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Polyester repair · 7 steps

On a surface

The existing surface stays in the part: prepare it for bonding and do not apply release agent. Wax belongs only on a final exposed layer when specified by the system.

A gloved hand brushes resin onto fiberglass reinforcement in a repair.

  1. Step 1. Inspect the repair

    Identify the material and inspect the damage. For deep cracks, delamination or structural repairs, define the repair procedure first.

    Identify the substrate and its condition

    Confirm compatibility and the extent of damage before proceeding. A surface finish does not replace a structural repair.

  2. Step 2. Prepare the bonding area

    Remove wax, grease and contamination before sanding. Remove damaged material and prepare the repair profile for the job. Remove dust.

    Wipe clean first

    Sand the clean surface

    Remove dust

    Remove wax and contamination before sanding. Use the specified repair profile, abrasive and final cleaning method.

  3. Step 3. Cut the fiber and mix the resin

    Prepare the specified reinforcements and check their fit. Mix a manageable amount of unwaxed laminating resin according to its instructions.

    See how to prepare and mix resin

    Prepare the specified layers

    Then prepare the resin

    Follow the laminate design and unwaxed laminating resin instructions. The illustration does not prescribe a ply count or catalyst ratio.

  4. Step 4. Wet out the reinforcement

    Apply resin and place the fiber according to the repair sequence. Wet out the fiber without leaving dry areas.

    Place the reinforcement

    Wet out and make contact

    Use the reinforcement and sequence specified for the job. Wet out without dry areas or bridging; the backing shown is generic.

  5. Step 5. Consolidate and complete the layers

    Remove air and inspect each layer before continuing. Observe the interval for adding layers and the system's buildup limits.

    Remove trapped air before covering

    Consolidate each layer and inspect before adding another. Follow the allowed buildup and recoating intervals.

  6. Step 6. Allow to cure and prepare the finish

    Allow the specified cure to develop. Before sanding or coating a cured surface, perform the required cleaning and preparation.

    Allow the required cure

    Remove residue before finishing

    After the required cure, remove wax, barrier residue or contamination using the specified method before sanding or coating.

  7. Step 7. Apply the chosen finish

    For a gelcoat finish, continue to Gelcoat application → On a surface. For another finish, follow its compatibility and application instructions.

    Continue with gelcoat on a surface

    Apply evenly

    Verify the specified thickness

    Use the permitted application method and measure the specified wet-film thickness. Observe coat intervals; this diagram is not to scale.