Fibreglass (GRP) Boat Repair Kit

Applications

Fibreglass is a versatile repair material compatible with a range of substrates, from existing fibreglass to wood (e.g., timber decking and plywood) steel and concrete.

Take care to ensure that that adequate surface preparation has been undertaken in advance. This will centre on ensuring: (1) the source of any leak has been identified and stopped, (2) the surface is dry, (3) loose debris has been removed and adequate reinforcement has been installed prior to any application.

Fibreglass-based composites demonstrate superior properties to many metals, wood and concrete.

A seamless, durable and waterproof barrier that bonds well to a variety of substrates, it also has a high strength-to-weight ratio and an ability to be moulded into almost any shape, fibreglass makes an excellent repair system.

Recommended repairs are listed below:

• Boat hull repair
• Flat roof repair
• Canoe repairs
• Surfboard repair
• Composite repairs
• General repairs to surfaces & structures

Guides

Creating a reliable repair using fibreglass requires a degree of skill, care and attention.

Users should ensure the existing surface and underlying structure has been dried out, is free from contaminants (dust, debris and grease) and is clean. In some cases, a resin primer may be required to promote adhesion.

Our instructional step-by-step guides cover a wide range of topics and exist in both written and video format on fibreglass repairs. Technical support is also available for more bespoke applications. Books on fibreglass boat repairs cover this work in more detail, as do more detailed academic studies on glass fibre laminate repair strategies.

More specific information about the fibreglass boat repair kit contents can be found in the Technical Datasheets for respective products, as well as on individual product pages for polyester resin, glass fibre matting and MEKP catalyst.

Key Processing Information

Fibreglass repair kits should be stored in a cool, dry place away from sunlight.

Surface preparation is a critical step in creating an effective repair using fibreglass. Applicators should ensure the surface has been sufficiently dried, cleaned and rendered to maximise adhesion.

A G4 primer (optional) is recommended in certain repairs where ongoing damp or poor adhesion is expected.

Users should ensure the surrounding atmosphere and any surfaces the fibreglass laminate is applied to should be clean, dry and free of contaminants (dust, grease, moisture, debris, mould, etc.).More detailed instructions on fibreglass repair preparation and application can be found in our step-by-step guide.

More specific product information can be found in the Technical Datasheets for each product, as well as on individual product pages for polyester resin, glass fibre matting, resin topcoat and MEKP catalyst.

• Suitability: professional laminating, DIY and hobby usage

• Safety Precautions
  • Wear PPE: gloves, goggles and if working with resin, a mask unless working in a well-ventilated area. Use protective gloves when handling.
  • Read the MSDS in advance, plan ahead.

• Recommended working conditions: dry, ambient conditions (15 – 30 °C)

• Can be used from 15 to 30°C provided the atmosphere and surfaces is dry
• Resin-600 gram CSM ratio: prepare 1.5 – 1.7 kg of catalysed polyester resin prior to application.

Application

• Measure dimensions of the area for coverage in advance. Cut to size using a stanley knife. Glass fibre should be 10% above the desired surface area to accommodate trimming and ensure complete coverage. A smaller layer of glass fibre should be applied on top immediately after laminating. The second layer is designed to add structural reinforcement.

Storage

• Unopened shelf-life minimum of 12 months.
• Store at 2 – 20 ^oC in a clean, dark environment sealed inside an air-tight bag.
• Avoid moisture and other contaminants (liquids and particulates).
• Once opened, immediately seal after use. Use within 3 months

Safety

• Utilise protective gloves to avoid splintering when handling.
• Consider polyester resin safety recommendations when laminating.

Quality

Resin Library’s polyester resin is manufactured in an ISO9001 compliant environment. It is used by leading fibreglass roofing brands and is a high-performance ingredient in many fibreglass applications.