Jotun Jotamastic 87 Marine Surface Tolerant Epoxy Primer

High Build High Solids Surface Tolerant two pack Epoxy Mastic Primer Finish. Ideal for applications when abrasive blast cleaning is not practical.

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Jotun Jotamastic 87 Marine Surface Tolerant Epoxy Primer

Jotun Jotamastic 87 is a high solids high build two pack surface tolerant epoxy primer it is specifically designed for areas where optimum surface preparation is not practical or economic. It provides long lasting protection in environments with high corrosivity.It can be used as a primer, mid coat, finish coat or as a single coat system in atmospheric and immersed environments. The coating is suitable for properly prepared carbon steel and aged coating surfaces. It can be applied at sub zero temperatures. Jotamastic 87 is recommended for marine and offshore environments including hulls, splash zones, refineries, power plants, bridges, mining equipment and general structural steel. It is certified to have low flame spread and is prequalified in many Norsok systems. Winter grade is available for sub zero applications. It can be overcoated in atmospheric environments with the full range of Hardtop two pack polyurethane finishes. Available in a range of stock colours in 5lt and 20lt packs for free delivery throughout the UK.

  • Excellent Mechanical and Chemical Resistance. Recommended for Underwater Protection on Steel Boats and Offshore Structures. No Abrasive Blast Cleaning required.
  • High Solids High Build Epoxy for Marine and Industrial Environments. Adheres to Mechanicall prepared Steel and aged coatings. 300 mics in a single coat. Norsok approved.Suitable above and below the waterline.
  • Easy to Apply. Stock colours Aluminium, White, Grey, Black and Red. High coverage rates. Overcoat with a range of Hardtop Polyurethane paints for long term Colour & Protection. Free Next Day Delivery.

Technical Credentials.

Surface Tolerant two pack Epoxy Mastic.

High Volume Solids 82%.

Semigloss Finish

Dry Film Thickness 150-300 microns.

Theoretical Coverage 5.5 m2/lt (150 mics.)

Surface Dry 7 hrs @ 23c.

Overcoat 10hrs @ 23c.

Pot Life 2 hrs @ 23c.

Apply by Airless Spray, Roller or Brush.

Thinner No. 17.

Lower VOCs 210 g/lt.

Surface Preparation.

Carbon Steel: Minimum St 2 , Recommended Abrasive blast clean to Sa 2 (ISO 8501-1)

Coated Surfaces: Ensure the existing coat is intact, compatible, dry and free from oil grease and other contaminants.

Download the technical data sheet for more information.

Jotamastic 87 is a high solids, high build, two pack surface tolerant epoxy mastic with excellent abrasion and corrosion resistance. The aluminium version is recommended as a first coat to provide extra corrosion and water resistance. It can be applied by Airless spray, brush or Roller. Jotamastic 87 Surface Tolerant Epoxy Primer is designed for use on steel when abrasive blast cleaning may not be possible. Jotamastic 87 Primer may be used above and below the water line, the winter grade version can be applied at sub zero temperatures. It is resistant to continuous operating temps of 120c and in immersed seawater at 50c.

Jotamastic 87 is a two pack epoxy semigloss suitable for use in atmospheric and immersed environments as a primer or intermediate coat in a multicoat system. It can be applied direct to carbon steel, stainless steel, galvanised steel, aluminium and over previously coated surfaces. Jotamastic 87 is recommended for marine and offshore environments, new construction,  marine hulls, topside and superstructures. It can be applied up to 300 microns in a single coat by airless spray, two coats may be required to achieve the recommended DFT by roller.

The typical recommended specification range for the film thickness is 150 – 300 μm for dry film thickness, 180 – 365 μm for wet film thickness and 5.5 – 2.7 m²/l for the theoretical spreading rate.

To secure the lasting adhesion to the subsequent product all surfaces must be clean, dry and free from any contamination. For a carbon steel and shop primed steel surface it is recommended that the surface is blast cleaned which makes it free of all visible oil, grease, dirt, dust, rust or any existing coatings. For coated surfaces it is recommended that the surface is clean, dry and doesn’t have any damaged coatings.

Depending on the substrate temperature you are applying the coating at will depend on how fast the drying and curing time will be. The fastest the product will dry is at 40°C which will result in the product being touch dry in 2 hours, walk-on-dry in 4 hours, dry to over coat in 4 hours and dried/cured for service in 2 days.

Jotsamstic 87 is also able to resist a continuous heat of up to 120°C in dry and atmospheric environments and a continuous heat of up to 50°C as well as a peak heat of 60°C in immersed sea water environments.