Fiberglass Repair

From stress cracks to collision damage, Donlin Marine restores your hull to factory condition. Our technicians bring precision craftsmanship and color-matching expertise to every repair, so you'd never know anything happened.

Fiberglass damage, whether it's a hairline stress crack, a deep gouge, or impact damage from a dock or debris, needs to be addressed properly before it becomes a much bigger problem. Water intrusion into exposed fiberglass leads to delamination, structural weakening, and costly repairs down the road. At Donlin Marine, we fix it right the first time.

Our technicians are experienced in all types of fiberglass and gelcoat repair, from minor cosmetic work to structural restoration. We use professional-grade materials and meticulous color-matching techniques to blend repairs seamlessly with your boat's original finish. Whether your boat just needs a touch-up or took a serious hit, we'll bring it back looking, and performing, like it should.

Structural Repairs

From stress fractures to impact damage, we restore hull integrity before cosmetic finishing begins.

Gelcoat Color Matching

Precise color matching ensures repairs blend invisibly with your boat's original factory finish.

Water Damage Restoration

We identify and eliminate moisture intrusion to prevent delamination and long-term structural issues.

All Hull Types

Fiberglass, gelcoat, and composite hulls across all boat styles — fishing, pontoon, ski, and cruiser.

How It Works

Our Process

01

We inspect the full scope of damage, including subsurface moisture testing, to understand exactly what needs to be addressed before any work begins.

02

Any structural or subsurface damage is corrected first. We grind back to clean material, rebuild with fiberglass laminate, and ensure full bond integrity before moving to the surface.

03

Once structure is solid, we apply and shape gelcoat, blend layers to the surrounding surface, and wet-sand progressively to a smooth, seamless finish.

04

We dial in the color match to your hull's original tone, then compound and polish the repaired area to a factory-grade shine.

Full Service Scope

What's
Included

Every fiberglass repair at Donlin Marine covers the full scope, surface and structure.

Schedule Service →
  • Damage assessment & moisture testing
  • Color matching to factory specification
  • Grinding & material removal to clean substrate
  • Wet sanding & surface blending
  • Structural fiberglass laminate rebuild (if needed)
  • Compounding & polishing
  • Core repair or replacement (if delaminated)
  • Final inspection & quality check
  • Fairing & surface preparation
  • Corrosion barrier treatment (where applicable)
  • Gelcoat application & layering
  • Full wash & detail of repaired area
Authorized Brands

What We Fix

No two repairs are the same. Here's a breakdown of the most common fiberglass work we handle at Donlin Marine.

Cosmetic & Gelcoat

Stress cracks, scratches, rub rail scuffs, and oxidation damage repaired and refinished to match your hull's original color and sheen.

Impact & Collision Damage

Dock strikes, rock hits, and trailer damage — we restore hull shape and structural integrity, then finish to factory spec. / Label: Holes · Dents · Fractures

Water Intrusion & Delamination

Moisture trapped inside the hull causes serious long-term damage. We identify affected areas, dry, repair, and seal to stop the problem at its source. / Label: Delamination · Blistering · Core Damage

Submit Your Service Request

Let's Get Your Hull Looking Right Body: Bring your boat into Donlin Marine in Pickstown, SD and we'll assess the damage and walk you through exactly what it'll take to make it right. Button 1: Call Us Today Button 2: Send a Message