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sealine lightweight epoxy filler 1:1 white 3.75 l

Achieve flawless surface repairs with Sea-Line® Lightweight Epoxy Filler, designed for efficiency and ease of application. This 1:1 mixing ratio epoxy filler provides a strong, durable finish while maintaining a low own weight, making it the perfect choice for large-area applications.

Use SL-12289 for hardener

Key Features:

  • Lightweight Formula – Ideal for leveling large surfaces with minimal added weight.
  • Thick Layer Application – Optimized specific gravity prevents defects and ensures a smooth, uniform finish.
  • Superior Damage Repair – Effectively fixes cracks, scratches, and osmosis-related damage, restoring integrity.
  •  Extended Pot Life – 50-minute working time at 20°C, allowing precise application.
  • Sanding Readiness – Hardens within 20 hours at 20°C for professional-quality finishing.
  • Ideal Mixing Ratios – 1:1 by volume / 100:100 by weight for consistent performance.
  • Versatile Layering Compatibility:
  • Activator included – Comes in precision-filled cans with space for mixing Base (A) and Hardener (B).
  • First Layer: Epoxy primers, Sea-Line® 2K paints.
  •  Second Layer: Epoxy primers, 1K universal primer, polyurethane paint, antifoulings.


Perfect for boat construction, marine repairs, and large-scale surface restoration, this high-performance epoxy filler delivers reliability and professional-grade results.