3M Marine Grade Silicone Sealant Clear 304 mL (10.3 fl oz) | Above Waterline Interior/Exterior Sealing

Professional-Grade Marine Sealing

This 3M Marine Grade Silicone Sealant is formulated for superior performance in challenging marine environments. Its high-temperature resistance and non-yellowing, flexible finish ensure a durable, long-lasting seal that stands up to constant exposure to water and UV rays. Unlike generic sealants, it adheres strongly to a wide array of surfaces common in boat building and repair, including metal, fiberglass, glass, and treated woods. The moisture-curing action creates a reliable barrier, preventing leaks and protecting against corrosion. Imported directly from authorized US retailers, this product guarantees authenticity and professional-grade quality for your critical marine projects.

Ideal For Boats & Coastal Structures

This sealant is perfect for sealing joints, seams, and gaps above the waterline on boats, yachts, RVs, and coastal structures. It's best suited for applications requiring a flexible, durable, and weather-resistant seal that won't degrade in harsh marine conditions. Those needing a sealant for underwater applications or for materials not listed (like oily woods or certain plastics) should consider specialized products. For basic home caulking, less robust options may suffice, but for demanding marine use, this 3M product offers unmatched reliability.