SynDeck Marine Underlayment and Coating Systems Certifications Quality products for the toughest standards. NAVSEA Qualified, IMO Approved products. NEW: MIL-PRF-32584 image/svg+xml ? Why SynDeck? We formulate products for harsh environment challenges: Water Resistant, Light Weight, Flexible, Durable, Fast Turnover. How To Videos Visit our video section for information on how to properly mix and apply our primers, underlayment’s, sealers, colored epoxies, and other marine coatings. SynDeck News NEW ABS Approvals: A full range of products carry ABS Product Type Approval. You’re covered from bond coat to top coat.