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Biohesive^® 225

Biohesive^® 225 is a high performance Silicone RTV adhesive sealant for use with Champion Environ's anti-fouling subsea marker systems. It is a rapid curing adhesive, skinning within a few minutes and curing overnight, depending on the ambient conditions.

One of the major advantages offered by Biohesive^® 225 is that it can be used in geographical locations with high temperatures (>30°C/85°F) and/or high humidity (75% +) without causing significant performance issues, although the skinning time will reduce. The adhesive becomes more viscous in cold conditions but is still useable so long as the temperature is above 2°C (36°F).

Biohesive^® 225's pasty consistency allows it to be used in vertical and overhead applications. In its cured state it is tough yet extremely flexible, allowing its use in applications where rigid adhesives would not be considered.

As a single component adhesive, it requires no mixing or metering of curatives, instead relying on atmospheric moisture to cure. This means that the application of Biohesive^® 225 is very straightforward, using just a basic caulking gun (also known as a mastic or skeleton gun). Biohesive^® 225 is supplied in a 310ml cartridge to match the most common size of caulking guns.

Providing the material is stored in the correct conditions as outlined in the datasheet, the shelf-life of Biohesive^® 225 is 24 months, which is considerably longer than conventional epoxy or polyurethane adhesives. In addition, unlike two-component adhesives, cartridges of Biohesive^® 225 can be re-used; following application, the tip of the cartridge will automatically cure and seal the remainder of the material against atmospheric moisture.

Biohesive^® 225 has been tested against several two component polyurethane and epoxy adhesives, including Aquahesive^™ 5836, and has shown good adhesive strength to a variety of substrates. In addition, it has shown exceptional resistance to seawater in ageing trials. Biohesive^® 225 has exceptional heat resistance with an upper limit of temperature in application of 200°C (390°F) and retains its flexibility at temperatures of -65°C (-85°F).

Biohesive^® 225 will not interfere with or suffer any disbondment / loss of adhesion from cathodic protection systems.

Biohesive^® 225 contains no toxic components so does not require special labels for transport or use. It cures to a harmless solid making disposal of part-used or an empty cartridge extremely straightforward. For use, standard PPE is recommended; goggles and gloves.

The introduction of Biohesive^® 225 into Champion Environs' portfolio offers a technically sound solution whilst strengthening our environmental credentials.

Find out why Biohesive^® 225 is Champion Environ's recommended adhesive by downloading our comparison table.