Thin Film High Solids Intumescent Coating provide maximum protection & enables a high quality finish to be obtained similar to conventional decorative paints, preventing steel structures from crossing the critical temperature of 5500C, thus delaying the collapse of loaded steel structures for upto 2 hours and providing time for evacuation & fire fighting.Certified to BS 476 Part 20-21 : 1987 for F30, F60, F90, & F 120 minutes protection.Smooth fibre free robust decorative surface allows the architect to use the structural steel work as an integral part of the building design.Easy cleaning & maintenance. Rapid installation with typically DFTs below 2mm, Appearance of the structure is preserved without affecting the load bearing calculations.3-Layer Solvent Based System:(A) Primer HINTERGRUND 1966E: Solvent - based primer for fire protection coating for structural steel. To protect steel against corrosion & prepare the surface. Self extinguishing. Fast drying. Based on synthetic resins.Surface preparation should be carried out according to good painting practises. Remove all loose or powdery paint from the surface. The best results are reached by using sand blasting SA 2½ to DIN 55928 resp. EN ISO 12944.HENSOGRUND 1966 E can be applied by brush, roller or spray tip size : airless: 0,013' air: 1.2 mmThe drying time depends on temperature and humidity. At a temperature of approx. 20C and a humidity of approx. 65% the drying time is as follows:Dust dry after approx. 1 hourReady for over coating after approx. 24 hoursCoverage:190 g/m2 (DFT 50 - 60 microns)(B) Basecoat HENSOTHERM 3KS Outdoor: Solvent based fire protection coating for interior /exterior use - in accordance with national regulations for I-sections and hollow sections.HENSOTHERM 3KS Outdoor is a solvent based intumescent coating which reacts under the influence of heat by swelling to many times of its original thickness and producing a layer of carbonaceous foam that acts as an insulating layer to delay the steel from reaching its critical temperature.Applied to a measured thickness to provide the specified level of protection. Fire resistance class F30-120. BS 476 certifire CF 700 authorisation. To be applied on I - sections & hollow sections.HENSOTHERM 3KS Outdoor is a designed for use over suitable prepared and primed substrate.For already primed surfaces please ensure compatibility of existing primer with HENSOTHERM 3 KS Outdoor. Any damage (corrosion, impact etc.) Must be prepared carefully e.g. with HENSOGRUND 1966 E or other compatible primers.For base profiles sandblasting SA 2,5 according to EN ISO 12944-4 or manual cleaning St 3 is recommended.During application and total drying of the HENSOTHERM 3KS Outdoor coating system as well as transportation special protection measurements against weathering must be taken.Coverage:F30 - 925 g/m2 (DFT 500 microns)F60 - 1850 g/m2 (DFT 1000 microns)F90 - 2400 g/m2 (DFT 1300 microns)F120 - 3330 g/m2 (DFT 1800 microns)(C) Top Coat HENSOTOP 84 : Single component solvent based top coat for HENSOTHERM intumescent coatings. Coating on top for optical reasons and for moisture protection. A hard decorative self extinguishing, fast drying finish to seal the basecoat & provide an attractive, high quality finish. Available in various RAL Shades.Before topcoating make sure that the fire retardant coating is dried through (test by finger nail !)HENSOTOP 84 can be applied by brush, roller or spray Coverage:180 g/m (DFT 60 microns)