Tonsan® 1521 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 good thermal conductivity and flame retardancy.

RTU Product Type: 2K (2 component) Adhesive, Encapsulant, Potting Compound

Application Area: Blades, Edge Gluing, Energy Storage, Frame Sealing, Ingot Bonding, Lithium-Ion Battery, Module Installation, PV J-Box Potting, PV Modules, Rail Bonding, Turbines

Chemical Family: Silicones

Features: Excellent Dielectric Properties, Fast Cure, Flame Retardant, Good Thermal Conductivity, Good Weather Fastness

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Markets
Applications
Application Area
Cure Method
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.

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

Properties

Color (Properties)
Physical Form
Appearance
White viscous liquid
Typical Properties
ValueUnitsTest Method / Conditions
Curing Temperature (at 45 - 55% RH, 7 days)21 - 25°C-
Electrical Properties
ValueUnitsTest Method / Conditions
Dielectric Strength23kV/mmGB/T 1695
Volume Resistivity1.0 x 10¹⁵Ω-cmGB/T 1692
Technical Data
ValueUnitsTest Method / Conditions
Mix Ratio (by volume)4:1--
Nominal Service Temperature- 50 to 150°C-
Density (mixed)1.4g/cm³GB/T 13354
Thermal Conductivity0.3W/mKDIN EN 821
Mix Ratio (by weight)6:1--
Cured Properties
ValueUnitsTest Method / Conditions
Flash Pointmin. 93°CGB/T 5208
Hardness40Shore AGB/T 531
Tensile Strength1.2MPaGB/T 528
Elongation at Break110%GB/T 528
Gel Time (glue does not flow)60minutes-
Work Life (viscosity higher than 30000 mPa·s)8m-
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 (activator)25mPa.sGB/T 2794
Viscosity (mixed)3000mPa.sGB/T 2794
Viscosity (resin)7000mPa.sGB/T 2794

Packaging & Availability

Country Availability
Regional Availability
  • Asia Pacific
  • Europe
  • India/MiddleEast/Africa (IMEA)
  • North America

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.