

Choose prefilled gel boxes when you want a ready-to-use solution for protecting wire connectors or terminal blocks without mixing, pouring, or curing.

IPX8 Prefilled No Mixing Ready-to-Use
View Gel Boxes
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