Topcoats

SEAJET topcoats are designed to protect your boat against the elements and keep her looking like new. Where conventional alkyd paints can soon fade and need repainting regularly, SEAJET topcoats provide a longer term solution. The main benefit is that you need to paint less frequently than when using conventional paints.
This is due to:
  • Improved gloss retention
  • Improved colour retention
  • Improved resistance to UV light
  • A tougher, harder surface which is more resistant to knocks and scratches

Comparison for Northern Europe Conventional Topcoats Repainting is required after 1-2 years SEAJET 120 UV VARNISH - Repainting necessary after 2-3 years.SEAJET 122 BRILLIANCE TOPCOAT - Repainting is required after 3-5 years (or longer). SEAJET 132 POLYURETHANE TOPCOAT - Repainting is required after 5-10 years. Note: Repainting interval depends upon the ambient sunlight, which varies around the world. For the Caribbean and Mediterranean, reduce the above figures by half.
So how do we tackle the painting work? Firstly, you'll need to wear the right clothing. Painting can be a messy job, so you'll need old clothes or a pair of overalls; rubber gloves; and a hat. We also recommend that you wear a pair of safety glasses.
TIP: Don't paint while wearing a woolly sweater or hat - as the fibres will get onto the paintwork.
You'll also need a few basic tools, including a scraper for scraping off any loose paint; some wet or dry paper and sanding blocks to key the surface by sanding down; and brushes or a roller for putting your new paint on. And don't forget some masking tape to mask off the waterline.
Surface preparation Preparation is the key. Good surface preparation will result in a beautiful finish. So take your time.
Loose paint should be removed by scraping back to a sound substrate. Larger areas can be dealt with by slurry blasting or mechanical sanding. Chemical paint strippers should never be used on glass fibre, as they will quickly destroy the protective gel coat. Use SEAJET Thinner to remove any grease spots. Then wash and degrease with cleaner. 
Sanding is required to obtain a smooth surface and key the surface. Surfaces to be painted must be clean, dry and free of oil or grease. Existing paints need to be sanded to remove small lumps and 'blebs' in the paintwork. Flatten back with P180-P280 abrasive paper. Finally, brush off dust and use lint free tack rags to remove remaining traces of dust. 
Preparation can vary depending on the surface to be coated, so follow our painting specification for specific details of preparation.  



Priming, Filling and UndercoatingBare surfaces must first be primed with our recommended priming scheme. This can be different for different surfaces, so please consult our paint specifications for primer recommendations. 
Fill and fair between coats with an epoxy profiling filler to make good any undulations or damage. We recommend using SEAJET filler for small patch repairs. Consult professionals for larger repairs. Apply the filler with a spatula, making sure the spatula used is twice as wide as the hole to be filled. This reduces low spots. You can sand after only 2 hours, using 280-320 grade abrasive sand paper. Repeat if required for a perfectly smooth surface. You can overcoat the filler with any SEAJET primer or topcoat.
Seajet topcoats can be applied directly to existing paint or fibre glass. First rubdown to remove any imperfections using 280 then 320 abrasive paper. However to obtain a uniform and consistent colour, an undercoat is recommended. This also acts to seal the filler and prevents moisture being absorbed. SEAJET 012 Universal Primer Undercoat should be applied and then flattened back using 320 grade abrasive paper.
TIPS: Two coats of undercoat will give an even better finish. Stir thoroughly before use with a flat blade or stirring stick. Remove sanding dust with a brushand then a lint free tack rag. 
Applying the Finish CoatWhereas a typical conventional paint will last for 1-2 years before repainting, our high performance topcoats will keep your boat looking like new for longer.
For best results, apply using a short haired roller and layoff with a long haired, high quality, soft bristled brush. Use a criss-cross pattern and always finish the last stroke in the same direction. 
Flatten back between coats using 320-400 abrasive paper. Two or preferably three coats will give a long lasting finish.
When the overcoating time is exceeded you have to abrade before applying the next coat (2-component product). To get a glass-like finish we recommend abrading (P320-P400) between the layers.
TIP: Make sure you pick a dry day. Preferably paint in the morning to avoid evening condensation settling on the surface. You can dampen the ground underneath the boat to avoid dust rising.