Methods for manufacturing floating pontoon blocks, and pontoon blocks produced using such methods are claimed. According to the above-mentioned methods, a polymer raw material is extruded with the aid of an extruder (2), the raw material being recycled polyethylene, a product of refuse recycling. In the methods, vacuum stabilisation and cooling is carried out following extrusion, then the finished section of the product is stretched with the aid of stretching devices (7) and the finished section is cut up into pieces of the required size and shape using saws (8), after which the manufacturing holes are sealed. Several extruders positioned in parallel and joined by a common head unit can be used. Extruders with several head units can be used. Virgin polyethylene can be added to the recycled polyethylene.
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