Inorganic Hybrid Zinc Rich Protective High Temperature Primer Supplier in China
Inorganic Hybrid Zinc Rich Protective High Temperature Primer Coating paint coating manufacture Shenzhen China  
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Zinc primer.htm

Zinc-rich Ethyl Silicate Based Coating
Zinc Silicone Primer Heat Resistant to 500F
Zinc Rich Epoxy Primer
Zinc Rich Epoxy Cold Galvanising Coating

Zinc Phosphate Primer
Zinc Phosphate High Build Anticorrosive Primer-Finish
Zinc Ethyl Silicate Primer
Zinc Chromate metal Primer
Weldable Modified Zinc Ethyl Silicate Pre-fabrication Primer
Two-component Zinc Rich Epoxy Primer
Surface Tolerant Reinforced Inorganic Zinc Primer

Solvent-borne Self-curing Inorganic Zinc Silicate Primer
Reinforced Inorganic Zinc Primer
Chlorinated Rubber Zinc Rich Coating

Epoxy Zinc Phosphate Iron Oxide Primer
Epoxy Polyamide Anticorrosive High Performance Primer

Fast Drying Low VOC Zinc Rich Epoxy Primer

Inorganic Hybrid Zinc Rich Protective High Temperature Primer
Quick Dry High Performance Zinc Phosphate Primer
Free Low VOC Rreinforced Inorganic Zinc Primer
Solvent-borne Self-curing Inorganic Zinc Silicate Coating



A inorganic hybrid zinc-rich high temperature primer, formulated to withstand continuous operating temperatures to 1000°F (538°C) with peaks to 10癋 (649癈) when topcoated with HJ-225N.
HJ-881 Contains 85% zinc in the dry film for long term galvanic corrosion protection when applied to a properly prepared surface. This primer can be used by itself in uninsulated service when temperatures are below 800癋 or with a Honest joy high temperature finish coat when service conditions exceed 800癋 and/or surfaces are insulated.
NOTE: HJ-881 meets the requirements of ASTM D 5 Type II and contains less than 0.0002% lead and can be classed as lead free.
Recommended Uses
HJ-881 is recommended for exposed steel in high temperature exterior service.

  1. • Stacks, Breechings, Boiler Casings.
  2. • Chemical Plant and Refinery Equipment.
  3. • Heaters, Cat-crackers, Reformers.
  4. • Structural steel, Reaction Vessels, Tanks
  5. • Furnaces, Kilns, Ovens.
  6. • Piping, Pumps, Manifolds.
  7. • Process Vessels, Heat exchangers.
    1. • Preconstruction and Fabrication Priming


  1. • Corrosion control mechanism via sacrificial cathode with galvanic protection.
  2. • Abrasion Resistance, the film improves in hardness and adhesion upon aging and weathering exposure
  3. • Rapid Curing - permitting recoating within 12-16 hours except under unusual atmospheric conditions. (See curing section for further details)
  4. • Pot Life - Working time of 6-8 hours (at 70-90癋) can be expected after mixing.
  5. • Resistant to hydrocarbon and many other organic chemicals.
  6. • Heat resistant up to temperatures of 1000癋

Not Recommended for
HJ-881 is not recommended for exposures to:

  1. • Acids, alkalis and salts which have a pH range outside that of 5-10.
  2. • Salts (satisfactory with topcoats)
  3. • Chlorinated solvents which readily hydrolyze to form hydrochloric acid
  4. • Crude oils with acid numbers above 0.4 or hydrogen sulfide content above 300 PPM

Surface Preparation
Remove all grease and oil by solvent cleaning per Specification SSPC-SP1, “Solvent Cleaning.” Use Honest joy 170 “Cleaning Solvent”.
High Temperature surfaces, for best results all surfaces should be free of all foreign matter. Abrasive blast all surface per Steel Structures Painting Council Specification SSPC-SP10, “Near White Blast,” or per NACE Specification No. 2 with a 1.5 – 2.0 mil profile depth in all blasted surfaces.
In preparing steel surfaces, follow the procedure outlined below.

  1. 1. Remove all flux, splatter and slag left from welding.
  2. 2. Grind all rough welds until smooth and break sharp edges.
  3. 3. Remove any grease, oil or dirt by solvent cleaning per Specification SSPC-SP1, “Solvent Cleaning.”
  4. 4. Sandblast per specifications outlined above.
  5. 5. Remove all remaining abrasive from surface by brush or air blast.
  6. 6. Coat freshly-blasted surfaces as soon as possible. (See Application Guide Lines Section for Instructions). DO NOT allow the HJ-881 to be exposed to rain before curing takes place. DO NOT wash freshly blasted surface with solvents.

HJ-881 is supplied in 3 parts, consisting of Part A liquid Base, Part B catalyst and Part C Zinc additive that must be mixed prior to application. Mix zinc component (C) slowly into vehicle Base (A) using an explosion-proof Jiffy Mixer. Add zinc (C) to liquid base (A) only. DO NOT reverse mixing procedure, then add catalyst (B) and mix thoroughly, until free of lumps. Pour mixture through 30 mesh screen to remove any lumps. When mixed, HJ-881 should be continuously agitated. Do not agitate so vigorously that air becomes trapped in the coating. Use mixed product within the working pot life.
Pot Life
The pot life of HJ-881 is 6-8 hours after mixing. Always maintain continuous agitation of the mixed components until coating is completely used up. DO NOT mix more material than can be applied within 30 to 40 minutes of pot life or before gassing or separation of liquid and solids occurs.
Application Guidelines
Note: Apply HJ-881 Inorganic Zinc High Temperature Primer via spray application only. Apply HJ-881 at 4.0 - 5.0 mils of dry film thickness allowing to cure completely. Note curing time will vary with film thickness and when air movement and ventilation are restricted or low temperatures or humidity’s are encountered. After curing is complete (refer to “curing time”), pressure wash with clean fresh water at 3,500 psi using a rotating nozzle to remove any and all zinc salts before application of the Thurmalox high temperature coating. Allow the HJ-881 to dry completely, followed by a spray application of a mist coat of Thurmalox high temperature coating, followed by a full coat of Thurmalox high temperature coating at 2.5 to 3.0** mils of dry film thickness. Do not allow freshly applied HJ-881 to be exposed to rain or water until coating has cured completely.
Apply HJ-881 only by spray. Brush only when coating is difficult-to-spray such as small areas or small parts. Coating dry film thickness should be 3.0-5.0 mils maximum (5-7 wet mils).
SPRAY APPLICATION: Apply in even coating with parallel passes, overlap each pass 50 percent. Pay special attention to welds, sharp edges, rivets, bolts, etc., to insure proper film thickness.
Flush all spray equipment with Honest joy 155 Thinner to remove any moisture that may be in the line or spray equipment prior to use. Continuously mix liquid with an explosion-proof power mixer.
Application Equipment
Conventional Spray Equipment: Use material as supplied.
As a guide only...

Spray Gun


Air hose


*Fluid hose

3/8” (I.D.)

Air cap




Pot pressure

10- lbs.

Atomizing pressure

30-40 lbs.

Needle adjustment

Full open

Distance from work


Airless Spray Equipment: Use material as supplied.
As a guide only...

------ Spray Gun


Tip Size

.011 to .021 (0.38-053mm)


28:1 or larger ratio pump

Fluid Pressure

1,600psi (112kg/cm2) minimum

Fluid Hose*

3/8” (9mm) maximum length of 50ft.

Air Press. To Pump

40-50 lbs

*Smaller hose diameters, or hose lengths greater than 25 feet may make it necessary to increase pressure.
Work Stoppage: Do not allow HJ-881 to remain in hoses, gun or spray equipment; thoroughly flush all equipment with HJ-155 THINN. If prolonged work stoppages occur a fresh batch of HJC-837 should be used. NOTE: Once HJ-881 is mixed it should not be resealed.
Recommended Topcoats
HJ-881 Inorganic Zinc Rich High Temperature Primer can be top coated with select Honest joy High Temperature Coatings. Allow coating to dry completely before application of any of these recommended topcoats.

Used by itself….

HJ-881 Primer

5.0-6.0 mils
(125-150 microns)

Or in a System

Primer Coat

HJ-881 Primer Coat

2.5-3.0 mils
(67- 75 microns)

Finish Coat

HJ-225N (Under Insulation)

4.0 – 6.0 mils
(100 -150 microns)

(Or Uninsulated)
Thurmalox 230/230C
(color stability to 1000° F)

2.0-2.5 mils
(37-50 microns)

HJ-881 is supplied at spray viscosity and normally needs no thinning. NEV use more than 1
pint of Honest joy 155 Thinner per gallon. When rough film or dry spray occurs due to fast evaporation during hot weather or high winds adjust spray equipment to apply an even wet coat with minimum overspray. Note: Use of other thinners not approved by Honest joy may hinder product performance and void product warranty.
Curing Time
HJ-881 is self-curing and requires moisture to complete the curing reaction. The drying time to film insolubility is dependent on film thickness, temperature, relative humidity, and air circulation. Flow of air over the surface has a pronounced effect in reducing drying time. See Technical Data section for curing data. Water misting is beneficial when humidity drops below 30% to accelerate the curing mechanism.
Store in a cool, dry place, preferably between 40°F - 80°F (4°C - 38°C). Do not store above 100°F or in a relative humidity greater than 50 %.
Clean up
Clean spray equipment, brushes, spillage, etc. with Honest joy 155 Thinner as soon after use as practical to prevent hardening of HJ-881. Hardened material can be removed from equipment with a 10% solution of caustic soda. Note: Caustic solutions will attack aluminum.
The coating, usually 30 minutes after application, is resistant to water, rain, or condensation.
The film is not subject to ultraviolet degradation and is extremely serviceable in normal atmospheric weathering exposures.
The cured vehicle is insoluble in a large variety of organic solvents and is serviceable in exposures of fumes, splash, and spills of oils and solvents.
In marine coastal exposures the presence of salt and industrial contaminants tends to accelerate the sacrificial reaction of the zinc metal in the film. The use of appropriate topcoats reduces the rate of zinc sacrifice thus increasing the protective life of the coating system.
Acid and alkali exposures are aggressive to HJ-881 films and in such exposures, the use of Honest joy topcoats, are recommended. The topcoats prevent chemical attack of the zinc and the zinc in turn prevents under-film corrosion.
Where scheduling is critical, film hardening can be accelerated by an application of water spray or low pressure steam. At very low humidifies more than one water application with drying periods in between may be necessary. After such water applications top coating may proceed as soon as the surface is dry.
Precautionary Information
WARNING: FLAMMABLE LIQUID AND VAPOR. VAPOR HARMFUL. CAUSES EYE IRRITATION. VAPOR HARMFUL. Keep away from heat, sparks and flame. VAPORS MAY CAUSE FLASH FIRE. Use only with adequate ventilation. Do not breathe vapors or spray mist. Ensure fresh air entry during application and drying. If you experience eye watering, headache or dizziness or if air monitoring demonstrates vapor/mist levels are above applicable limits, wear an appropriate, properly fitted respirator during and after application. Follow respirator manufacturer's directions for respirator use. Close container after each use. Avoid contact with eyes. Wash thoroughly after handling. See Material Safety Data Sheet (MSDS) for complete precautionary and disposal information.
If instructions and warning cannot be strictly followed, do not use this product.
Technical Data



Generic Type

Inorganic Hybrid High Temperature Coating





Number of components


Operating temperature range**

Ambient to 1000°F (538°C)

Maximum temperature resistance intermittent*

10°F (649°C)

Surface temperature at time of application

32-150°F (0-66°C)

Zinc content in dry film

85% ± 2

Percent (%) Solids by volume

65% ± 2

Dry film thickness per coat

4.0-5.0 mils (100.0 – 125.0 microns)

Wet film thickness per coat

5.0-7.0 mils (125-179 microns)

Theoretical coverage per gallon**

1040 mil. Sq. ft. per gallon

25.5 sq. m. per liter

Curing Schedule


Dry to handle

Dry to topcoat

RH above 50%

RH 30-50%


4-6 hours

8-12 hours


6-8 hours

12-24 hours


12-16 hours

Up to 48 hours


16-24 hours

48 hours

Weight per gallon

22.6 lbs.

Flashpoint (Seta Flash)

57°F (14°C)

Zinc Dust


Pot Life

6-8 hours

Shelf Life – Part A (base)
Part B (catalyst)
Part C (zinc)

6 months at 70°F
6 months at 70°F
6 months at 70°F

VOC ( Volatile Organic Compounds)

1.94 lbs/gal. (232 g/l)

*HJ-881 must be topcoated with a Honest joy high temperature resistant coating when service temperature is above 800°F. Use HJ-225N topcoat under Insulation in all temperature ranges.
**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
Warranty Honest joy protective coating products are expressly warranted to meet applicable technical and quality specifications. The Technical data contained herein are accurate at the date of issuance but are subjected to change without prior notification. No warranty of current accuracy is hereby given or implied. User must contact Honest joy to verify correctness before ordering. Honest joy assumes no responsibility for coverage, performance or injuries resulting from handling or use and LIABILITY, IF ANY, SHALL BE LIMITED TO PRODUCT REPLACEMENT.


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