... No explosion risk,with safty5.Long term service. ship dock fender 1/Product specifications of Polyurethane foam ... for the places of the docks , boatyard and ship boards from place to place . Foam Filled ... absorb large amount of energy.(4when berthing, the ship is almost at a certain angle, the polyurethane ... .(5floating on the water surface, even the ship fluctuate and sway resulting from ebb and flow ...