General Industrial Coatings
Creating benchmarks with eco-friendly products & processes help our customers to work economically
Application Guide
Bus Body system:
Recommended application procedure of two coat painting system for bus body
- Substrate: Aluminum sheet, Galvanized, M.S. Sheet
- Sand the substrate by 180 # Emery Paper manually or with the help of pneumatic machine to remove rust, dirt etc. Time required for sanding is around 40-45 minutes. Then wipe with the thinner to remove traces of Oil, Grease and sanding rust. It will take around 20-25 minutes
- Then apply Putty to fill up dents (mixing ratio: 100: 2–3 gm by wt.) and allow to dry for 45 – 50 minutes before dry sanding with emery paper no 80 followed by 120 # , 180# and 320.Wipe off surface with Thinner & dry off with muslin cloth.
- Apply Primer Surfacer for Bus Body.
- Mixing ratio Base : Hardener :: 5 : 1 by volume
- DFT- 60 – 70 micron,
- Thinner intake- 25-30 % with thinner
- Allow drying for Over Night or can be Stoved at 80 degree C.
- Apply Putty to fill up minor dents (mixing ratio: 100: 2–3 gm by wt.).Leave it for one hour for drying. Wet sand with 320 # Emery Paper and wipe off surface with Thinner & dry off with muslin cloth.
- Apply primer Surfacer over putty applied areas. Allow it to dry for 3-4 Hrs at room temperature. Then wet sand with 320 # emery paper. Leave it for 15 minutes for Drying & followed by air blow.
- Apply Top Coat PU
- (Mixing Ratio : as recommended by supplier )
- Thinner intake 30 – 50 % by Volume and
- DFT- 50 ± 5 micron ( 2 Coats )
- Allow it to dry for 72 Hrs before testing.
Recommended application procedure of three coat painting system for bus body
- Aluminum sheet, galvanized, M.S. sheet
- Sand the substrate by 180 # Emery Paper manually or with the help of pneumatic machine to remove rust, dirt etc.Then wipe it with Thinner to remove traces of Oil, Grease and sanding rust.
- Apply Putty to fill up dents(mixing ratio:100: 2–3 gm by wt) Allow to dry for 45 – 50 minutes before dry sanding with emery paper no 80 followed by 120 # , 180# and 320 #.Wipe off surface with Thinner & dry off with muslin cloth.
- Apply primer
- Mixing ratio Base: Hardener :: 1:1 by volume
- DFT / coat 7-10 microns.
- Apply Primer Surfacer Grey – Matt
- Mixing ratio Base : Hardener :: 8 : 1 by volume
- DFT- 45-50 micron,
- Thinner intake- 30-40 % by volume.
- Allow drying for Over Night or can be Stoved at 80 Degree C for 30 Minutes, after 10-15 minutes flash off.
- Apply Putty to fill up minor dents (mixing ratio: 100: 2–3 gm by wt.) and leave it for one hour for drying. Wet sand with 320# Emery Paper. Wipe off surface with Thinner & dry off with muslin cloth.
- Apply Primer Surfacer Grey Matt over putty applied areas allow it to dry for 2-3 Hrs.Wet sand with 400 # emery paper and then leave it for 15 min for drying.
- Apply PU Top coat shades
- Mixing Ratio : as recommended by supplier
- Thinner intake 30 – 50 % by Volume and
- DFT- 50 ± 5 micron ( 2 Coats )
- Allow to dry for 72 Hrs before testing.
Fan Coatings:
Recommended application procedure of three coat painting system for bus body
Fan consists of Al blades & Rotor (Body) made up of casting. Blades are painted with single Topcoats and Rotor body is painted with Primer & topcoat.
- Substrate: Aluminum panel
- Chromatising: This is the general process for Pre treatment of Aluminum. This bath contains mixture of chromic acid, phosphoric acids and additives. It gives limited corrosive resistance.
- Stoving at 23-25 sec application viscosity by FCB4@30°c (dft 30-35µ).
- Flash Off for 6-8mins.
- Stoving @ 120°C/30mins.
- Ageing for 24hrs at room temp.
- Testing & Shade.
Gas Cylinders:
Recommended application procedure for Gas Cylinders
- Substrate: M S Cylinders
- Pretreatment
- Caustic soda cleaning: Any visible oil/grease should be removed and surface should be dry and clean.
- Furnacing up to 300°C
- Shot blasting: Shot blasting consists of attacking the surface of a material with one of many types of shots. The device that throws the shot is either a large air gun or spinning paddles which hurl the shot off their blades.
- Additional coat: Zinc Metallising by spray
- Primer
- Air Primer at 20-25µDFT and Flash off 30 minutes
- Air Dry at 25-30µDFT and Air Drying for 16–18 hours or bake at 120°C/30 Min.
Helmet Coatings:
Recommended application procedure for Helmets
Helmets are made up of plastic substrates having high Impact resistance with very good flexibility.
Substrates:
- Acrylonitrile Butadiene Styrene(ABS),
- Poly Propylene Co Polymer
- Fibre Reinforced Plastic(FRP)
Coatings: 2Comp. PU Low Bake type & Low bake stoving Type
Application method – ABS Plastics
- Substrates: ABS Helmet
- IPA Wiping
- Apply Top coat at 20-25µDFT
- Flash off 8-10 minutes and Bake at 60±5°C / 60±5 Min.
- Ageing for 4 Hrs
Application method – FRP Plastics
- Substrates: FRP Helmet
- 2 K Acric Ez HB PS at 35-40µ DFT and Bake at 60°C for 40 minutes. Wet sand with #220 Emery Paper.
- Apply Putty (97:3) and then Air dry for 40 minutes.
- Apply second coat of Acric EZ HB PS 35-40µ and Flash off 6-8 minutes.
- Stoving 60°C/40 Min
- Apply Top coat at 20-25µDFT and bake at 60°C for 40 minutes.
- Then Clear coat 25-35 µDFT and bake at 60°C for 30 Minutes.
Glass Coatings:
Recommended application procedure for glass coatings
- Substrate: Glass
- IPA Wiping
- Conductive Coating For Glass at 15 sec & 15±2µ DFT
- Flash Off for 8-10 Sec. and then Bake at 80°C/15 Minutes.
- Test dry Film conductivity and then air Dry for 72 Hrs.
Audio Video Cabinet Coatings:
Recommended application procedure for Audio Video Cabinet Coatings
- Substrate: HIPS- High Impact Poly Styrene.
- IPA wiping
- Acrylic Silver at 5-7µ
- Flash Off for 3 Minutes.
- Bake at 60°C for 10 minutes.
- Screen printing
- I/R baking
- Dispatch / Assembly shop
Material Handling Equipment Coatings:
Recommended application procedure for Material Handling Equipments
- Shot blasted Cast Iron Body and MS components
- Apply Primer and air dry for 30 minutes at 5-8 µ DFT
- Apply Zinc phosphate primer @50-60µ DFT Air dry for 18 hrs
- Then apply Putty on localised area and NC Putty application on total area
- Wet scuffing dry and clean
- Two comp PU primer at 35-40 µ
- Flash off 10 minutes
- Two comp PU Top coat at 35-40µ and Air dry
Agricultural Equipment Coatings:
Recommended application procedure for Agricultural Equipments
Application Method for Alkyd Based Coating
- Substrate: MS Components
- Zinc phosphating
- Apply Grey Primer and then flash off for 10 minutes
- Stoving at 120°C for 30 minutes
- Stoving Enamel
- Flash off for 10 minutes
- Stoving at 120°C for 30 minutes
Application Method for Two Comp PU System
- Substrate: MS Components
- Zinc phosphating
- Apply Two comp PU Primer seed at 30-35µ DFT
- Flash off for 10 minutes
- Then apply Two Comp PU Top Coat at 30-35µ DFT
- Flash off 10 minutes
- Forced drying 80°C for 30 minutes
Barrel Coatings:
Recommended application procedure for Barrels
- Substrate: Mild Steel Barrel
- 3 in 1 Pretreatment
- Dry & clean
- Barrel painting (DFT 25 -27µ)
- Flash Off at 90 Sec.
- Bake it and then cool it for 15-20 Minutes.
- Stenciling
- Store and dispatch.