Pannello Strato-Stock


A formwork panel with
birch plywood and plastic overlay

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STRATO-STOCK® is a birch plywood panel with plastic overlay.

The polyolefin based plastic overlay allows an improvement of the traditional phenolic panel:
:: Abrasion resistance is considerably higher
:: Does not splinter when the panel is nailed
:: Faster cleaning
:: The panel’s life is at least four times longer than traditional phenolic plywood.

The ILPA company was the first, in 1993, to patent and manufacture this new product for the formwork industry. Subsequently, using specific “joint development programmes”, it patented and made further versions, such as the Xlife panel.

Telaio con Strato-Stock

The gluing of each individual panel is checked by ultrasound.

Laser marking

Afterwards, the traceability of the panel is guaranteed by a laser marking on the back of the panel.

Bar code

Traceability is then marked on each packing unit label, with a lot number and a bar code.


Thickness EN 315,04 mm 9mm 8,3  9,5 12mm 11,312,3 15mm 14,215,3 18mm 17,118,2 21mm 20,121,1
Bending resistance EN 789,04 MPa 59 58 41 40 50
Elastic Modulus EN 789,04 MPa 4'100 4'500 5'600 6'000 7'300
No. of Plies 5+2 7+2 9+2 11+2 13+2
Weight Kg/m2 7,5 9 11,5 13,5 15,5


The images show the behaviour of STRATO STOCK and phenolic film faced plywood which have been subjected to the Taber stress test and to the scratch test. STRATOSTOCK panel doesn’t suffer any severe stress.

Taber Test

Taber Test

Taber Test

Taber Test


Technical Features of External Overlay

Surface Material Water Absorption < 3% ISO R62
Surface Hardness SHORE D>70,
JANKA 5,345
Abrasion Resistance CS17 500 g. 10.000 revolutions -0,25 gr. -0,14 mm CS17 Solvay Lab.
Taber Abrasion Resistance 17.000 giri UNI 9115 DIN 68861/2
Surface Material Burning Resistance 23 mm/min DIN 75200
Salty Fog Resistance The panel doesn’t show any alterations DIN 50021 ISO9227


The images show the easy nailability of the STRATO-STOCK® panel and the absence of splintering, which is common in phenolic film faced plywood.


Thanks to its polypropylene based surface, the panel resists cement alkalis and other corroding agents.

Resistenza agli agenti chimici


Resistenza agli agenti chimici

Vertical formwork

Resistenza agli agenti chimici

Vertical formwork

Resistenza agli agenti chimici

Horizontal formwork

Resistenza agli agenti chimici

Truck and Container Beds

Resistenza agli agenti chimici

Trays for Vibro-Compressed Products


The STRATO-STOCK® panel consists of a birch plywood core overlaid with a polyolefin based plastic sheet. A study has shown that it is possible to re-use the STRATO-STOCK® panel at the end of its lifecycle. The panel, ground down with other materials and using injection technology, has been used to manufacture the internal structure of a chair. Moreover, it has been demonstrated that it is possible to close the life cycle of our product with very little environmental impact.