MK 442

MK 442 is a high-quality one-component polyurethane sealant.

Sealant of joints not subject to expansion, car parking, cement, stone, porous and non-porous materials such as: polycarbonate, PS, PU, PVC and various types of plastic, ceramic tiles, copper, zinc, aluminum, stainless steel coatings, wood and glass.

  • Seals and joins different parts in the industry. Used in the automotive industry, containers, caravans, railway carriages, boats, ventilation and air conditioning systems, gluing of mirrors, glass and for various applications in the nautical sector.
  • Bonding for structures, ceilings and flooring of buses, trucks and trains.
  • Good adhesion on different surfaces, even mixed, in many conditions even without the use of the primer.
  • High modulus – very elastic.
  • Water-solvent based over paintable.
  • It does not discolour – Applicable on damp or wet surfaces.
  • Suitable for wet on wet applications.
  • Good aging properties.
  • Usable as anti-vibration and soundproofing.
  • No shrinkage.

 


Attachment

TDS MK 442_ENG

Description

PROPERTIES VALUES
CHEMICAL NATURE Polyurethane
COLOUR Black
APPEARANCE Thixotropic paste
VISCOSITY  > 200.000 mPa.s
DENSITY 1,18 ± 0.05 g/ml
HARDNESS   (DIN 53505) 35 Shore A
MODULUS AT BREAK  (DIN 53504) 0.7 MPa
ELONGATION AT BREAK (DIN 53504) > 700 %
TENSILE STRENGHT  (DIN 50504) > 1,10 MPa
SKIN TIME 90 – 120 min. (23°C & 50 % R.H.)
CURE TIME 3,0 mm / day (23°C & 50 % R.H.)
TEMPERATURE RESISTANCE – 40 / +70°C
APPLICATION TEMPERATURE +5 / +40°C
ACCESSIBILITY 6 – 12 h
RESISTANCE TO DILUTED ACIDS AND BASES MEDIUM
RESISTANCE TO SOLVENTS AND HYDROCARBONS MEDIUM
COMPLIANCE CTBA Adhesion Test NFB 54-008

Additional information

Specific work-setting (component)

DYNAMIC bonding-line > 100 cm (IMPACTS + VIBRATIONS + TORSIONS), Operating Temperature <0 ° C, STATIC bonding-line <100 cm (LIGHT HANDLING)

Substrates (suitable adherings match))

GLASS # METALS and / or ALLOYS (Al – Ti – Ni – Cr – Fe), HIGH ENERGY SURFACE THERMO-PLASTIC POLYMERS # HIGH ENERGY SURFACE THERMO-PLASTIC POLYMERS, HIGH ENERGY SURFACE THERMO-PLASTIC POLYMERS # METALS and / or ALLOYS (Cu / Zn – Fe – Pb), METALS and / or ALLOYS (Al – Ti – Ni – Cr – Fe) # HIGH ENERGY SURFACE THERMO-PLASTIC POLYMERS, METALS and / or ALLOYS (Al – Ti – Ni – Cr – Fe) # METALS and / or ALLOYS (Al – Ti – Ni – Cr – Fe), METALS and / or ALLOYS (Cu / Zn – Fe – Pb) # METALS and / or ALLOYS (Al – Ti – Ni – Cr – Fe), METALS and / or ALLOYS (Cu / Zn – Fe – Pb) # METALS and / or ALLOYS (Cu / Zn – Fe – Pb), SEMI-FINISHED BUILDINGS # METALS and / or ALLOYS (Cu / Zn – Fe – Pb), SEMI-FINISHED BUILDINGS # SEMI-FINISHED BUILDINGS, WOOD # GLASS REINFORCED FIBER COMPOSITES, WOOD # WOOD

Adhesive Working Time

10 ÷ 30 MINUTES

Adhesive Fixture Time

> 90 MINUTES, 6 h ÷ 12 h

component sector/process

AUTOMOTIVE – TRUCK – BUS – AGRICULTURAL, FORESTRY MACHINES, INDUSTRIAL COMPONENTS, NAUTICAL & NAVAL, TRAINS

Type of failure mode (after joint stress)

ADHESIVE (bonding failure between adhesive and adhering: no residue on substrates)

Type of joint (application mode)

BEAD – OVERLAP

Whatsapp Contact Adhesive