Tonsan® 1533 White is a two-component adhesive that can cure quickly at room temperature, providing excellent sealing and bonding. This material is recommended for potting electronic components, particularly junction boxes on PV modules. It has excellent dielectric properties and V1 flame retardancy.

Product Type2K (2 component) Adhesive, Encapsulant

Application AreaBlades, Edge Gluing, Energy Storage, Frame Sealing, Ingot Bonding, Lithium-Ion Battery, Module Installation, PV Modules, Rail Bonding, Turbines

Chemical FamilySilicones

FeaturesExcellent Dielectric Properties, Excellent Electrical Performance, Excellent Substrate Adhesion, Fast Cure, Flame Retardant, Good Fluidity, Good Gap Filling Capabilities, Good Thermal Conductivity, Good Weather Fastness

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Applications & Uses

Curing Profile

Recommended cure: 21 - 25°C, 45 - 55%RH for 7 days

Application Instructions
  • Part A should be blended thoroughly before mix with Part B in order to make filling material distribute evenly.
  • Mix evenly according to the ratio.
  • Pot the mixed material.
  • Recommended using automatic dispensing equipment to applying the potting compound.


Physical Form
White viscous liquid
Thermal Properties
ValueUnitsTest Method / Conditions
Thermal Service Range- 50 - 200°C
Thermal Conductivity0.3W/m.KDIN EN 821
Cured Mechanical Properties
ValueUnitsTest Method / Conditions
Hardness45.0GB/T 531, Shore A
Tensile Strength1.0MPaGB/T 528
Elongation at Break100.0%GB/T 528
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivity1.0 x 10¹⁵Ω.cmGB/T 1692
Breakdown Strength20.0kV/mmGB/T 1695
Technical Data
ValueUnitsTest Method / Conditions
Mixed Density1.26g/cm³GB/T 13354
Volumetric Mix Ratio4:1
Weight Mix Ratio5.5:1
Viscosity1000 - 3000cP
Working Timemin. 8min
Cured Properties
ValueUnitsTest Method / Conditions
Flash Pointmin. 93°CGB/T 5208
Working Time (Viscosity higher than 30000 mPa·s)8.0min
Gel Time60.0min
Damp Heat Aging Test Properties
ValueUnitsTest Method / Conditions
Volume Resistivity (at 85°C, 85% RH, 1000h)1.0 x 10¹⁵Ω.cmGB/T 1692
Rheological Properties
ValueUnitsTest Method / Conditions
Viscosity (Resin)4000.0mPa.sGB/T 2794
Viscosity Activator50.0mPa·sGB/T 2794
Viscosity (Mixed)2000.0mPa.sGB/T 2794

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • China
  • Europe (Excluding Russia)
  • India
  • Middle East
  • North America
  • South East Asia

Storage & Handling

Shelf Life
6 Months
Storage Condition

Product shall be ideally stored in a cool, dry area in unopened containers at room temperature. Keep away from children.