Gelcoat: What It Is, How It’s Used, and How to Repair It Gelcoat is the outermost protective and cosmetic layer used on fiberglass parts. Understanding how gelcoat works — and how to apply or repair it correctly — is critical to achieving long-lasting performance and professional results. What Is Gelcoat? Gelcoat is a pigmented polyester or vinyl ester resin applied to the surface of fiberglass parts. It creates a smooth, high-gloss finish while protecting the underlying laminate from wat...
Open Molding & Lamination Technical Support Open molding and hand lay-up remain some of the most widely used fiberglass manufacturing methods in marine, industrial, and composite fabrication. Successful lamination depends on selecting the correct laminating resin and understanding how resin formulation, processing behavior, and cure characteristics affect the finished composite part. What Are Laminating Resins? Laminating resins are polyes...
Hand Laminating & Spray-Up Technical Support Hand laminating and spray-up are two of the most common open molding processes used in fiberglass fabrication. While both methods rely on similar materials, success depends on understanding the differences in application technique, resin behavior, and process control. At Fiberglass Florida, we provide technical support to help fabricators, repair yards, and builders choose the right laminating method and materials for their project — a...
Awlgrip 545 Epoxy Primer Guide 545 Epoxy Primer is the industry standard undercoat primer used in Awlgrip coating systems. It seals surfacing primers and prepares substrates for Awlgrip or Awlcraft topcoats while providing excellent adhesion and corrosion protection. View Full Awlgrip Application Guide Shop Awlgrip Primers Product Overview Key Features Outstanding adhesion to fiberglass, steel, aluminum and wood Corrosion resistant epoxy primer Used above or...
Boat Restoration Technical Support Guide Last updated: February 2026 Boat restoration is the process of repairing, rebuilding, and refinishing fiberglass boats to restore structural integrity, appearance, and long-term performance. This technical support guide serves as a master reference for understanding materials, repair methods, and best practices used in modern fiberglass boat restoration. This page is designed as a living knowledge base. Each section below will continue ...
Mirka Marine Surface Finishing Systems From heavy sanding to high-gloss finishing — complete systems for fiberglass, gelcoat, and marine coatings. About Mirka Mirka Ltd is a global leader in abrasives technology, delivering complete sanding and polishing systems designed to improve surface quality, efficiency, and profitability. ISO 9001 – Quality Assurance ISO 14001 – Environmental Management OHSAS 18001 – Occupational Safety Perfect Surfac...
Polyester Resin Guide: How to Use It, Types, and What You Need Short Answer Polyester resin is the most widely used material for fiberglass repair, boat building, and composite construction. It is affordable, fast-curing, and ideal for laminating fiberglass cloth, mat, and structural parts. --- What is Polyester Resin? Polyester resin is a thermosetting resin used in fiberglass applications to create strong, durable composite structures. It is activated using MEKP catalyst and cures throug...
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