Resin to Fibreglass RatiosFor an effective fiberglass laminate, it is essential that the fibreglass material is thoroughly ‘wetted-out’ with Lay-up Resin (Resin A).The amount of resin needed to do this varies from one fibreglass material to another. The following table shows the amount of Resin A needed per square meter of material.
You can now use our Materials calculator to automatically work out your quantities for gelcoats, topcoats, resin and matting.
| Material Spread Rates (Note: CSM = Chopped Strand Mat) | ||
| Resin | Priming Plywood.
| Resin = 500g per m2.
|
| GelCoat | Gelcoating on mould surface.
| 550g per m2.
|
| Pigment Pastes
| Add 10% by weight to Gelcoat
| 100g per kg
|
| Catalyst
| Add 2% by weight to Resin or Gelcoat.
| 20g per kg
|
| Wax Solution
| Add 2% by weight to Gelcoat, to make “Topcoat” | 20g per kg
|
| Styrene
| Add 2% by weight for thinning resin.
| 20g per kg resin.
|
| 2 Part PU Foam
| Expands 25 times its original volume.
| 1kg per cu ft.
|
| PVA Release Agent
| On non porous surface
| 200g per m2.
|
| G4 Sealer
| Sealing porous surfaces
| 250g per m2.
|
| Carborundum Grit
| Spread onto wet gelcoat
| 1.6kg per m2.
|
Calculating QuantitiesExample; Area to be covered is 1m2.Thickness of CSM required is 3 layers of 600gTherefore, the total weight of CSM = 1.8kg (3 x 600g).Resin required for this laminate would be 4.5kg (1.8kg CSM x 2.5)
Please note that the information given is as a guide only. Allowances should be made for overlaps and natural wastage.
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