Saffro Mellow Coatings And Resins



Two-component air-drying polyurethane based primer containing zinc phosphate as anti corrosive pigment.

Recommended Use :-

It is recommended as a primer for MS surface in OEM applications as well as in Process industries like fertilizer plants, Refineries, Petrochemical industries for protection of steel pipelines and structural from corrosion.

Physical Data :-

COLOUR :- Yellow
FINISH :- Matt
THEORETICAL SPREADING RATE :- 13.33 sq.mt / lit at recommended DFT of 30 µ
FLASH POINT :- Base : Above 23° C Hardener : Above 30° C
DRYING CHARACTERISTICS (At 30° C and 65% Relative humidity) :- SURFACE DRY : 30 minutes HARD DRY : Overnight FULL CURE : 7 Days
SHELF LIFE :- BASE : 6months HARDENER : 6 months

Surface Preparation

Abrasive blasting to Sa 21/2 Swedish Standards is the best method of surface preparation. In case blasting is not possible, then the surface of steel should be manually cleaned with brass wire brush, coarse emery paper, scraper, etc to remove rust, dust, loose old coating, oil, grease, and other foreign contaminants. It is preferable to give a solvent wipe after surface preparation. The surface should be absolutely dry, moisture and oil free before primer application or Phosphated components by 7-tank pretreatment process of surface preparation.

Application Data

MIXING RATIO :- Base : Hardener (As per our recommendation)
APPLICATION :- By Brush / By Conventional Spray
THINNER :- Type 290
POT LIFE :- 3 hours min at 30° C
OVERCOATING INTERVAL :- MIN : 8 hours MAX :24 hours (if it exceeds, the surface should be roughened by emery scuffing grade 320)
COMPATIBILITY :- Can be top coated with Epoxy, Polyurethane, Chlorinated rubber and Alkyd finish coatings.

Application Method

Stir the Base part thoroughly. Mix the base and hardener as per our recommended ratio, by volume. Stir the mix gently to attain homogeneity. Add Thinner Type 290 into the mix, if required, depending on application method, and stir gently for few minutes. Allow the mixture to stand still (maturation) for about 10-15 minutes to initiate the reaction. Strain the paint through Nylon filter cloth of 200 mesh size and apply uniformly over the surface. All equipments used for above should be properly clean.

Application :- By Brush / By Conventional Spray / By Airless Spray

Generally no thinner is required for Brush application, however under adverse environmental conditions about 5% of thinner, by volume, can be added. Apply evenly in crossed manner and ensuring the uniform application. Use quality brushes for paint application.

For Conventional Spray application :-

Thinner : Type 290
Addition : 10-15%
Nozzle Orifice : 1.2 -1.4 mm
Nozzle Pressure : 40-70 p.s.i.

For Airless Spray application :-

Thinner : Type 290
Addition : Max 5%
Nozzle Orifice : 0.28- 0.37 mm
Nozzle Pressure : 1400-1800 p.s.i.


1. Do not apply paint when temperature falls below 10°C or rises above 50°C, when Relative Humidity is above 85% & during rain, fog, or mist. Do not apply on hot surface (above 50°C). Surface temperature must always be minimum of 3°C above Dew point.

2. Brushes and spray equipment should be cleaned with SAFFRO's recommended thinner otherwise equipment is liable to be damaged.

3. DFT variation can be obtained by change in application method / thinning ratio.

4. Shelf life indicated is minimum, for this Product in sealed conditions and it is subject to re-inspection thereafter. Individual component is required to be stored in cool, dry and covered condition, away from heat and ignition.

Health & Safety

This is a solvent based paint and care should be taken to avoid inhalation of spray mist or vapour as well as contact between the wet paint and exposed skin or eyes.

Limitation of Liability

To the best of our knowledge, the technical data in our literature are true and accurate at the date of issuance but are subject to change without prior notice. We guarantee our product to conform to the specifications contained herein. We make no other warranty or guarantee of any kind, express or implied, including merchantability and fitness for particular purpose. Liability, if any, is limited to replacement of the product or refund of the purchased price. Labour or cost of labour and other consequential damages are hereby excluded.