1. Product Overview

H.B. Fuller 1521 is a two-component silicone adhesive designed for potting applications. It cures at room temperature and offers excellent sealing, bonding, and electrical insulation properties. The adhesive is easy to handle with a 6:1 mixing ratio and is suitable for automated dispensing.

Key Features & Benefits:

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

Storage & Shelf Life:

• Store in a cool, dry place in unopened containers at room temperature.
• Shelf life: 6 months from the date of manufacture.

2. Applications

H.B. Fuller 1521 is recommended for potting electronic components, particularly for junction boxes in PV modules. It provides strong adhesion, electrical insulation, and environmental resistance for long-term durability.

Typical Uses:

• Potting and encapsulation of sensitive electronic components.
• Sealing and bonding in solar module junction boxes.
• Applications requiring high thermal and electrical performance.