OVERVIEW
What it is. FIR-STOCK® is a three-layer spruce panel with a polyolefin plastic coating on both outer surfaces. At 27 mm thick, it offers a high-performing and cost-effective alternative to birch plywood for formwork applications where reduced weight and lower cost are priorities.
Who it's for. FIR-STOCK® is designed for construction companies and formwork rental firms working on sites that require sturdy yet affordable panels. Ideal for small and medium-sized framed formwork, it suits both residential and commercial construction.
Why choose it. Thanks to its plastic coating, FIR-STOCK® delivers high abrasion resistance, nailing without chipping, reduced release agent consumption and fast cleaning with a pressure washer. Its service life is significantly longer than traditional three-layer panels, and it is fully recyclable at end of life.
CHARACTERISTICS
FIR-STOCK® panel is a formwork produced in 27 mm thickness, externally covered with a plastic overlay.
The polyolefin based plastic overlay allows a perfect, uniform, smooth, and impression free concrete finish, improving the result of the traditional three ply spruce panels:
- Abrasion resistance is considerably higher
- When nailed does not splinter
- Less release oil is needed
- Faster cleaning with high pressure water
- Panel’s lifespan increases considerably
F / 27
Sealed Edges
MECHANICAL RESISTANCE
The product’s impermeability keeps the original mechanical characteristics of the wood constant over time, preventing rapid deterioration.
| Type | F / 27 | |
| Thickness | mm | 27 |
| Weight | kg/m2 | 15 |
| Bending Resistance EN 789 | MPa | 35 |
| Elastic-Modulus EN 789 | MPa | 8.500 |
HIGH ABRASION RESISTANCE
Thanks to the plastic overlay the panel displays a high abrasion resistance.
Taber test
Scratch test
Technical Features of External Overlay
| Surface Material Water Absorption | < 3% | ISO R62 |
| Surface Hardness | SHORE D>70, GARDNER 5, JANKA 5,345 |
Catas |
| Abrasion Resistance cs17 500 g 10.000 revolutions | -0,25 g -0,14 mm | CS17 Solvay Lab. |
| Taber Abrasion Resistance | 17.000 revolutions | UNI 9115 DIN 68861/2 |
| Surface Material Burning Resistance | 23 mm/min | DIN 75200 |
| Salt Fog Resistance | The panel doesn’t show any alterations | DIN 50021 ISO9227 |
NAILABILITY
The images demonstrate the nailability of the FIR-STOCK® panel and the absence of splintering, which is common in phenolic film faced plywood.
Nail
Surface
EXCELLENT RESISTANCE TO CHEMICAL AGENTS
Thanks to its polypropylene based surface, the panel resists cement alkalis and other corroding agents.
SIZES AND STRUCTURE
The FIR-STOCK® panel can be supplied in standard dimensions, and other dimensions are available upon request.
Standard dimensions
| Code | Thickness (mm) | Internal structure | Dimension (mm) |
| F / 27 | 27 | Three Ply Spruce | 500/1000/1500 X 2000/4000 |
RECYCLABLE
The FIR-STOCK® panel consists of birch plywood core overlaid with a polyolefin based plastic sheet. A study has shown that it is possible to re-use the FIR-STOCK® panel at the end of its lifecycle. The panel, ground down with other materials, has been used as material to manufacture some products as shown below, injected with an open mold using Plastech technology (read more).
1. The panel
2. Manufacturing
3a. Example of a derivative product
3b. Example of a derivative product