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Polyester repair kit

The polyester repair kit includes polyester structural resin along with fiberglass mat.

Sea-Line® polyester resin combined with fiberglass mat is used for manual repairs, recommended for laminating, reinforcing surfaces, patching holes – especially in situations where the speed of repair execution is crucial.

WeightCode
250 g2392
Polyester repair kit

Technical informations

Color

  • Clear

Application method

Manually:

  • Brush
  • Roller

Product description "Polyester repair kit"

  • Sea-Line® structural polyester resin is recommended for laminating, reinforcing the surface, and patching holes and damage – especially in situations where the most important is a fast repair time.
  • In conjunction with the glass mat, it is used for manual repairs of damage.To obtain a fully-fledged and adequately strong laminate, use a 2:1 weight ratio of resin to glass mat for polyester or a 1:1 weight ratio of resin to glass fabric.
  • To finish laminated surfaces we recommend using Sea-Line® fillers, Sea-Line® epoxy primers, Sea-Line® topcoats or a Sea-Line® gelcoat repair kit.

The set includes:

  • a polyester structural resin
  • hardener
  • fibre glass mat (0,25m2)
  • disposable gloves
  • a brush and a cup with a scale for easy dosing of ingredients
  • instructions for repair

Basic information

TypeLaminates, steel
PlaceAbove and below waterline
FunctionLaminating, filling damages
ApplicationBrush, roll
Theoretical coverage0,5 m²
Coats numberAccording needs
Pot life 20°C10-15 min
Hardening time45 min

Surface preparation

  • Prepare a suitable piece of glass mat (approximately 2 cm beyond the damaged area).
  • Degrease the surface and sand it with P80-P180 sandpaper. Remove dust and degrease again.
  • Apply the prepared resin mixed with the hardener to the cleaned area with a brush.
  • Apply the prepared mat or fabric pieces. Thoroughly saturate the glass mat with resin, pressing with a brush or roller to completely remove air bubbles from the repair area.
  • If necessary, apply multiple layers of mat or fabric using a similar method.

To achieve a high-quality and sufficiently strong laminate, use the following weight ratio:

  • For mats, a 2:1 ratio – 2 kg of resin for 1 kg of powdered glass mat.
  • For fabrics, a 1:1 ratio – 1 kg of resin for 1 kg of glass fabric.

Further work

For finishing laminated sections, we recommend using products such as:

  • Sea-Line® epoxy fillers,
  • then Sea-Line® epoxy primers,
  • and finally Sea-Line® topcoats.

You have questions about the product - Polyester repair kit

    Also check

    Our FAQ answers to frequently asked questions

    Why the epoxy filler does not harden?

    Possible causes

    • Incorrect proportion of base and herdener,
    • Too low temperature of ambient and surface (less than 10ﹾC),
    • Mixing two components from two different manufacturers,

    How to prevent

    • Apply the correct proportions of components
    • Maintain steady temperature (around 20ﹾC) during the whole hardening process,
    • Use base and hardener from the same manufacturer

    How to remove

    • The uncured mass requires complete removal from the surface.

    Why are the streaks formed?

    Possible causes

    • Wrong viscosity and spraying technique,
    • Failure to maintain proper evaporation time and thickness of layers,
    • Incorrect spraying pressure,
    • Too low temperature of varnish, surface or space ,
    • Wrong thinner or hardener.

    How to prevent

    • Apply the right type of application method indicated by manufacturer,
    • Use working spray guns,
    • Both the object and material must have room temperature of 20ﹾC,
    • Apply correct proportion of base and hardener.

    How to remove

    • Grinding and polishing,
    • Grinding and painting,

    Why does the paint have no adhesion?

    Possible causes

    • Wrong surface preparation,
    • Skipping the primer in the system application process,
    • Use of universal thinners or replacements ,
    • Paint incompatibility.

    How to prevent

    • Correct surface preparation (grinding, clearing, degreasing),
    • Use primers which improve adhesion of paints,
    • Use thinners which are dedicated to each paints,
    • Use of paints which are compatible to each other.

    How to remove

    • Grind, clean and paint again.
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