Weathertight protection for the cargo below.

Extreme weather conditions often damage hatch covers, making them prone to leakage, which may lead to damage of the transported goods.

Mareflex MF30 Hatch Cover Tape is a self-adhesive, heavy-duty sealing tape which protects goods against seawater. It is made of a very enduring and flexible material which guarantees protection in all weather conditions.

The tape is composed of a bituminous mass with the appropriate viscidity to ensure a watertight protection, equipped with polypropylene foil on one side and a release liner on the other. It is available in 20 metre rolls, 100 mm and 150 mm wide.

Crew member applying MF30 Hatch Cover Tape along a hatch cover joint — Applying MF30 along a hatch cover joint FIG. A

Regulatory requirements

General regulations regarding hatch covers may be found in 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.

IACS Regulation UR S21 (PDF) IACS Recommendation No 14 (PDF)

From the technical datasheet

Physical properties

Values as published in the MF30 technical datasheet.

2 mm

total thickness

20 m

roll length, both widths

16 months

shelf-life from dispatch

Store in a dry and cool area, in the original packaging, and use within 16 months after goods receipt.

Colour black

Construction Bituminous mass, polypropylene foil face, release liner

Thickness (total) 2 mm

Roll length 20 m

Widths 100 mm and 150 mm

Shelf-life 16 months from date of dispatch by Mareflex, stored in the original box at 21 °C and 50 % relative humidity

Availability · IMPA coded

Two standard sizes, 20 m rolls.

MF30-100 100 mm × 20 m

Rolls in a box 3

Box weight 15 kg

Box size 26 × 26 × 31 cm

IMPA 232454

ISSA 43.003.00

MF30-150 150 mm × 20 m

Rolls in a box 2

Box weight 15 kg

Box size 26 × 26 × 31 cm

IMPA 232455

ISSA 43.003.00

* other dimensions can be available upon request · supplied in carton boxes of 3 rolls (MF30-100) or 2 rolls (MF30-150)

Installation instructions

01 Clean the surface thoroughly before applying and make sure the hatch cover is free of any salt from the sea-spray

02 The surface must be dry before tape application

03 In cold weather, heat the tape with a torch for better adhesive performance: flame on the black surface after removing the release liner, never in fire danger areas

04 Immediately after heating, apply pressure to stick the tape onto the surface before it cools down, to ensure optimum adhesion