Every Hydrofin kit comes complete with two 400ml tubes of Plexus MA8120 structural adhesive, which are needed for a secure and durable installation. Plexus MA8120 is a high-performance, two-part structural adhesive that is widely used for bonding materials in demanding applications, including marine environments. It is formulated to provide exceptional strength and durability, making it ideal for bonding metals, plastics, composites, and other substrates commonly found in boats and other watercraft.
Strength and Durability
Plexus MA8120 is renowned for its impressive strength. It offers excellent shear and peel strength, making it a reliable choice for structural bonding in environments that experience high stress and mechanical forces. The adhesive forms a strong, lasting bond that resists fatigue, ensuring that the bonded materials stay intact even under harsh conditions.
The durability of Plexus MA8120 comes from its resistance to environmental factors such as moisture, UV light, and temperature fluctuations. This makes it especially suitable for use in marine environments where exposure to water, salt, and extreme temperatures is a constant concern. The adhesive maintains its integrity in these conditions, ensuring long-term performance without degradation.
Working and Cure Time
Plexus MA8120 has a convenient working time, allowing users to apply and adjust the bond before it fully sets. The typical working time for the adhesive is between 10 to 20 minutes at room temperature, depending on the specific conditions. This allows ample time for positioning the parts being bonded.
The cure time for Plexus MA8120 is relatively quick compared to many other adhesives. It typically reaches handling strength within 1 to 2 hours, with full cure achieved in 24 hours. Temperature, humidity, and the thickness of the adhesive layer can influence cure times, so it’s important to follow the manufacturer’s instructions for optimal results.

Key Benefits of Plexus MA8120
- High Strength: Delivers superior shear and peel strength, making it ideal for structural bonding.
- Durability: Provides excellent resistance to moisture, UV exposure, and temperature extremes.
- Marine-Ready: Specifically formulated to perform in harsh marine environments, preventing rust and corrosion.
- Fast Cure Time: Sets quickly, achieving handling strength in just 1 to 2 hours.
- Versatile: Suitable for bonding a wide variety of materials, including metals, composites, and plastics.


