Description
Protite Fibreglass Resin is a low styrene emission (LSE) polyester resin for repairing cracks, dents, holes and worn patches on boats, caravans, cars, trailers, gutters and more, supplied here in a 500g size. Mixed with catalyst hardener and used with fibreglass matting or cloth, it gives DIYers and tradies a strong, workable repair material with good adhesion and a consistent wet-out.
About the formula
A polyester LSE resin designed for general repair work. Once catalysed it cures to a hard, sandable and paintable finish that resists shrinkage and UV exposure. The resin is a viscous liquid and contains styrene, so it has a strong aromatic odour while you work. It does not cure on its own: you need to add a catalyst hardener (sold separately). Protite also offers a repair kit that bundles the resin with catalyst, matting and application accessories.
Where to use it
Indoors: repairs to fibreglass, timber, metal and plastic items, models and workshop projects, provided you have good ventilation.
Outdoors: caravans, boats, trailers, bikes and cars, plus downpipes, leaky gutters, metal roofs and rusted panels, as well as fibreglass surfboards, pools and tanks.
Suitable materials include fibreglass, steel, iron, aluminium, timber, masonry, PVC and smooth polyester surfaces. Test an inconspicuous area first when working on other plastics.
How to use it
Clean the damaged area and remove loose material, grease and dust. Sand the surface so the resin has a key to grip. Pour only the amount of resin you can use in one session into a clean mixing container, then stir in the catalyst hardener. The catalyst manufacturer's guide is 2.5 to 3ml per 100ml of resin on a cold day, or 1.5 to 2ml per 100ml on a hot day. Mix thoroughly with a flat stirring stick until the colour is even. Work the resin into the repair (with matting or cloth if needed) by dabbing or rolling it out slowly to avoid trapping air bubbles. Allow it to cure, then sand and paint as required. Weather, humidity, depth of resin and draughts all change the amount of catalyst you need.
Important notes
Uncatalysed resin will not harden, and too little catalyst or a very thin application can leave the resin tacky or uncured. Too much catalyst makes it gel sooner than expected. The manufacturer indicates the mix starts to gel after about 30 minutes at 25°C, and heat or extra catalyst shortens this while cold or less catalyst lengthens it. Take care when using polyester resin over epoxy surfaces and check compatibility first. Cure times depend on temperature and the amount of catalyst used. Clean tools before the resin cures.
Specifications
| Brand |
Protite |
| Product |
Fibreglass Resin (LSE) |
| Size |
500g |
| Model number |
PF-FR0500 |
| Base |
Polyester resin, low styrene emission |
| Catalyst |
Required, sold separately |
| Application |
Hand applied after mixing with catalyst, dabbed or rolled out |
| Finish |
Sandable and paintable |
| Resistance |
UV and shrink resistant |
| Use |
Interior and exterior |
Safety
Use outdoors or in a well-ventilated area. Wear suitable gloves, eye protection and protective clothing, and avoid breathing vapours. Keep away from heat, sparks and open flames. Store in a cool, dry, well-ventilated place out of direct sunlight and away from ignition sources and incompatible materials, with the lid closed and out of reach of children. Refer to the Safety Data Sheet (SDS) for full details.
