H.B. Fuller 2532

H.B. Fuller 2532 is a two-component addition type thermal conductive potting material with room temperature and heating fast cure silicone system. This material has excellent conductivity insulation, flame retardancy, weather resistance, and high temperature resistance. H.B. Fuller 2532 is formulated to function as a bonding, sealing, and encapsulating material for electronic components. This material performs at temperatures ranging from -60°C to 210°C.

Product Type: 2K (2 component) Sealant, Reactive Sealant

Application Area: Appliances, Batteries, Electric Vehicle (EV), Electronic Components, Encapsulant, Inverter

Chemical Family: Silicones, Siloxanes

Features: Conductive, Electrically Insulating, Excellent Sealing Capability, Fast Cure, Flame Retardant, Good Adhesion, Good Thermal Conductivity, Good Weather Stability, Heat Resistance, High Temperature Resistance, Room Temperature Curing

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Ready-to-Use Product Features
Features and Benefits
  • Halogen free•
  • RoHS compliant
  • Low odor and non-corrosive
  • Excellent thermal conductivity
  • Flame retardancy can meet UL94-V0
  • High adhesion to a variety of materials including, FRP, FR4, solder mask, glass, aluminum and composites
  • Excellent weather and high temperature resistance
  • Fast cure when heated

Applications & Uses

Application Area
Cure Method
Typical Applications
  • Electronics potting
  • Electronics thermal interface material
  • Inverter potting
  • Power device potting
General Instructions

a) For best performance bond surfaces should be clean, dry and free of any contaminants and oils

b) Part A and Part B should be blended respectively before mixing in order to make filling material distribute evenly

c) Mix evenly according to the ratio

d) Potting must be finished during the working time

e) Working time and Cure speed will vary with environment temperature

f) Moving after initial gelation and testing after full cure

g) Recommended using automatic dispensing equipment to applying the potting compound



Physical Form
Component A
ValueUnitsTest Method / Conditions
Viscosity4000 - 5000cP-
Component B
ValueUnitsTest Method / Conditions
Viscosity3000 - 4000cP-
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivity1.0 x 10¹⁵Ω.cmGB/T1692
Cured Properties
ValueUnitsTest Method / Conditions
Thermal Service Range- 60 - 210°C-
Hardness58.0-GB/T531, Shore A
Tensile Strength (50% RH)1.8MPaGB/528
Thermal Conductivity0.8W/m.KDIN EN 821
Elongation at Break (50% RH)90.0%GB/528
Uncured Properties
ValueUnitsTest Method / Conditions
Volume Mix Ratio1:1--
Weight Mix Ratio1:1--
Specific Gravity1.6--
Cure Schedule (at 120°C)10.0min-
Working Time1.0h-
Cure Schedule (at 25°C)24.0h-
Cure Schedule (at 50°C)40.0min-

Test Sample Conditions:
2mm Thickness, Cured at 50±2ºC for 40min. Tested at 23±2ºC

The values noted in this data sheet are typical properties only and are not intended to be used as material specifications. For assistance in writing a material specification, please contact H.B. Fuller Company for further details.

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Curing Conditions

Certain materials, chemicals, curing agents and plasticizers can inhibit the cure of 2530 silicone adhesive. Most notable of these include: organo-tin and other organometallic compounds; silicone rubber containing organo-tin catalyst; sulfur, polysulfides, polysulfones or other sulfur containing materials, amines, urethanes or amine containing materials, unsaturated hydrocarbon plasticizers; some flux residues. Cure performance should be checked on all substrates contacting the adhesive. Cure speed will vary with temperature, relative humidity, depth of material and presence of moisture. Some applications may require special surface preparation. Contact H.B. Fuller Company technical support for additional curing recommendations.

Packaging & Availability

Regional Availability
  • Asia Pacific
  • North America
Ordering Information

Stock No.

  • A: 25320405A, 25kg
  • B: 25320405B, 25kg

Storage & Handling

Storage Conditions

Product shall be ideally store in a cool, dry area in unopened containers. Material should be stored at a temperature of 8-25°C for a maximum shelf life of 6 months in the original unopened container. Do not return unused material back into the container.