Jotamastic 90 offers the longest lifetime in any environment. It has exceptional corrosion resistance, is fast drying - greatly improving efficiency, and is designed to be safely applied from 100 to 300 microns in a single coat over a wide temperature and humidity range.
Jotamastic 90 is surface tolerant and can be applied on surfaces that appear dry but where moisture remains and flash rusting has begun. It is ideal for use when blast cleaning is not possible.
Due to the extensive colour range it can be colour matched with the topcoat improving coverage. It can also be used as finished coat in areas with low UV exposure or where colour retention is not the primary focus.
Note: The pack size (including hardener) is 5 litres and 20 litres nominal as the exact quantity of paint is colour dependent (the quantity of tint varies with each colour).
Use the Wintergrade version for application below 10°C and faster curing times in normal conditions.
Use the AL (Aluminium flake) version for increased coating flexibility, strength and an impenetrable barrier to water (only available in aluminium colour).
Recommended topcoats (above the waterline):
Standard: Conseal Touch-Up
Premium: Hardtop AX
Eco: Hardtop CA
Other topcoat options available. Please call us for advice.
| Feature | Details |
|---|---|
| Water Resistance | Excellent |
| Thinner | Jotun Thinners No. 17 or SML Epoxy Thinner |
| Solvent Resistance | Good |
| Pot life @ 23°C | 2 hours maximum |
| No. of recommended coats | 3 x below waterline, 2 above waterline |
| Dry to re-coat @ 23°C | 3 hours |
| Curing time @ 23°C | 7 days |
| Coverage | 6 to 8 m² per litre |
| Chemical Resistance | Very Good |
| Application Method | Brush, Roller or Airless Spray |
Sally Tooze at Willow Boats uses Jotamastic 90.
"We use an airless sprayer to apply Jotamastic 90. Thinned by 10% pretty much all year. We like the process as we are able to apply a reasonably high build (80 microns dft) per coat. We're down to 2 primer coats at this rate which sits well within ISO 12944 guidelines for protection in environment c3".
"The Jotamastic 90 sands well with 120 grade discs leaving us prepped and primed ; 2 boats at a time, inside 1 week. This leaves us plenty of time for the pretty stuff!"
Sally Tooze - August 2020
Thinners No. 17 is the solvent base for Jotun's Jotamastic and Penguard range. Available in 5L & 20L sizes
A two-pack glossy polyurethane topcoat with excellent gloss and colour retention. Suitable for brush/roll, however best results will be achieved from a spray application. Hardtop AX has good chemical resistance and can be used in aggressive atmospheric environments.
Jotun Pioner Topcoat is a single pack, semi-gloss, acrylic topcoat which is suitable for use both above and below the waterline.
Penguard Clear Sealer is a transparent two-pack epoxy sealer with excellent waterproofing qualities.
Thermobonded and solvent resistant for reduced fibre shedding. Available in various lengths and pack sizes. Ideal uses - Antifouling, single & 2 pack Primers.
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