Natural stones like marble, granite, or mosaics can be directly glued to the rough surface of the fibreglass panel. The resin used to impregnate the fibreglass has additives so that it maintains its transparent color.
CLEARSTEP is a lightweight sandwich panel with a polypropylene honeycomb core and skins of fibreglass impregnated with epoxy resin. It is particularly useful in the field of backlighting due to its clarity, which allows it to maintain the colours of stones, such as onyx, that can be glued onto it. The application of this panels for example permits huge savings as far as weight and thickness of the slabs of natural stones, such as marbles and granite and mosaics are concerned. In this way, also the costs of these materials can be reduced.
A - SKINS IN GLASS FIBRE FABRIC
Impregnated with epoxy resin 680g/m²
B - CORE IN POLYPROPYLENE HONEYCOMB

Technical data sheet for standard panels (dimensions, materials and special finishes on request) |
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Technical Characteristics of panel |
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| Panel size mm | from 6,4 to 30,4 | |||||
Panel size mm |
Standard dimensions 2000x3000
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Thickness tolerance mm |
± 0,4 |
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Dimension tolerance mm |
± 30 |
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Skins thickness mm |
0,7 |
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Skin |
Glassfibre fabric |
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Honeycomb type |
Polypropylene |
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Honeycomb diameter Ø = mm |
8 |
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Honeycomb thickness mm |
from 5 to 30 |
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Honeycomb density Kg/m³ |
80 |
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Adhesive |
Transparent Epoxy Resin |
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PANEL PHISIC AND MECHANIC PERFORMANCES |
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Panel Thickness (some examples) mm |
5 |
10 |
15 |
20 |
25 |
30 |
Panel weight Kg/m2 |
2,4 |
2,7 |
3,1 |
3,5 |
3,9 |
4,3 |
Compressive stabilised strength ASTM C 365-365 M Mpa |
1,75 |
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| Core shear modulus Mpa | 12,3 | |||||
Maximum load ASTM C 393 † N |
90±10 |
200±10 |
320±10 |
430±10 |
540±10 |
650±10 |
Deflection at maximum load ASTM C 393 † mm |
38±2 |
20±2 |
14±2 |
11±2 |
9±2 |
8±2 |
Skins E Elastic Modulus ** Mpa |
12000±2000 |
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Moment of inertia ** mm4/m |
6528 |
30328 |
71628 |
130428 |
206728 |
300528 |
Middle resistance to peeling ** ASTM D1781-98 (2012) |
>450 N/76 mm or >50 Nmm/mm |
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Maximum service temperature ** °C |
- 40 / + 60 |
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** Tested by Internal Laboratory
† Sample dimension with 4 support points (L,W) 540 mm x 50 mm
LIABILITY DISCLAIMER: The above data are to the best of our knowledge correct and are intended to give information about our products and their potential applications. No warranty is given or implied in respect of certain properties of the products or their suitability for a particular application. We reserve the right for technical changes without further notice. We guarantee impeccable product quality under our terms of sale.
To allow us to offer you a panel with particular finishes or colors without minimal pigment variations, it is recommended to place an overall order , so that we can plan the production with the rolling mills that will carry out the painting of the sheets in a batch.