The main purpose of this barrier coat additive is to create a sufficiently thick layer of epoxy resin that is abrasion and moisture resistant and prevents gelcoat blistering. It serves as an effective basis for subsequent surface treatment. It is recommended to apply at least two coats of epoxy resin as an effective moisture barrier. Three coats if you need to sand again. Each additional layer improves the water moisture resistance. For osmosis repairs and protection, a total of six coats with a thickness of at least 0.6 mm should be applied. The first coat without additives, the other five including the 422 barrier filler. This ensures maximum moisture exclusion effectiveness.
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