Tonsan® 1523 is a white, one-component, neutral to moisture in the air adhesive. It is recommended for bonding with fast and excellent adhesion for glass, aluminum alloy, etc., and is an alkoxy-cure silicone adhesive that cures at room temperature when exposed to the back rail of a PV module. This material also has high performance.

Product Type: 1K (1 component) Adhesive, Encapsulant, Reactive Adhesive

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

Compatible Substrates & Surfaces: Aluminum Alloys, Glass

Chemical Family: Silicones

Features: Enhanced Damp Proofing, Excellent Performance, Excellent Substrate Adhesion, Fast Cure, Good Weather Stability, High Insulation Properties, High Performance, Improved Ageing Resistance, Low Odor, Room Temperature Curing, UV Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Cure Method
Application Instructions
  • For best result, clean and dry all surface to be sealed.
  • Use double sticky tape on the surface of aluminum alloy back rail for bonding and positioning (the distance between of the tape is about 300mm - 400mm, tape thickness is about 3 - 5mm).
  • Apply a continuous and even bead of silicone adhesive to the surface of aluminum alloy.
  • Then bond immediately.

Recommended cure: Curing depth is 2mm at 21 - 25°C, 45 - 55% RH for 24h


Physical Form
White paste
Cured Mechanical Properties
ValueUnitsTest Method / Conditions
Hardness*45.0-ISO7619, GB/T531, Shore A
Elongation at Break*260.0%ISO37, GB/T528
Tensile Strength*2.5MPaISO37, GB/T528
Adhesion Strength*2.0MPaISO4587, GB/T7124
Electrical Properties
ValueUnitsTest Method / Conditions
Volume Resistivity1.0 x 10¹⁵Ω.cmIEC60093, GB/T1692
Breakdown Tension20.0kV/mmIEC 60243 -1, GB/T16- -95
Technical Data
ValueUnitsTest Method / Conditions
Cured Properties
ValueUnitsTest Method / Conditions
Flash Point93.0°CISO3679,GB/T 5208-2008
Cure Speed (Fixture/full, Cured at 21 - 25°C, 45 - 55% RH, 2mm)3.0min/24h-
Operating Temperature Range- 54 - 210°C-
Damp Heat Aging Test Properties
ValueUnitsTest Method / Conditions
Elongation at Break (at 85°C, 85% RH, for 1000h)260.0%-
Tensile Strength (at 85°C, 85%RH, 1000h)1.8MPa-
Adhesion Strength (at 85°C, 85% RH, 1000h)1.5MPa-
Rheological Properties
ValueUnitsTest Method / Conditions
ViscosityWhite paste--

* - Measured on cured sheets approx. 2mm. Cured at 21 - 25°C, 45 - 55 % RH for 14 days, tested at 21 - 25°C

Regulatory & Compliance

Certifications & Compliance

Safety & Health

Safety and Disposal
  • Allow adequate ventilation when using.
  • Avoid prolonged skin contact.
  • In case of eye contact, flush with water and seek medical attention.
  • This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials.

Packaging & Availability

Country Availability
Regional Availability
  • Asia Pacific
  • China
  • North America
Packaging Information
  • 310 ml
  • 400 ml
  • 270 kg

Storage & Handling

Storage Condition

Product shall be ideally store in a cool, dry area in unopened containers at a temperature between 8°C to 28°C unless otherwise labeled. Optimal storage is at the lower half of this temperature.