When it comes to repairing deep structural damage, larger cracks or cavities on yachts and boats, the SEA-LINE epoxy filler with fiberglass is the unsurpassed solution. The addition of glass fibers to the high-quality epoxy base creates an extremely robust and high-strength filler that can withstand the highest mechanical stress. For depths and crack bridging: Thanks to its glass fiber reinforced composition, this 2K putty can be applied in very thick layers without sagging. It is specially designed to reliably fill and reinforce deep holes, cavities as well as cracks and breaks in laminate or wood. It is ideal for repairing deep osmosis damage and restoring the original material strength. Universal application safety: As an epoxy filler, this compound can be used safely both above and below the waterline and even on permanently submerged hull parts. It offers excellent adhesion to Allen common boat building materials: GRP laminate, steel, aluminum and wood. Easy to use: The precise 2:1 mixing ratio (by volume) is easy to handle, with the container providing additional space for direct mixing of the components. The long open time of approx. 50 minutes at 20°C gives you enough time to carry out even complex repairs cleanly. After 16 hours the filler is hardened and ready for sanding. For a final, smooth cosmetic surface, it is recommended to rework the fiberglass filler with a finer epoxy filler (e.g. the Universal Epoxy Putty) before applying the primer and antifouling. Trust the strength of fiberglass for lasting repairs.