Extreme weather conditions often damage hatch covers causing leakage which can lead to the damage of products being transported Keep out moisture, weather, sound and fumes by ensuring a tight hatch seal. HaCo Blueliner hatch cover tape is design by specialists with 20 years experience, to seal out the elements on hatch cover rims. HaCo has an extraordinary strength, adhesion and is extremely flexible compared to others in the market. It can be easily recognized by his blue top layer of modified HdPE A material which gives the highest protection under extreme conditions. Regulations regarding hatch covers have evolved since the investigation following the loss of the MV Derbyshire. The Association of Classification Societies increased this strength standard by creating its Unified Requirement S21 in 1998.