Sea-Line Epoxy Lightprimer 5:1 – Two-Component Epoxy Primer for Strong Adhesion & Osmosis Protection

Sea-Line Epoxy Lightprimer 5:1 is a versatile two-component marine primer engineered to enhance coating adhesion and provide long-lasting protection against osmosis on boat hulls. This thin-coat epoxy primer forms a tough intermediate layer that seals fiberglass laminates, wood, steel, and aluminum surfaces against moisture ingress while ensuring excellent bonding for subsequent paint systems. Epoxy Lightprimer 5:1 applies easily by brush, roller, or spray gun, exhibiting good flow that yields a smooth, even film without dripping on vertical areas. Its precise 5:1 mixing ratio is simple to achieve using the supplied measuring cup and the ample space in the cans for combining components. Once mixed, the primer offers a workable pot life of about 2 hours (at 20°C) and becomes touch-dry in 3–4 hours. Recoating can be done after 4 hours (up to 5 days) without sanding, as long as the previous coat is within the recommended recoat window. When applied in multiple coats (up to four), Epoxy Lightprimer builds a reliable anti-osmotic barrier that safeguards the hull from blistering and water intrusion over time.

• Recommended Uses: Use Sea-Line Epoxy Lightprimer 5:1 as a base primer on fiberglass (GRP) hulls to prevent osmotic blistering and to reinforce gelcoat integrity below the waterline. It also serves as an ideal intercoat primer when repainting or repairing – for example, between an old epoxy substrate and a new polyurethane topcoat or antifouling layer – effectively increasing the adhesion between different coating systems. Additionally, Epoxy Lightprimer 5:1 is suitable for priming wooden boats and metal surfaces (steel or aluminum), providing corrosion resistance and a sealed, stable surface for further painting.
• Available Variants: Sea-Line Epoxy Lightprimer 5:1 comes in white or grey kits that include epoxy resin and hardener. Standard package sizes are 0.75 L and 3 L sets, allowing users to choose a smaller kit for minor spot repairs or a larger volume for complete hull priming. (For very large projects, industrial packs up to 15 L are noted in technical datasheets.) Each kit includes the components and even a mixing cup with a marked scale for easy and accurate dosing of the resin and hardener.

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