Lightweight & Water-Sealed GRP-Coated Panels
Our GRP-encapsulated plywood panels combine the strength of WPB plywood with the durability and weather resistance of GRP coatings. Each panel is fully sealed—including the edges—creating a lightweight, rigid, and moisture-proof alternative to solid GRP sheets.
This manufacturing process prevents rot, swelling, and water ingress, making these panels ideal for environments where traditional plywood would rapidly deteriorate. Panels can be supplied in standard sheet sizes or precision-cut to your exact specification.
Advantages
- Up to 40% lighter than solid GRP of the same thickness
- Fully waterproof and sealed on all faces and edges
- Suitable for structural, industrial, marine, commercial and public-area use
Standard Sheet Sizes
| Type | Dimensions |
|---|---|
| Standard Sheet | 1220 mm × 2440 mm |
| Large Format Sheet | 1525 mm × 3050 mm |
| Custom Sizes | Precision cut to your required dimensions |
Additional Specifications
| Specification | Detail |
|---|---|
| Thickness Range | From 9mm plywood core upwards |
| Top Surface | Gritted finish — Fine or Medium grade |
| Edge Finish | Fully sealed with GRP coating |
| Colours | Any BS/RAL colour, including bright visibility colours |
| Fire-Retardant Options | Available on request |
| Pre-Fabricated Cut-Outs | Notches, rakes, penetrations, and fixing holes |
Products Benefits
✅ Lightweight Yet Rigid
Strong structural performance at a fraction of the weight of solid GRP.
✅ Fully Sealed Against Moisture
GRP encapsulation protects the plywood core from water ingress and rot.
✅ Anti-Slip Gritted Surface
Fine or medium grit profiles provide reliable slip resistance in wet or industrial areas.
✅ Custom Sizes & Thicknesses
Available from 9mm upwards and cut to your exact size requirements.
✅ Fire-Retardant Options
Panels can be supplied with certified fire-rated properties upon request.
✅ Pre-Fabricated Cut-Outs
Supplied with notches, rakes, penetrations or fixing holes as required.
✅ BS/RAL Colour Matching
Available in any BS or RAL colour—including high-vis, brand or zone identification.
✅ Cost-Effective GRP Alternative
Up to 40% lighter and more economical than solid GRP sheets of similar thickness..
Gritted Encapsulated Plywood Panels — FAQs
Encapsulated plywood panels are WPB plywood sheets fully coated in GRP, including all edges, to create a waterproof, anti-slip and highly durable composite panel.
Yes. Every face and edge is sealed with GRP, preventing moisture penetration, rot and swelling.
They are typically up to 40% lighter than solid GRP sheets of equivalent thickness.
Fine and Medium grit finishes are available depending on the slip-resistance required.
Absolutely — they are specifically designed for wet, harsh, corrosive or high-traffic environments.
Yes. We can supply cut-outs, penetrations, drilled holes, rakes or notches to match your installation layout.
Yes. Any BS or RAL colour can be supplied, including high-vis or safety-zone colours.
Yes — fire-retardant encapsulated plywood panels can be manufactured on request.
Have a Question?
If you have a question, enquiry or require a bespoke solution, please don’t hesitate to ask.