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Marine Composite Repair Supplies

Marine composite repair supplies in stock and ready to ship: 1708 biaxial, woven and chopped strand glass, polyester, vinyl ester, and epoxy resin, color gelcoat, fillers, and release agents. The full repair from glass to finish, with in-stock house items shipping same day from our Florida stock.

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Offshore center console sport fishing boat running across clear blue water.

What we stock for this work

Close detail of a glossy white fiberglass boat hull with a deep gelcoat finish.

From transom rebuilds to gelcoat work, the same catalog covers the full repair from glass to finish.

Common applications

The jobs this catalog gets built for, and the materials each one calls for.

  • 01

    Transom and stringer rebuilds

    3 to 4 plies of 1708 biaxial wet out with polyester or epoxy for a thick structural laminate in one ply.

  • 02

    Hull and deck delamination repair

    grind back to sound glass, relaminate with CSM and woven or biaxial, fair with microballoon or fumed silica filler.

  • 03

    Gelcoat chip and crack repair

    color-matched gelcoat with MEKP, sanded and buffed back to a finish.

  • 04

    Below-waterline blister and osmosis work

    epoxy laminate and barrier coat over a dried, ground hull.

  • 05

    Fillets and fairing

    epoxy thickened with fumed silica for structural fillets, microballoons for low-density fairing compound.

Frequently asked questions

Should I use polyester or epoxy resin for a marine repair?
Match the resin to the existing laminate and the job. Polyester is the cheaper choice for repairs on a polyester hull and for new layup that will get gelcoated. Epoxy bonds to almost anything, including cured polyester, so it is the better pick for a structural repair, a bond to old glass, or below-waterline barrier work. Epoxy does not bond well under gelcoat, so plan the finish before you pick the resin.
How many plies of 1708 do I need for a transom?
For a typical transom rebuild on a 16 to 22 ft boat, run 3 to 4 plies of 1708 biaxial. The 17oz 0/90 or 45/45 bias plus the chopped strand backer gives a thick, structural laminate per ply, so you build the thickness fast without separate mat layers.
What is the difference between fumed silica and microballoons for fairing?
Fumed silica thickens resin without adding much bulk and is the choice for structural fillets and non-sag mixes. Microballoons (phenolic) make a low-density fairing compound that sands easily for cosmetic fairing above the waterline. They are different materials with different jobs, so do not swap one for the other on a structural fillet.
Do you stock the resin, cloth, and fillers for a complete repair?
Yes. The marine catalog covers the full repair from glass to finish: 1708 biaxial, plain weave and woven roving, chopped strand mat, polyester and vinyl ester and epoxy resin, color gelcoat, MEKP, fumed silica, and microballoons. In-stock house items ship same day from our Florida stock.
Can I get a shop account for repeat marine orders?
Yes. Boat shops and fabricators doing this work for paying customers can apply for a Wholesale Pro account for catalog pricing on repeat orders. Apply through the request a bulk quote link on this page.

Buying in volume for your shop or program?

Shops, teams, and programs ordering on a recurring basis can apply for Wholesale Pro pricing on the full catalog.

Request a bulk quote