Step 1 (option 1)
SA 2 Blasting
We recommend an SA 2 sandblasting treatment for your surface to thoroughly remove the old antifouling coating, however sanding would be an alternative treatment. If you choose to SA 2 sandblast, then sanding is no longer needed.
Step 1 (option 2)
Because Neosil is a beautiful high gloss coating, it is important to keep the surface of your boat as flat and smooth as possible to ensure the most beautiful final result. For this reason we recommend that you use an eccentric sander to prevent and small hight differences to occur in your surface during sanding. Please use P80 grit.
Degrease the surface
You can use Neocleaner or another degreaser like Solvatane or Ammoniac. Make sure to use enough of your degreaser, hit every spot well and change your cloth often.
TEST TO DEFINE THE UNDERLYING PRIMER LAYER
Take a cloth and dab it in Solvatane. Softly rub the cloth against the old primer surface.
Outcome 1: Does it dissolve? This means it is a one-component primer and it will need to be removed. Remove the old primer layer by repeating Step 1 and Step 2. Then continue applying Neosilco and Neoguard in step 4 and step 5.
Outcome 2: Does it not dissolve? This means it a two component primer and you may leave it on.
If this old two-component primer layer has a thickness of 400 - 600 microns, then you may skip "Step 5 Neoguard” in this surface treatment plan.
Neosilco is the first primer layer that will protect your boat surface from corrosion. It also ensures an excellent adhesion of the second primer Neoguard. Open the container and stir the paint only shortly. Neosilco can be easily recognised by its Oxide Red colour.
If you apply Neosilco by brush or roller, make sure to dilute Neosilco by 0-5% using Neothinner Roll.
If you apply Neosilco by airless spray, make sure to dilute Neosilco by 5-10% using Neothinner Spray.
It is important to make sure Neosilco is applied in an even layer of 100 micron when the paint is wet. The layer thickness may be measured with a "wet film comb”. After drying this will result in a dry film layer of 70 microns. Make sure to give Neosilco a curing (drying) time of 6 to 8 hours before applying the next layer of Neoguard.
Neoguard is the second primer, that will waterproof the coating system. Neoguard can be easily recognised by its black colour.
It is important that you make sure the wet layer thickness of Neoguard is right. If the layer is too thick there will be a higher risk of blister forming underneath the paint.
If you apply Neoguard by brush or roller, make sure to dilute Neoguard by 0-5% using Neothinner Roll.
If you apply Neoguard by airless spray, make sure to dilute Neoguard by 5-10% using Neothinner Spray.
Apply Neoguard in three layers. The second and third layer may be applied while the layer underneath is still wet.
One layer of Neoguard may have a wet film thickness of 130 microns. Apply 3 of these layers on top of each other leaving approximately 15 min of drying time between each layer. The total wet film thickness should be approximately 390 microns. The layer thickness may be measured with a "wet film comb”. After drying this will result in a dry film layer of 240 microns.
Make sure to dry Neoguard overnight before applying the final layer of Neosil.
Neosil is a two component coating. You will have a “Component A” and a smaller “Component B” container. Open both containers and add component B to the container of component A. Make sure you always mix the entirety of the two containers. The ratio of component A and B is very sensitive, therefore mixing a part of the container might result in undesired results.
By using an electric power mixer, mix the two components together for about 5 minutes. Let the mixture rest for 45 minutes (induction time). After this Neosil has a pot life of 4 hours. Using an Anza roller, or other roller that is suitable for two component coatings, roll the neosil coating at a wet film thickness of 140 microns. The layer thickness may be measured with a "wet film comb”.
If you choose to apply Neosil by airless spray, make sure you do not use a paint spray with a beaker but a pump, adjust the nozzle to crease a good mist. For more details please check the TDS. If you need to dilute Neosil for airless spray, make sure you dilute no more than 5% - 10% using Neosil Reducer. Do NOT use thinner, solvatane or other materials not approved by DDC.
NEOSIL must cure more than 72h, at approximately 18°c., before the vessel is launched into the water, to obtain his optimal characteristics. Because the coating is still vulnerable for mechanical damages, it is advised to have the full system cure for 7 days before allowing the ship to water. When Neosil is applied using airless spray the final layer of Neosil Coating should dry at least 36 hours, at 18 °c.