Vinyl-Aliphatic Urethane Primer and Finish Coat Supplier in China
Vinyl-Aliphatic Urethane Primer and Finish Coat paint coating manufacture Shenzhen China  
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Vinyl Fouling Topcoat
Vinyl-Aliphatic Urethane Primer and Finish Coat
Vinyl Wash Primer
Vinyl Red Oxide Primer

Vinyl Intermediate Coating
Vinyl Anti Fouling Topcoat
Vinyl Acrylic Based Exterior Flat Finish
Thin-Film Vinyl Ester Coating
Thick Vinyl Ester Coating
Solvent-thinned Chlorinated Vinyl Toluene-acrylate Low Lustre Coating
Self-etching Zinc Chromate Pigmented Vinyl Wash Primer

Reinforced Trowel Applied Vinyl Ester Lining
Premium Quality Full-bodied Smooth-flowing Vinyl-acrylic Primer
Abrasion Resistant Vinyl Ester Coating
Catalyzed Vinyl Ester Primer
Chlorinated Vinyl Toluene-acrylate Low Lustre Coating

High-hiding Non-bridging Premium Plus Vinyl Flat Finish
Catalyzed Vinyl Ester Primer
Epoxy Vinyl Primer


Vinyl-Aliphatic Urethane Primer and Finish Coat


A high-performance, corrosion-, chemical-, and weather resistant protective coating system, including HJ-291 Primer and HJ-0545 series Finish Coat. The coatings utilize and aliphatic polyurethane and a vinyl polymer to create a chemically cross-linked dual-polymer system that provides a combination of outstanding physical properties including flexibility and impact resistance together with hardness, chemical, solvent, moisture and water resistance.
The vinyl modification also provides an excellent surface for maximum adhesion of topcoats and overcomes the relatively poor intercoat adhesion, recoat and reparability properties that are characteristics of tightly cross-linked epoxy and urethane coatings.
HJ-291 Primer contains a highly effective and environmentally safe inhibitive pigment and is free of lead, chrome and strontium containing compounds. It forms strong bonds with ferrous metals, is designed to no prolong the service lives of high-performance topcoats, and provides optimum performance in exterior atmospheric exposures and in marine exposures from the tidal zone and up.
HJ-951 Finish Coat is available in 10 environmentally compatible architectural colors and when applied over HJ-291 Primer, or other suitable primer, provides an attractive semi-gloss appearance together with the excellent performance properties described above, including greatly improved recoatability and reparability.
Recommended Uses

  • Process equipment and piping—chemical, fertilizer, petroleum, primary metal, pulp and paper industries
  • • Storage tank exteriors—agricultural, chemical, petroleum, water works
  • • Marine and offshore equipment—tidal zone and up
  • • Electrical substations and transformers
  • • Structural Steel
  • • Galvanized Steel— buildings, platforms, towers
  • • Metal buildings—siding and roofing
  • • Heavy Construction—bridges, docks, power plants
  • • Material handling equipment—ducts, chutes, hoppers
  • • Transportation equipment
  • • Gas distribution plants—piping and valves


  • • Outstanding adhesion to substrates and topcoats
  • • Non-yellowing
  • • Excellent recoatability properties
  • • Superior corrosion and chemical resistance
  • • Resistant to underfilm corrosion attack
  • • Excellent toughness and flexibility
  • • Excellent wetting and penetration properties
  • • High impact and abrasion resistance, especially at lower temperatures
  • • Air dries set-to-touch in 30 minutes
  • • Resistant to moisture, condensation, and humidity
  • • Low temperature curing: °F (-7°C)

Chemical Resistance Guide*


Splash and Spillage

Fumes and Weathering







Petroleum Products













Salt Solutions






F-Fair; G-Good, E-Excellent, NR-Not Recommended.
*Note: List shows typical resistance of HJ-951. Certain colors may be affected by specific environments.
Surface Preparation
For guidance in methods of surface preparation and for visual standards refer to detailed specifications .
To ensure optimum long-term coating system performance, surfaces must be clean, dry, and free from oil, grease, dirt, salts, welding flux, mill scale, rust,
corrosion products, oxides, old paint or other foreign matter.
Steel: For non-immersion service—after completion of preliminary surface preparation work, abrasive blast surface per SSPC-SP1, “Solvent Cleaning.” Remove all surface imperfections that will induce premature coating system failure. Chip or scrape off weld spatter. Grind down sharp and rough edges, slivers, gouges, pits and projections. Fill in bad areas with acceptable filler material. Sharp edges and projections are difficult to coat properly and will leave little or no coating to protect underlying steel.
New Galvanized or Aluminum Surfaces: After completion of preliminary surface preparation work, apply one coat of HJ-8861 Wash Primer to precondition and etch surface. This step is necessary to ensure optimum adhesion of HJ-291 primer or HJ-856 series topcoats. DO NOT apply coatings directly to untreated surfaces.
Weathered Galvanized Surfaces: After completion of preliminary surface preparation work remove rust or foreign deposits by wire brushing per SSPC-SP2, “Hand Tool Cleaning,” or power tool cleaning per SSPC-SP. Apply one coat HJ-8861 Wash Primer as described above.
Aged-Exposed, Zinc-Rich Primer Surfaces: After completion of preliminary surface preparation work remove corrosion products, dirt and chemical contaminants by steam cleaning, water blasting, or brush blasting. Repair areas damaged during field welding by brush application of HJ-6012 organic zinc-rich primer.
Before opening containers and mixing components together note pot life limitations listed below. Mixing ratio is 9 parts Part A to 1 part Part B by volume of HJ-951 or HJ-291. Mix components separately, then combine and mix thoroughly with power agitator before use. IMPORTANT: Part B is extremely moisture sensitive. Only open container just before mixing, with Part A. Keep containers tightly closed during storage.
Cover paint pot after mixing and keep covered during application to prevent overexposure to atmospheric moisture, particularly in conditions of high humidity. Do not mix more paint than can be used during pot life period.
Pot Life
Pot life is 8 hours at 70°F (21°C) and 50% relative humidity. Pot life varies with temperature and humidity and decreases as temperature and humidity increase. For limitations see Physical Properties section. D o not apply coatings that have aged beyond recommended time limits.
Application Guidelines
Apply by conventional or airless spray. Brush or roller can be used for small or confined areas. The following equipment or equivalent can be used:

* Smaller hose diameter or length over 25 ft. may require increases pressure
Provide material pot with agitator, regulators for fluid and air pressure, and oil and moisture trap in air supply line.
Brush: Use only pure bristle brushes.
Roller: Use only metal backed mohair type roller. Do not use plastic type roller. Keep roller thoroughly saturated to obtain correct film thickness. Do not squeegee coating or apply excessive pressure. Cross roll for uniform coverage.
Application Temperatures
Refer to table in PHYSICAL PROPTIES section for limitations. To prevent moisture condensation do not apply primer or finish coat unless surface temperature is 5°F (3°C) above the dew point. Cure will be retarded below minimum surface temperature.
Application Procedure

  • 1. Flush spray equipment with Honest joy 124 Thinner before use.
  • 2. Thinning—use thinners cautiously. Thinning of activated coating or of individual components is not normally recommended. Addition of a small amount of thinner will cause a great reduction in coating viscosity. Excessive thinning will cause runs or sags. In cold weather if thinning is required to establish proper spray pattern use up to 1/2 pint Honest joy 124 Thinner per gallon of HJ-951 Finish Coat or HJ-291 Primer.
  • 3. For conventional spray, use adequate air pressure and volume to obtain proper atomization.
  • 4. Apply HJ-291 Primer over properly prepared surface to a dry film thickness of 2-3 mils (50-75 microns) using “crosshatch” method with 50% overlap on each pass to avoid pinholes and bare areas. On irregular surfaces coat all edges first.
  • 5. Apply HJ-951 Finish Coat over properly cured, clean, dry HJ-291 Primer, or other approved primer, to a dry film thickness of 4-6 mils per coat (100-150 microns).
  • 6. For inorganic Zinc-Rich Primer apply a very thin “mist” coat of HJ-951 Finish coat to partially seal the porous surface prior to application of a full heavy coat, or apply a tie coat of HJ-8861 Wash Primer to a dry film thickness of .5 to 1 mil.

Recommended Top Coats for HJ-291 Primer

  • • HJ-951 Vinyl-Aliphatic Urethane
  • • HJ-870 Acrylic-Urethane
  • • Endcor-10 Modified Acrylic
  • • HJ-017 Elastomeric Rubber

Recommended Primers for HJ-951 Finish Coat

  • • HJ-291 Vinyl-Aliphatic Urethane Primer
  • • HJ-4841 Vinyl-Aromatic Urethane Primer
  • •HJ-488 Inorganic Zinc-Rich Primer
  • • HJ-8861 Vinyl-Butyral Wash Primer

Curing Time
HJ-291 Primer and HJ-951 Finish Coat will dry set-to-touch in 30 minutes at 70°F (21°C). Final curing time will depend upon film thickness, ventilation, temperature, and relative humidity. At low temperatures cure rate can be accelerated by addition of 1-2% of HJ-66 Curing Catalyst. For many types of service, coating system can be placed into use before final cure is attained.
Recoat Time
Surface must be clean and dry at time of recoating. Recoat time for HJ-4945 or HJ-4951 is 3-4 hours minimum at 70°F (21°C) and 50% RH. Higher temperatures will accelerate cure and shorten recoat time. Lower temperatures will retard cure and lengthen recoat time. For limitations see Physical Properties section.
Store in dry place with temperature no lower than 50°F (10°C) or higher than 100°F (38°C). Keep containers closed and upright to prevent leakage.
Clean up
Thoroughly flush spray equipment and hoses immediately after use, or if application is stopped more than 15 minutes, using Honest joy 124 Thinner.
Dismantle spray equipment parts, brushes, and rollers with Honest joy 124 Thinner.
Precautionary Information
Important—Before mixing components of HJ-951 or components of HJ-291 Primer carefully read the precautionary statements for each components. Any mixture of components will have hazards of both components.
HJ-951 Part A—Warning! Flammable. Contains vinyl resin and xylene, ketone, and ester solvents.
Harmful if inhaled. May affect the brain or nervous system, causing dizziness, headache or nausea. Causes nose and throat irritation. Causes eye irritation. Causes skin irritation.
HJ-291 Part A—Warning! Flammable. Contains vinyl resin and xylene, ketone, and ester solvents.
Precautions are the same as for HJ-951 Part A
HJ-4958 Part B (for use with HJ-951 part A or HJ-291 Part A) —Warning! Flammable. Contains aliphatic polyisocyanate, hexamethylene diisocyanate and xylene.
Harmful if inhaled. May affect brain or nervous system, causing dizziness, headache, or nausea. Causes nose and throat irritation. Causes lung irritation. May cause allergic respiratory reaction. Effects may be permanent. Causes skin and eye irritation. May cause allergic skin reaction. Individuals with lung or breathing problems or prior reaction to isocyanates must not be exposed to vapor or spray mist.
The following safety precautions apply to both Part A and Part B and should be observed during application:
Keep away from heat, sparks, arc and flame. Vapors may cause flash fire. Do not breathe vapor or spray mist. Avoid contact with eyes, skin and clothing. On contact with skin, uncured coating can be removed by immediately washing with soap and water. Coating which has cured on skin is very difficult to remove. Wash thoroughly after handling. Use only with adequate ventilation during mixing, application and drying. U Follow manufacturer’s directions for respirator use. Wear neoprene gloves, chemical safety goggles, and protective clothing. In confined areas, require a hood-type, airline, hood-type respirator. Use only non-sparking tools and footwear. Use explosion proof lights and electrical equipment. DO NOT arc weld in an area where solvent vapors may be present as hazardous
fumes and gases may be produced. Make certain all electrical equipment is grounded.
FIRST AID: Eye contact-flush immediately with clean, lukewarm water for at least 15 minutes, occasionally lifting eyelids. Obtain medical attention. Skin contact-wash affected areas with soap and water. Wash contaminated clothing before reuse. Inhalation- If affected by vapor or spray mist remove person to fresh air. Administer oxygen or artificial respiration as needed. Call a physician. Ingestion- Consult a physician.
Spillage and Disposal
Keep containers closed when not in use. In case of spillage absorb with inert cleanup material and dispose of in accordance with applicable federal, state and local regulations.
Notice: Reports have been associated repeated or prolonged occupational overexposure to solvents with permanent brain and nervous system damage. Intentional misuse by deliberately concentrating and inhaling the contents may be harmful or fatal.
See MSDS for additional safety information
If you cannot strictly comply with these warnings and instructions do not sue these products.
Not Recommended for

  • •Immersion Service
  • •Aromatic or Oxygenated solvents
  • •Concentrated Acids
  • •Bleaches or Oxidizing Agents

Technical Data


HJ-291 Primer

HJ-951 Finish

Generic Type

Vinyl-aliphatic urethane
Light Gray

Vinyl-aliphatic urethane
See Our Color Card

Weight per gallon (mixed)
Number of components
Mixing ratio by volume
% Solids by volume
Theoretical coverage per gallon*
Temperature resistance (dry)

11.7 lbs.
9 parts Part A: 1 part Part B
560 mil sq. ft.
-70°F to 150°F

10 lbs.
9 parts Part A: 1 part Part B
480 mil sq. ft.
-70°F to 150°F

Application temperatures
 Ambient Air
 Coating Material
Dry film thickness per coat

2-3 mils (50-75 microns)

Minimum Maximum
°F 1°F
°F 1°F
40°F 90°F
0 90%
4-6 mils (100-105 microns)

Wet film thickness per coat

6-9 mils (150-225 microns)

13- mils (325-500 microns)

Shelf Life(@ 40-90°F)
Drying time
 Set to touch
 To recoat
Final Cure
 Nonimmersion Service
Flash Point (Pensky-Martens)
 Part A
 Part B
Pot Life

Part A - 1 year; Part B - 6 mos.
at 30°F(-1°C) at 50°F(10°C)
 2 hours 1 hour
 16 hours 8 hours
 ** 14 days
16 hours 16 hours

Part A - 1 year; Part B - 6 mos.
 at 70°F(21°C) at 90°F(32°C)
 30 min 15 min
 3-4 hours 2 hours
 7 days 3-4 days
 8 hours 3 hours

*Note: actual coverage rate will vary depending upon material losses during mixing and application, and upon type and condition of surface to be coated. Allowance must be made for losses when estimating material requirements
**At low temperatures final cure of HJ-4945 and HJ-4950 Finish can be accelerated by use of catalyst.



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