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H.B. Fuller 1521 White Silicone potting junction boxes in PV modules

  • Technology: Silicone
  • Brand Name: H.B. Fuller 1521
  • Manufacturer: H.B. Fuller
  • Package Size: 14kg
  • Shelf Life: 6 months

H.B. Fuller 1521 White Silicone Potting for Junction Boxes in PV Modules:

1. Product Overview

H.B. Fuller 1521 is a two-component silicone adhesive that cures at room temperature, offering fast curing, excellent sealing, and strong adhesion. It is specifically designed for potting electronic components, particularly junction boxes in PV modules.

Key Features & Benefits:

  • Fast curing at room temperature with excellent deep-section cure.
  • Easy handling with a 6:1 mixing ratio.
  • Strong adhesion to various substrates.
  • Suitable for automated dispensing.
  • Excellent electrical insulation properties.
  • High resistance to hot and humid environments.

2. Applications

  • Potting of junction boxes in PV modules.
  • Encapsulation of electronic components requiring electrical insulation.
  • Industrial applications requiring high-performance silicone adhesives.

3. Typical Properties

Property Value Test Method
Rheology
Viscosity (Resin) 7000 mPa·s GB/T 2794
Viscosity (Activator) 25 mPa·s GB/T 2794
Viscosity (Mixed) 3000 mPa·s GB/T 2794
Density
Mixed Density 1.40 g/cm³ GB/T 13354
Mix Ratio
Volumetric Ratio 4:1
Weight Ratio 6:1
Curing Properties
Flash Point > 93°C GB/T 5208
Working Time 8 minutes
Gel Time 60 minutes
Cured Mechanical Properties
Hardness (Shore A) 40 GB/T 531
Tensile Strength 1.2 MPa GB/T 528
Elongation to Break 110% GB/T 528
Thermal Properties
Service Temperature Range -50°C to 150°C
Thermal Conductivity 0.30 W/m·K DIN EN 821
Electrical Properties
Volume Resistivity 1.0 × 10¹⁵ Ω·cm GB/T 1692
Breakdown Strength 23 kV/mm GB/T 1695
Damp-Heat Aging (85°C, 85% RH for 1000h)
Volume Resistivity 1.0 × 10¹⁵ Ω·cm GB/T 1692

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