Alubond USA is a  registered brand  name of American Building Technologies located in Rockford Illinois with production bases in Europe, Middle East, Iran, Turkey and India with an annual production capacity of 25,000,000 M2 ( Twenty Five Million  square meters ) and the brand ownership is now fully transferred and the brand is now owned by Mulk Holdings.

Alubond-Stone (FR-A2) is the new generation exterior fire retardant Panels with over 90% Stone core sandwiched between two layers of metal skins.  Alubond – Stone (FR-A2) patented core formulation with a high percentage of Magnesium Hydroxide provides superior fire retardant capabilities making it  an extremely safe cladding solution for buildings worldwide.  Alubond – Stone (FR-A2) has passed stringent Fire test certifications all over the world achieving  product classifications as per EN 13501 – 1 A2
S1 d0 (Over 90% Stone core  content) and EN 13501 – 1 B S1 D0 ( Over 70% Stone core  content).



The solid mineral magnesium hydroxide, with the chemical formula Mg(OH)2 is a common alteration product of periclase in marble; a low-temperature hydrothermal vein mineral in metamorphosed limestones and chlorite schists; and formed during serpentinization of dunites. It is often found in association with serpentine, calcite, aragonite, dolomite, magnesite, hydromagnesite, artinite, talc and chrysotile.

Advantages of Magnesium Hydroxide

  • Filler and Flame Retardant/Smoke Suppressant in one product
  • Environmentally Acceptable
  • Halogen Free
  • Non-Corrosive
  • Reduces Smoke Density
  • Non-Volatile
  • Largely Inert
  • Thermally Stable up to 340º C and thereafter undergoes Endothermic Decomposition releasing Water

What is Endothermic & Exothermic Reaction ?

LDPE (Low density Polyethylene) is a hydrocarbon material which exhibits exothermic reaction by releasing energy  when exposed to heat.  Mg (OH)2 is a natural mineral which exhibits Endothermic reaction by absorbing heat when exposed to energy/ heat.

Magnesium Hydroxide Structure :


Comparison of Magnesium hydroxide with Aluminum trihydrate

  ATH Magnesium Hydroxide
Molecular Formula Al (OH)3 Mg (OH)2
Water Content Loss on Ignition (LOI) 34% 31%
Decomposition Temperature) Greater than 230º C Greater than 330º C
Mohs hardness 2.5–3.5 2.0-3.0
Specific Gravity 2.42 2.36
pH 10-8 10.5
Electrical Conductivity us/cm Less than 350DIN 53208
Color White White
Physical Properties Powder Powder
Refractive Index 1.57 1.58
Particle Morphology Hexagonal Platelet Hexagonal Platelet