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Jotamastic 90 10L-C

Epoxy Primer · Paint & Coating Systems

Class-certified type (DNV register) · technical data sheet not yet verified

Jotun paint and coating systems. Jotun is one of the world's largest manufacturers of marine coatings, with a market share of roughly 25 per cent. The product lines cover epoxy mastic primers (Jotamastic), solvent-free high-build topcoats (Marathon IQ2), high-molecular-weight epoxy primers (Penguard) and modern antifouling systems (SeaQuantum, SeaForce).

Specifications

Technical data.

Pack size10L
Inspection

Inspector Detail

Common issues

  • Over-thinning reducing dry film thickness below the specified value
  • Application outside the manufacturer's temperature/humidity/dew-point window, causing poor cure or blistering
  • Insufficient surface preparation leading to early adhesion failure
  • Exceeding the maximum recoat window, causing intercoat delamination
  • Incorrect mixing ratio of base and curing agent

Inspection checklist

  • Check that ambient conditions (steel temperature, air temperature, relative humidity, dew point margin) are logged during application
  • Verify the surface preparation standard achieved before coating (typically a near-white/blast-cleaned standard for this type of primer, confirm the exact grade required by the specification)
  • Check wet film thickness during application and dry film thickness after cure against the specification
  • Confirm batch numbers and mixing ratio are recorded
  • Visual inspection for holidays, pinholes or sagging after cure

Service intervals

Minimum/maximum recoat windowtypically a few hours minimum to several days maximum depending on temperature - confirm against the current technical data sheet, and abrade the surface if the maximum is exceeded
Pot life after mixingtypically well under a normal working shift at ambient temperature - confirm against the technical data sheet and discard once exceeded
Shelf life of unopened componentsper the manufacturer's certificate - check the production/batch date before use

Critical spares

  • Matching curing agent (Part B) from the same system as the base component
  • Compatible thinner specified for this product - do not substitute a generic solvent
  • Recoat-compatible topcoat or tie-coat from the same coating system
  • Spray tips, brushes and rollers rated for solvent-based epoxy application

Safety

  • Solvent vapor buildup in enclosed tanks - a gas-free certificate and forced ventilation are required before and during application
  • Flammability of solvent-containing coatings - no hot work or ignition sources nearby
  • Skin and eye contact with epoxy components can cause sensitization - use the PPE specified on the safety data sheet
  • Confined space entry procedures apply for tank coating work

Class survey

Ballast tank and similar coating condition is assessed by class under the IMO Performance Standard for Protective Coatings (PSPC) framework - coating condition is graded and the extent of breakdown or rusting affects survey scope and interval. This is a coating product, not a piece of machinery, so wear-limit and running-hour fields have been left out as not meaningful here.

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