Choose another country or region to see content specific to your location.

Polyurethane Potting Compounds

Electrolube resins in use.
  • Good flexibility, even at low temperatures
  • Ideal for delicate components
  • Good for complex geometries
  • Exceptionally wide range of hardness options available
  • Good to excellent water resistance

Electrolube Polyurethane resins are specialist systems for potting and encapsulating printed circuit boards (PCBs), electronic components and devices. Polyurethane resin systems are designed to insulate the device from harsh environments acting as a barrier against contaminates such as moisture, chemicals and protection against physical shock and vibrations.

More info > Download product selector chart > Download product brochure >

Polyurethane encapsulants offer several advantages over epoxies and silicones. They provide chemical, dust and moisture resistance, as well as exhibiting excellent electrical resistance and flexibility. They also have good adhesion to most substrates, both metal and plastic.

Due to the nature of the urethane bond, in general it is recommended that a maximum continuous service temperature of 130°C is observed.

Polyurethane resins generally have much faster cure times than epoxies and exhibit more flexibility and a wider range of shore hardness. Due to their elastomeric or rubbery state when cured, polyurethane resins are often the preferred choice when the electronics being potted which contain delicate components. This has led to wide a wide range of applications in the automotive and home appliance industries and increasingly polyurethane resins are being used as LED potting compounds for internal and external lighting applications.

Traditionally polyurethane resins can demonstrate a lower water resistance, especially at high temperatures, however Electrolube offer a range of products formulated especially for water resistance and are well suited to the automotive and marine industries. Similar to epoxies, the polyurethane resins usually come in two component systems, but usually display lower exotherm during the cure process, even with the faster curing systems.

Basic Key Properties:

  • Good flexibility, even at low temperatures
  • Ideal for delicate components
  • Good for complex geometries
  • Exceptionally wide range of hardness options available
  • Good to excellent water resistance

For More details on the Chemistry of Polyurethane resins, have a look at our knowledge centre articles below:

Encapsulation Resins

Polyurethane Potting Compound

UR5562, Discontinued - Optically Clear Polyurethane Resin

UR5562, Discontinued
Optically Clear Polyurethane Resin

250g - 500g - 1KG - 5KG - 25KG

Product code: UR5562RP250G - UR5562RP500G - UR5562K1K - UR5562K5K - UR5562K25K

This Product Has been Superseded with: UR5634, UR5638 and UR5640

The following product has been discontinued and superseded with the listed replacement. While the replacement product will exhibit improved characteristics, we would always advise further testing to ensure the product is suitable for your application. '


UR5562 is a Semi-rigid, optically clear polyurethane potting compound.

Due to its careful chemical makeup, it is extremely durable and therefore suitable for a range of applications.

Its excellent resistance to scratching or marking give a good cosmetic appearance, along with its water white transparency, make it an ideal choice for LED potting and encapsulation.

It also displays a high resistance to weather, UV light and and mould growth making it a good choice for exposed applications such as outdoor lighting.

It also maintains a high resistance to acids and alkalis giving it good scope for different environments.


Key Properties:
  • Water white transparency, ideal for potting LEDs
  • Excellent resistance to yellowing when exposed to UV light
  • Excellent scratch and mark resistance
  • High resistance to weather, acids and alkalis, water and mould growth
  • RoHS Compliant


Product data sheets
UR5562 (tds) Download

Log into our MSDS database for Safety Data Sheets: MSDS