PRODUCT DATASHEET

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TECHNICAL DATA

Property	Value
Colour	Grey
Gloss	Matt
Recommended DFT / Coat	50 – 75 µm
Theoretical Coverage Capacity	12.0 sq.mtr/l @ 50 µm 8.0 sq.mtr/l @ 75 µm
Drying time at 30°C	Surface dry: 30 minutes Hard dry: 16 hours Full cure: 7 days
Overcoating interval at 30°C	Min: 16 hours Max: Unlimited (surface must be free from contamination, corrosion, zinc salts)
Method of Application	Air spray & Airless spray

Notes:

• The data given is guideline only.
• Physical values are subject to normal manufacturing tolerances, colour and testing variances.
• Actual drying/overcoat time depends on thickness, ventilation, humidity, temperature.
• Values based on 30°C and 65% RH.

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DIRECTIONS FOR USE

Surface Preparation

General

• Surfaces must be dry, clean and free from contaminants
• Remove dirt, dust, oil, grease as per SSPC–SP1 solvent cleaning
• Surface should be checked and treated as per ISO 8504 prior to priming

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Blast Cleaning

• Steel: Abrasive blast clean to min. Sa 2.5 (Swedish Std.)

• If oxidation occurs between blasting & application, re-blast
• Recommended profile (Rz): 40–70 µm

• Galvanised steel: Sweep blast to roughen and remove zinc salts

• Heavily pitted steel: Not acceptable

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Application Conditions

• Substrate temperature ≥ 3°C above dew point but < 50°C
• Relative humidity must be above 50%
• Provide good ventilation in confined areas

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Mixing

Supplied in two packs:

• Liquid component (Hydrolysate)
• Powder component (Zinc dust)

Mixing procedure:

1. Do not open packaging until ready to use
2. Loosen settled material in liquid using hand stirrer
3. Follow with power stirrer
4. Add zinc dust gradually into hydrolysate under continuous stirring
5. Do NOT reverse order (leads to lump formation)
6. Strain mixture through 30–60 mesh screen
7. Maintain constant agitation during application
8. Consume entire mixture within pot life

Mixing Ratio (by weight)	Hydrolysate (Liquid) : Zinc Dust (Powder) = 65 : 35
Induction Time	None
Pot Life @ 30°C	6 hours

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Application

Brush / Roller

Not recommended

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Air Spray

Parameter	Specification
Recommended thinner	T-144
Volume of thinner	10 – 25%*
Nozzle orifice	2.0 – 3.0 mm
Nozzle pressure	0.3 – 0.4 MPa (3–4 atm; 43–57 psi)

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Airless Spray

Parameter	Specification
Recommended thinner	T-144
Volume of thinner	10 – 25%*
Nozzle orifice	0.48 – 0.64 mm
Nozzle pressure	15 MPa (≈150 atm; 2100 psi)

*Depends on recommended thickness and application conditions

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Cleaning

• Do not allow product to remain in hoses, gun or spray equipment
• Clean equipment immediately after use with Thinner T-144

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PRODUCT CHARACTERISTICS

• Keep spray gun at proper distance for smooth, wet coating
• Thinner quantity must be optimized for correct film formation
• Humidity-sensitive:

• Requires minimum 50% RH
• Steel temperature must be ≥10°C
• For steel temperature >40°C, add extra thinner to avoid dry spray
• If RH <50%, curing is severely retarded
• Cure can be promoted by spraying fresh water after 4–6 hrs and keeping it wet until fully cured

• Excess film thickness >125 µm → Mud cracking may occur
• Low film thickness affects performance
• Not suitable for immersion in alkaline (pH > 9) or acidic (pH < 5) liquids without suitable topcoats

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OVERCOATING & TOPCOATS

• Overcoat only when the coating is completely cured
• Surface must be clean, dry, free from soluble salts and zinc corrosion products
• Zinc silicate primers form white rust if exposed too long; remove fully before overcoating
• Apply a mist coat as first pass to reduce solvent popping
• Recommended topcoats:
– Epoxies
– Chlorinated rubber
– Acrylics
– Polysiloxanes
– Heat-resistant silicones
– Others as advised by Asian Paints PPG

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PACK SIZE

20 L

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STORAGE

• Shelf life: At least 6 months at 30°C (unopened)
• Store in cool, dry place as per local regulations

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REGULATORY INFORMATION

Property	Value
Flash Point	Liquid: ≥15°C Powder: >65°C
VOC	480 – 530 gm/ltr (as per US EPA Method 24)

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SAFETY INFORMATION

• Avoid inhalation of vapours/mist and contact with skin/eyes
• Provide forced ventilation in confined spaces
• Even with ventilation, use respiratory, skin, and eye protection during spray
• Refer to MSDS before use

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REFERENCES

Product Data Sheet – APCOSIL 605 PRIMER / APCOSIL 601
Issued by Asian Paints PPG Pvt. Ltd. – September 2019
Document Version: PC 7078
Source: https://www.asianpaintsppg.com

Technical Guidelines and Explanatory Notes
Last accessed: 28 May 2025
Reference link:
https://www.asianpaintsppg.com/service-support/technical-guidelines

Note: Always consult the latest version of the Product Data Sheet and related documents directly from Asian Paints PPG’s official website for the most accurate and updated technical information.