Plastic in all its forms is everywhere and has been with us for many years. Similar to other manufacturing materials, modern plastic is recyclable and very weldable, so not only can you repair broken / damaged parts you can also add to, customise or make our own items for example water tanks, buoys, covers, tarps etc. Let’s keep it simple:Narrowing it down to two types of plastic:1. Thermo set - GRP – Glass reinforced plastic commonly known as FIBRE GLASS. Not weldable. 2.