Sealite manufactures their marine buoys on-site with state-of-the-art Rotational Moulding equipment using UV-stabilised polyethylene. Polyethylene is one of the most common plastics used today and due to it’s light weight, strength and versatility it is used to make bottles, toys and even bulletproof vests.
Sealite uses a Hexene co-polymer based Linear Low-Density Polyethylene resin (LLDPE) which is specifically designed for rotational moulding applications. LLDPE has a higher tensile strength and exhibits greater impact and puncture resistance compared to some other plastics. It has been chosen as the material for Sealite marine buoys because of its high Environmental Stress Cracking Resistance (ESCR), toughness, flexibility and minimal impact on the environment.
Why use Virgin Polyethylene?
Polyethylene fl oat and tower components never require painting and retain their vibrant colour. Sealite buoys offer a service life of up to 20 years.
Reduced weight of Polyethylene buoys also supports the use of a smaller vessel with reduced lifting capacities.
With reduced buoy weight comes a lower centre of gravity with improved static stability and reduced draft resulting in reduced water loads and increased visibility above water when achieving like focal plane heights.
Reduced mass and therefore inertias means that buoys have shorter natural periods. This reduces the effect of long period wave motion on buoys.