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Hatch Cover Tape

The function of hatch cover tapes is to protect the metal hatch covers on carriage ships
against leakage of water into the carriage area.

mf 30 hatch cover dark

General description

Extreme weather conditions often damage hatch covers making them prone to leakage, which may lead to damage of the transported goods.
Mareflex MF 30 Hatch Cover Tape is a self-adhesive, heavy duty sealing tape which protects goods against seawater. MF 30 Tape is made of a very enduring and flexible material which guarantees protection in all weather conditions.

mf 30 hatch instalation

Technical specification

Mareflex MF 30 is composed of a bituminous mass which has the appropriate viscidity in order to 
ensure a watertight protection. It is equipped with polypropylene foil from one side and a release liner
from the other. The tape is available in 20 meters rolls, 100mm and 150mm wide.

Regulatory requirements

General regulations regarding Hatch Covers may be found in the Regulation UR S21, point 4.2 issued by the International Association of Classification Societies (IACS).

IACS Recommendation No 14 “Hatch cover securing and tightness” provides details regarding Hatch Cover sealings:

2.2.2 Weathertight sealings are to be obtained by a continuous gasket of relatively soft elastic material compressed to achieve the necessary weathertightness. Similar sealing is to be arranged between cross-joint elements. Where fitted, compression flat bars or angles are to be well rounded where in contact with the gasket and are to be made of a corrosion-resistant material.

2.2.3 The gasket material is to be of a quality suitable for all environmental conditions likely to be experienced by the ship, and is to be compatible with the cargoes carried. The material and form of gasket selected is to be considered in conjunction with the type of cover, the securing arrangement and the expected relative movement between cover and ship structure. The gasket is to be effectively secured to the cover.

Physical properties

Thickness (total):
2 mm
Shelf life
16 months from date of dispatch by Mareflex, when stored in the original box at 21°C and 50% relative humidity.


Product code
Single roll size
Rolls in a box
Box weight
Box size
100mm x 20m
26 x 26 x 31cm
150mm x 20m
26 x 26 x 31cm

* other dimensions can be available upon request

Installation instructions

  • Before applying the Hatch Cover Tape clean the surface thoroughly and make sure that the hatch cover is free of any salt from the sea-spray.
  • The surface must be dry before tape application.
  • In cold weather conditions use a torch to heat up the tape to achieve a better adhesive performance.
    The flame should be applied to the black surface after removing the release liner. Be careful not to use a torch in a fire danger areas.
  • Immediately after heating apply pressure to stick the tape onto the surface before the tape cools down, to ensure optimum adhesion.

Maintenance and storing

Material should be stored in a dry and cool area and used within 16 months after goods receipt. It is recommended to store the rolls in the original packaging.

Mareflex provides the tapes in cartoon boxes containing 3 rolls of MF30-100 or 2 rolls of MF30-150.