Frequently asked Questions
With this dry film thickness on a perfectly smooth surface the theoretical spreading rate is calculated as follows:
The practical rate is calculated by multiplying the theoretical spreading value by the corresponding loss factor:
The loss factor for coating jobs is determined by a construction superintendant based on several factors:
The complexity of the surface to be painted
Complex and small surfaces are virtually impossible to paint without losses, and this will increase the consumption well above the estimates.
Surface roughness
A rough surface implies the existence of "a dead space", which will require more paint to fill it in than a smooth surface does. In the case of a thin film shop primer this creates the effect of a larger surface, resulting in greater paint consumption as the primer film is evenly distributed along the peaks and depressions of the rough surface.
Coating methods and conditions
Losses due to atmospheric conditions, paint residues in the pump and hoses, insufficient skills of a painter, etc. lead to increased paint consumption.
Example. During application a 30% loss of materials results in 70% of the coating being transferred onto the surface.
Too high a temperature during application can lead to dry spray, poor coating film formation and finally result in premature corrosion.
Too low a temperature will also have an adverse affect on substrate temperature leading to drying deceleration, solvent retention risks, sagging and, if two-component materials were used, this can lead to insufficient curing and, as a result, to an increased risk of adverse reactions (exudation / fogging of one or more components of paint, e.g. its curing agent, plasticizer, etc.)
This may result in insufficient corrosion resistance, deficient chemical resistance and poor adhesion of subsequent layers.
For the environmental conditions required to apply O3 materials see the webpage of the product that interests you in the Materials section.
Currently, there exists a set of rules called SP 2.13130.2012 with rev.1, as amended in October 23, 2013. “Fire protection systems. Ensuring fire resistance for facilities under protection.” Under p.5.4.3 of this document, it is necessary to use structural fire protection in buildings that have the first and second degrees of fire resistance in order to provide proper fire resistance to a building’s load-bearing elements responsible for its overall stability and geometric immutability in a fire. It is allowed to use thin-layer fire protection coatings in load-bearing steel structures in buildings of the first and second degrees of fire resistance for structural elements with a reduced metal thickness of not less than 5.8 mm to meet the R 53295 GOST standard. According to p. 3.6 of the R 53296 GOST standard with rev.1 as amended in 09.07.2014, constructive fire protection is a way of protecting structural elements from a fire by creating a heat-insulating layer of a fire retardant on the heated surface of an element. Structural fire protection includes thick-sprayed compositions, plasters, a facing of slab, sheet or other fire protection materials, including those on a frame, with air gaps, as well as a combination of these materials, including thin-layer intumescent coatings.
According to p. 3.3 of the SP 2.13130.2012 set of rules with rev.1, the use of a thin-layer fire protection coating (an intumescent coating, paint) is a way to protect structural units from fire by applying to the surface of a structure being heated some specially designed paint formulations with a dry layer thickness of not more 3 mm, which increases protection several times when heated.