H.B. Fuller 2536

H.B. Fuller 2536 is a two-component, room-temperature, fast-bonding silicone system. Its typical applications include glass, metal, and plastic bonding. It provides good long-term adhesion performance in high-temperature conditions. This black RTV-2 silicone is a de-alcoholized silicone with the advantages of fast curing, low odor, no solvent, no corrosion, excellent electric performance, and excellent resistance to all kinds of weather, including UV light, rainwater, hailstone impacting, etc. There is a secondary cure with atmospheric moisture that promotes full cure over 7 days.

Product Type2K (2 component) Sealant

Application AreaAppliances, HVAC Applications, Seam Sealing

Compatible Substrates & SurfacesGlass, Metal, Plastics

Chemical FamilySilicones, Siloxanes

FeaturesCorrosion Resistant, Fast Cure, Fast Setting, Good Adhesion, Good Electrical Properties, High Temperature Performance, Low Color Formation, Low Odor, Room Temperature Vulcanizing, UV Resistant, Wide Temperature Operating Range

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Features and Benefits
  • Fast curing
  • RoHS compliant and Halogen free
  • Non-corrosive, low odor
  • Excellent adhesion to a wide variety of substrates including glass, metal and plastics
  • Wide operating temperature range
  • Very fast setting and fast curing enabling reduced production times

Applications & Uses

Compatible Substrates & Surfaces
Typical Applications
  • Seam sealing
  • Bonding to Glass, Plastic and Metals
  • Bonding and sealing in appliance applications
  • General assembly sealing
General Instructions

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

b) Mix Parts A and B evenly according to the applicable mix ratio. Machine meter mix is recommended.

c) Apply the mixture to the surface or seam. Automated dispensing equipment is recommended for seam sealing applications.

d) Excess materials can be removed after the fixture time.

e) It is recommended to schedule a timely purge for the use of mixed material in the static mixer. This is done to avoid inconsistent mixing and to ensure desired performance and properties.

f) Material is a secondary moisture-cure type material. It will start to cure immediately after mixing two-components. Moisture in the air will assist to cure material.


Physical Form
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivity4.0 x 10¹⁴Ω.cmGB/T1692
Breakdown Voltage20.0kV/mmGB/T1695
Cured Properties
ValueUnitsTest Method / Conditions
Elongation at Break (50% RH)200.0%GB/528
Tensile Strength (50% RH)2.4MPaGB/528
Thermal Service Range- 40 - 200°C
Hardness41.0GB/T531, Shore A
Lap Joint Shear Strength (Aluminum, 50% RH)1.3MPaGB/T7124
Damp Heat Aging Test Properties
ValueUnitsTest Method / Conditions
Hardness32.0GB/T531, Shore A
Elongation at Break (50% RH, 85°C, for 1000h)180.0%GB/528
Shear Strength (50% RH)1.0MPaGB/T7124
Tensile Strength (50% RH)1.8MPaGB/528
Uncured Properties
ValueUnitsTest Method / Conditions
Fixture Time20 - 30min
Weight Mix Ratio12.2:1
Volume Mix Ratio10:1
Specific Gravity1.28
Working Time10.0min
Cure Schedule (at 25°C)24.0h
Cure Schedule (at 45 - 55% RH)7.0days
Rheological Properties
ValueUnitsTest Method / Conditions
ViscosityThixotropic paste

Test Sample Conditions:
2mm Thickness, Cured at 23±2ºC, 50±5%RH for 7 days. 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.

Technical Details & Test Data

Curing Conditions

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
  • North America
Ordering Information

Stock No.

  • 253601, 410ml
  • 25360105, Part A: 220kg, Part B: 18kg

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 5-25°C for a maximum shelf life of 6 months in the original unopened container. Do not return unused material back into the container.