Matrix Engineered Mineral Board

Mineral bound calcium silicate boards.

PROMATECT®-L500 is a lightweight mineral matrix engineered board which is off-white/beige in color and has a smooth sanded surface on one face with a lightly honeycombed texture on the reverse face.

PROMATECT®-L500 is chemically inert and is resistant to diluted acids and alkalis. Boards should be protected where high chemical concentrations are likely to occur.

PROMATECT®-L500 is resistant to the effects of moisture and will not physically deteriorate when used in damp or humid conditions. Performance characteristics are not degraded by age or moisture. Untreated surfaces will absorb water which can cause some loss of strength but strength is regained after drying. PROMATECT®-L500 does not encourage mold growth and is resistant to attack by vermin.


  • Resistant to the effects of moisture
  • Not physically deteriorate when used in damp or humid conditions
  • Performance characteristics are not degraded by age or moisture.


    • Electrical Cable Enclosures
    • Wall Structures
    • Ventilation & smoke extraction enclosures


Promat products are manufactured to stringent quality control systems to assure that our customers receive materials made to the highest standards. Operating to these standards means that all activities, which have a bearing upon quality, are set out in written procedures. Systematic and thorough checks are made on all materials and their usage. Test equipment is subjected to regular checks and is referred back to national standards. The information given in this data sheet is based on actual tests and is believed to be typical of the product. No guarantee of results is implied however, since conditions of use are beyond our control.

Promatect-L500 Lithuania – Vilnius 2017

Designation:  Calcium Silicate Fire Protective Board

dimensions mm

area m2

Weight per board
(approximate kg)
Number of boards
per pallet

Weight per pallet
(approximate kg)

  2500 x 1200 x 15mm


31,5 30


  2500 x 1200 x 18mm


37,8 25


  2500 x 1200 x 20mm


42 25


   2500 x 1200 x 25mm


52,5 20


Board format (length x width):  1200 x 2500 mm
Board thickness: 20, 25, 30, 35, 40, 50, 52, 60 mm

DIN 4102, part 1 / Non-combustible
BS 476, part 4
AS 1503, part 1
EN 13501-1 (WFRGent Classification report 11529C)

Tolerance on length and width:  ± 3 mm
Tolerances on thickness: ± 0.5 mm
Density (nominal, oven dry):  ca. 500 Kg/m3
Alkalinity (approximate) : ca. 9 pH
Thermal conductivity λ :  ca.0.09 (at 20°C) W/m°K
Water absorption:  0.77 g/cm3
Moisture diffusion resistance:  ca. 3.2 μ
Typical moisture content (at EMC*) :  3 – 5 %
Surface conditions: Front face is smooth, sanded. Back face is lightly honeycombed textured
Color: yellowish
Storage: store on flat surface, in a dry area.
*EMC = Equilibrium moisture content



Bending strength (longitudinal direction) N/mm2 3.0
Tensile strength (longitudinal direction) N/mm2 1.2
Compressive strength (perpendicular to the surface) N/mm2 5.5

Screw pull out resistance: screwed in the surface

quick fix screw – 3.9 x 45 20mm deep
screw insert (Rampa) 15mm deep


Screw pull out resistance: screwed in the edge quick fix screw – 3.9 x 45 20mm deep
quick fix screw – 3.9 x 45 30mm deep



Thickness (mm) Dry weight (Kg/m2) Weight (Kg/m2) at 20°C, 65% RH
20 ca. 10.0 ca. 10.5
25 ca. 12.5 ca. 13.1
30 ca. 15.0 ca. 15.8
35 ca. 17.5 ca. 18.4
40 ca. 20.0 ca. 21.0
50 ca. 25.0 ca. 26.3
52  ca. 26.0 ca. 27.4
60  ca. 30.0 ca. 31.5


When machining the product with power tools, do not breathe dust and respect the regulatory occupational exposure limits for total inhalable and respirable dust. Wear safety goggles. Avoid contact with skin and eyes. Use dust extraction. In case of insufficient ventilation, wear suitable respiratory equipment to avoid health effects. For more information: request Safety Data Sheet.


Refer to local legislation

If not available: The board is not classified as a dangerous substance and no special provisions are required regarding the carriage and disposal of the product to landfill. They can placed in an on-site skip with other general building waste.


All physical and mechanical values are averages based on standard production and tested according to internal procedures. The typical values are given for guidance. The figures can change dependent on the test methods used. If a particular value is of prime importance for a specification, please consult Promat Technical Department.

Fire protective construction board PROMATECT®-L500

Technical data sheet Promat