Sailboats USA 🇺🇸 🇨🇦

Gelcoat Suppliers

• TotalBoat Gelcoat — excellent DIY products; color-matched gelcoat paste, spray, and topside paint; good technical support
• Jamestown Distributors — Gelcoat — large selection; competitive prices; excellent tutorial library on their website
• Interlux — topside finishes, primers, and bottom paint; Perfection and Toplac topside systems
• Pettit Paint — Easypoxy and Protect topside systems; antifouling
• System Three Resins — gelcoat primers and barrier coats; excellent technical documents on their website
• Fibre Glast — gelcoat, tooling gelcoat, cosmetic gelcoat; good bulk pricing

Gelcoat Color Matching

• Request an original gelcoat sample chip from your boat manufacturer if possible — Catalina, Hunter, and Pearson maintained color records for decades
• Catalina boats: Catalina Direct stocks factory-matched gelcoat for most Catalina models
• Gelcoat yellows and chalks over time; even a perfect color match will look different on a 20-year-old hull — feather the repair edges for the best visual result
• TotalBoat and Jamestown Distributors offer custom color matching services

Gelcoat Repair Process (DIY)

• Step 1: Grind the damaged area to clean material; feather edges with 80-grit
• Step 2: Build up with structural laminate if there is any depth (use polyester or vinylester resin + woven cloth)
• Step 3: Mix gelcoat to proper thickness; add MEKP catalyst per instructions (2–3% by weight)
• Step 4: Apply gelcoat slightly proud of the surface; cover with PVA film or wax paper to exclude air (gelcoat needs to cure without air contact)
• Step 5: After full cure (2–4 hrs), sand progressively: 220 → 400 → 600 → 1000 → 2000 grit
• Step 6: Compound and polish to match surrounding area

Polyester Resin

• Cost: ~$30–$50/gallon — lowest cost of the three
• Water resistance: Poor — absorbs moisture; causes blistering over time below the waterline
• Strength: Adequate for cosmetic repairs; not for structural work
• Adhesion: Bonds well to existing polyester and vinylester; will NOT bond reliably to cured epoxy
• Cure: Air-inhibited — surface stays tacky until covered with wax or PVA film
• Use for: Small cosmetic repairs and gelcoat work above the waterline; non-structural laminate repair where you will apply gelcoat on top
• Do NOT use for: Below-waterline repairs, structural work, core repairs, keel bolts

Vinylester Resin

• Cost: ~$50–$80/gallon — mid-range
• Water resistance: Excellent — the best of the three for below-waterline work
• Strength: Significantly stronger than polyester; good for structural repairs
• Adhesion: Compatible with polyester and gelcoat topcoats
• Use for: Hull blisters, below-waterline structural repair, barrier coats, keel-to-hull joint, any repair that will be below the waterline

Epoxy Resin

• Cost: ~$80–$150/gallon — highest cost
• Water resistance: Very good; better than polyester, slightly behind vinylester
• Strength: Highest of the three; 3–4× the tensile elongation of polyester; minimal shrinkage during cure
• Adhesion: Bonds to almost everything — fiberglass, wood, metal, foam core; BUT polyester and vinylester will NOT bond reliably over cured epoxy
• Use for: All structural repairs, core repairs, keel bolts, compression posts, tabbing, deck-to-hull joints, any repair where strength matters more than cost
• Critical rule: If you use epoxy for a structural repair and plan to apply gelcoat over it, you must use an epoxy-compatible barrier coat or primer first

Technical References

• Gougeon Brothers on Boat Construction — the definitive technical book on epoxy use in boatbuilding; free PDF from West System
• EpoxyWorks Magazine — free technical articles from West System on all aspects of epoxy repair
• Jamestown Distributors — How-To Guides — free PDFs on fiberglass repair; outstanding library

Epoxy & Fiberglass Supplies

• West System Epoxy — the industry standard for structural fiberglass repair; excellent technical support; the 105/205/206/207/209 hardener system is tried and true
• TotalBoat — excellent epoxy, fillers, and fairing compounds at competitive prices; direct-to-consumer; strong DIY community
• System Three Resins — Seattle, WA — high-quality epoxy systems; excellent cold-weather formulations for Pacific Northwest
• Jamestown Distributors — fiberglass cloth, woven roving, mat, all supplies; Bristol, RI
• US Composites — bulk epoxy and fiberglass at the best prices; good for larger jobs where cost matters
• Fibre Glast — carbon fiber, Kevlar, and fiberglass supplies; good selection for performance work

Cloth Types & Uses

• Woven cloth (6 oz, 10 oz): Structural laminate; good directional strength; use for tabbing, hull repair, deck repair
• Biaxial cloth (±45°): Excellent for curved surfaces; resists torsional loads; popular for hull repair
• Woven roving: Heavy, fast buildup; good for structural layup; coarser finish
• CSM (Chopped Strand Mat): Used between woven layers for adhesion; only compatible with polyester/vinylester (styrene dissolves the binder); does NOT work with epoxy
• Core materials: Divinycell foam (structural cores); end-grain balsa (decks, older boats); Corecell; Airex

YouTube Channels for Fiberglass Work

• Fitzee's Fabrications — serious, technical fiberglass and gelcoat tutorials
• Boatworks Today — fiberglass, painting, gelcoat; highly technical; outstanding production
• Fish Bump TV — Captain Joe; practical fiberglass repair and boat building from the ground up

Teak Care Products

• Semco Teak Sealer — popular single-component teak sealer; natural color; penetrating; annual application
• Star Brite — teak cleaners (2-part), brighteners, sealers; widely available at West Marine
• TotalBoat Teak Products — teak cleaner, brightener, and sealer
• Deks Olje D1/D2 — Norwegian teak oil; penetrating; excellent for teak rails and brightwork

Teak Deck Replacement

• King StarBoard — HDPE plastic; excellent teak replacement; no maintenance; does not rot; used on fishing boats and sailboats; cannot be finished with teak oil (doesn't need it)
• Teak Isle / Seadek — closed-cell foam non-skid; popular replacement for worn teak decks; comfortable underfoot
• Teak Decking Systems — synthetic teak planking; glue-down system; looks like real teak

Maintaining Real Teak Decks

• Teak decks on sailboats are high-maintenance and expensive to replace — budget $8,000–$25,000 for a full teak deck on a 35-foot sailboat
• DO NOT power-wash teak across the grain — it raises the soft grain and accelerates wear
• Sand ONLY with the grain, lightly, using 120–180 grit
• Re-caulk seams every 5–10 years depending on climate; use Sikaflex 290 DC or BoatLIFE Life-Calk for teak seams
• If the deck is down to 3/8″ thickness, replacement is likely more cost-effective than continued repair
• Many sailors remove teak decks and replace with non-skid gelcoat or Seadek — far less maintenance

Non-Skid Deck Surface

• Repaint non-skid with Interlux AwlGrip or Pettit Easypoxy non-skid topside paint + non-skid additive (Interlux 2333N)
• Interlux InterDeck is a self-contained non-skid topside paint; easy to apply
• Seadek foam padding: the most popular modern non-skid upgrade; custom-cut, adhesive backing; extremely comfortable and practical

Products by Application

• 3M 5200: Permanent adhesive sealant; use for keel bolts, through-hulls, and areas that should never need to be disassembled. Almost impossible to remove — use only where truly permanent adhesion is desired
• 3M 4200: Flexible sealant; good adhesion; easier removal than 5200; correct choice for most deck hardware, hatches, chainplates, and portlights
• Sikaflex 291: One-component polyurethane; good all-purpose marine sealant; flexible after cure; use for deck hardware and fittings
• Sikaflex 292: Structural bonding; higher modulus; for critical structural joints
• BoatLIFE Life-Calk: Polysulfide; the traditional choice for teak seams and deck joints; excellent flexibility; paintable
• Butyl tape: The correct bedding for portlights, windows, and under deck hardware — compressible, waterproof, easily removed; far better than sealant for any fitting that will need to be removed in the future

Bedding Guide: What to Use Where

• Cleats, stanchion bases, handrails: Butyl tape or 3M 4200
• Chainplates: Sikaflex 291 or 3M 4200; needs to be inspectable and renewable — do NOT use 5200
• Through-hulls and seacocks: 3M 5200 or Sikaflex 291 (depending on whether you want permanent or serviceable)
• Portlights and windows: Butyl tape for the frame; polysulfide or 4200 for perimeter seal
• Keel bolts: 3M 5200 or vinylester resin; permanent seal intended
• Teak seams: BoatLIFE Life-Calk or Sikaflex 290 DC
• Mast boot: Flexible marine sealant; must be removable; polysulfide or butyl

Bottom Paint Products

• Interlux Antifouling — Micron 66 (ablative), Fiberglass Bottomkote, Trilux 33; market leader in the US
• Pettit Antifouling — Trinidad SR, Ultima SR, Hydrocoat; strong West Coast and Great Lakes presence
• TotalBoat Bottom Paint — Krypton, Plus, and Spartan; competitive pricing; good reviews from cruising sailors
• Seahawk Paints — Biocop TF, Cukote; strong Florida and Gulf Coast presence

Ablative vs. Hard Bottom Paint

• Ablative (self-polishing): Wears away gradually, exposing fresh biocide; re-activates when the boat moves; best for boats launched for a full season; no buildup over years; Interlux Micron 66, Pettit Ultima SR, TotalBoat Spartan
• Hard antifouling: Does not erode; builds up over years; better for powerboats and racing sailboats that are trailered and launched frequently; Interlux Bottomkote, Pettit Trinidad

Regional Considerations

• Florida/Caribbean/Gulf: Maximum biocide needed; high copper content; hard-shell or ablative; reapply annually; Interlux Micron Extra, Seahawk Biocop TF
• Pacific Northwest: Strong barnacle growth; hard-shell paint performs well in cold water; Pettit Trinidad, Interlux Bottomkote Eco
• Northeast Atlantic: Moderate fouling; ablative paints work well; no-copper paints increasingly required in some areas (Connecticut, Long Island Sound)
• Great Lakes: Fresh water; less fouling than salt water; lighter paint coverage may suffice; check state regulations — some invasive species rules apply
• Chesapeake Bay: Moderate fouling in summer; copper-based paints generally permitted but check for local restrictions near marinas

Copper-Free Bottom Paint

• Some states (Washington, California, and parts of Connecticut) have restricted copper-based antifouling paints in certain waterways
• Interlux Trilux 33 — copper-free; zinc/pyrithione biocide
• Pettit Hydrocoat Eco — copper-free; popular in restricted areas
• Always check your state's current regulations before applying any bottom paint near environmentally sensitive areas

What Causes Blisters

Osmotic blistering occurs when water molecules permeate the gelcoat and bottom paint and reach the polyester laminate beneath. Water reacts with residual styrene and catalyst in the laminate, forming an acidic solution inside. Osmotic pressure causes the gelcoat to bubble outward. It is NOT structurally dangerous in early stages but gets worse over time and eventually damages the laminate.

• Blisters range from small pinholes to large soft bubbles the size of silver dollars
• Fresh water blisters faster than salt water (fresh water has more osmotic potential)
• Boats kept in the water year-round blister faster than those hauled seasonally
• Pre-1985 boats with hand-laid polyester laminate blister more readily than later boats

Blister Repair Process

• Haul and dry the boat: A wet hull cannot be properly repaired; haul and allow to dry for 6–12 weeks (or use a dehumidifier in the bilge) before doing blister work
• Open blisters: Grind or peel open each blister; wash with fresh water; allow to fully dry
• Determine extent: Small, scattered blisters = cosmetic issue; large blisters with damaged laminate = structural repair needed first
• Fill with vinylester or epoxy fairing compound: TotalBoat or West System 407 filler work well
• Apply barrier coat: 4–6 coats of epoxy barrier coat (Interlux Interprotect 2000E or West System 105/207 thinned) to seal the hull from future water intrusion
• Budget: DIY blister repair typically $200–$600 in materials for a 35-foot boat; professional barrier coat $1,500–$4,000