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700C to 800C
Application of Epoxy CoalTar Coating:
Preparation of Coating:
Epoxy coaltar consisting of Epoxy Resin & Coal tar.
In order to obtain good working consistence the average mixing ratio as under:
Epoxy Resin : 100pbw
Epoxy CoalTar :200pbw
Ratio: 1 part resin & 2 Part Coal Tar The ratio will be slightly depending upon the temperature and working condition.
A) Concrete Surface:
The concrete/cement plastered surface shall be stable in construction free from cracks, potholes, honeycombs etc.The concrete should be cured as per for minimum of 28 days moisture free and the surface shall be dry, clean even in slightly rough, in line and level, maintaining required slope etc., The Surface must be clean & sound, remove all dirt, grease, curing compounds and other foreign matter by mechanical abrasion for acid etching. Remove water & dust from all surfaces prior to application.
B) Mild Steel Surface:
Mild steel surface are be prepared by sand blasting to remove all rust or scale. If sand blasting is not possible, power tool cleaning, wore brushing or abrading with coarse emery paper may be resorted to.
After proper mixing Epoxy Coaltar should be applied on clean & dry surface by wire brush. Epoxy coaltar is as elf hardening due to chemical reaction which occurs when the Epoxy Resin & Epoxy Coal tar are mixed together.
An initial setting in 3 to 5 hours at 30oC
Final setting occur in 24 to 48 hour sat 30oC Curing time 3-5 days at 30o
Working time at 30oC
20 minute (min)
Mixing Viscosity @ 25oC
3000 to 6000 m pa.
1.15 + 0.05
300-350 grm/per coat/Sqm.
100 micron/per coat
It is advisable to apply at least two coats to get an adequate film thickness.
Equipment & Hand should be cleaned before Epoxy Coaltar begins to set, so apand water is to be used for cleaning the purpose.
At the time of mixing or applying Epoxy Coaltar wear protection hand loves, goggle sand mask for protection.