Steel
Above the waterlinePre-treatment As above Steel corrodes when exposed to salt and water and for long term performance, it
essential to prepare the surfaces well. Abrasive grit blasting or water blasting is
recommended to a white metal finish (blast standard Sa2
1 ⁄
2 ). Mechanical abrasivediscs can be used, but be careful not to polish the surface or adhesion may be
affected. Use angle grinders to smooth welds or round sharp edges.Enough
marine primer must be applied to protect the steel against water. So apply all therecommended coats to avoid areas of low film thickness, which will lead to
premature breakdown. We recommend a minimum dry film thickness of 225
(microns or micrometers) of primer for long term protection. No. ofProduct nameCoating intervalThinner/Abrasive Comments Coatsat 10C min/maxCleanerPaper3Seajet117or11824 hrs/2 daysThinner E320Thin 1stEpoxy Primercoatby25%1Seajet Universal24 hrs/14 daysThinner U320Primer Undercoat 23Seajet Unythane48 hrs/NoneThinner U400 wet or Topcoatfiner Then 3Seajet117or11824hrs/2 daysThinner U320Thin 1stEpoxy Primercoatby25%1Seajet Universal24 hrs/14 daysThinner U320Primer Undercoat23Seajet Glosskeep24 hrs/NoneThinner U400 wet orTopcoatfiner Or
Paintingnewboatsorbareareasandunpaintedboats
4Seajet117or11818 hrs/7 daysThinner E320 dryEpoxy Primer Below the waterline
Pre-treatment 23Seajet 13212 hrs/NoneThinner P400 wetPolyurethaneor finer Degrease using SEAJET BOATWASH. Rinse with fresh water.Abrasive grit blasting to a white metal finish.
Brush off dust and use lint free tack rags to remove remaining traces of dust. or two component, high performance finish over bare steel Then No. ofProduct nameCoating intervalThinner/Abrasive Comments Coatsat 10C min/maxCleanerPaper4Seajet117or11818hrs/3 daysThinner ENoneThin 1st Epoxy Primercoatby10% 5Seajet0114hrs/7 daysThinner ANoneUnderwaterPrimer Or for touch up areas only 12Seajet Anti-fouling8 hrs/NoneThinner ANoneWhen using Seajet 118, apply a thin coat of Seajet 011 before applying the anti-fouling. Then Topcoat Leave18hoursbeforelaunching.Maximumintervalbeforelaunchingis6months. 44
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