Jotun Jotamastic 87 Wintergrade

Jotun Jotamastic 87 Wintergrade

Buy Jotun Jotamastic 87 marine primer online UK, for sailing boats and yachts with free delivery to the UK. 

Wintergrade version for application below 10°C and faster curing times in normal conditions.

Jotamastic 87 is the original market leader in epoxy mastic technology. To be applied directly to steel surfaces where good standards of surface preparation (min ST2.0) have been achieved.

Jotamastic 87 gives excellent corrosion protection both in salt and fresh water. Applied at the correct film thickness (150 to 300 microns in a single coat) to properly prepared steel, it is able to prevent corrosion for up to 15 years.

The aluminium range is particularly suited for submerged areas (look in choose colour for Aluminium or Aluminium red-toned). Aluminium flakes within the coatings create an impenetrable barrier to water and increased coating flexibility.

Use the Standard version for application above 10°C and slower curing times giving a longer pot life.

Pack size including hardener is 5 litres  (4.7 litres for the Aluminium or Aluminium red-toned).

Recommended topcoats:

  • Standard: Conseal Touch-Up
  • Premium: Hardtop AX
  • Eco: Hardtop CA
  • Other topcoat options available. Please call us for advice.


Application MethodBrush, roller or high pressure airless spray
Coverage6 to 8 m² per litre
No. of recommended coats3
Dry to re-coat @ 10°C16 hours
Curing time @ 10°C3 days
Pot life @ 10°C2 hours maximum
ThinnerJotun Thinners No. 17 or SML Epoxy Thinner
Water resistanceExcellent
Chemical resistanceGood
Solvent resistanceVery good

GuidesDownload Size
 Brochure3.54 MB
 Mixing by Weight Table53.69 KB
 Data sheet783.88 KB
 Application guide1.02 MB
 Aluminium data sheet761.23 KB
 Aluminium application guide931.93 KB
 Comp. A Safety Sheet1.45 MB
 Comp. B Safety Sheet1.08 MB

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    Jotun Jotamastic 87 Wintergrade