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All Categories > Steel / Tank Linings and Coatings > HAR Carbide Putty > Item # - HAR

Item # HAR, HAR Carbide Putty

HAR is a more abrasion resistant putty than SAR, which is used primarily in areas requiring more resistance to fine slurries either in liquid or powder form. Common applications are in coal mills, chutes, ash hoppers or deflector plates in FGD systems.

Features
  • Outstanding resistance to entrained solids and abrasion
  • Very good chemical resistance
  • Excellent temperature and thermal shock resistance
  • Extended pot life
  • Easily built up for thick applications
Inorganic AcidsVery Good
Organic AcidsGood
SolventsGood
AlkalisExcellent
SaltsExcellent
AlcoholsExcellent
HydrocarbonsExcellent
Density1.94
Solids100 percentage
Flexural Strength at 70 ºF20800 psi
Tensile Strength at 70 ºF11700 psi
Tensile Shear at 70 ºF3000 psi
Max. Dry Operating Temperature500 ºF
Operating pH Range1.5 - 14.0
Packaging1 kg unit 
4 kg units
Mixing Ratio2 parts base (B) to 1 part (A) hardener by volume 
2 parts base (B) to 1 part (A) hardener by weight
Pot Life
For a 1 kg. unit, mix at 70 ºF, pot life is approximately 45 minutes. Higher temperatures or larger mass will shorten this time, lower temperatures or smaller mass will extend it. Pot life can also be extended by spreading the mass out to dissipate heat.
ColorGrey
StorageStore in dry area in closed containers between 50 ºF and 110 ºF. Shelf life at these conditions is greater than one year.
Coverage
HAR is a trowel-on rebuilding compound and can be applied up to 250 mils/coat. Thicker applications can be achieved by multiple layers. Theoretical coverage at 40 mils is 31 cubic inches per kg.
Surface Preparation
  • For maximum adhesion, material should be applied to a firm, clean, dry and abraded surface.
  • Best results will be obtained by abrasive blasting the surface.
  • If blasting is impractical, a grinding wheel, needle gun, or very stiff wire brush may be used.
  • Clean greasy, oily or waxed surfaces with suitable solvent before applying material.
Mixing & Application
Mixing
Mix ALL of Part A with ALL of Part B. Mixing may be done on a large mixing board or container large enough to hold both the base and hardener. The selected mixing surface must be clean and dry. Mix the material thoroughly until no streaks of any kind are visible. If materials are cold, warm them to 70 ºF before mixing.

Cleanup
All mixing and applications tools should be immediately wiped or scraped clean when finished with using.

Application
HAR is best applied with a squeegee, trowel or the plastic applicator supplied with the kit. Press material thoroughly into substrate and insure a completely wetted out surface. Build up to the required thickness with a second pass. Large cracks or holes should be bridged with glass or metal cloth. Reinforcement should be overcoated.

For best results, do not apply:
  • When temperature is below 50 ºF.
  • When humidity is over 90%
  • When there is moisture on the surface
  • When surface temperature is not 5 ºF above dew point

Force Curing
Force cures are recommended for severe service conditions as both the physical and chemical properties are enhanced. Force curing should not start until material has firmly set.

Recommended Force Cure Schedule:
  • 1 hour at 250 ºF
  • 4 hours at 180 ºF
  • 8 hours at 120 ºF

Health and Safety
READ AND UNDERSTAND ALL MATERIAL GIVEN IN THE MSDS SHEETS BEFORE USING THE PRODUCT.

HAR DOES NOT CONTAIN ANY FLAMMABLE MATERIAL OF ANY KIND. HOWEVER, THE MATERIAL IS COMBUSTIBLE. IN THE EVENT OF A FIRE, DRY POWDER, FOAM, OR CARBON DIOXIDE FIRE EXTINGUISHERS SHOULD BE USED. FIRE FIGHTERS SHOULD WEAR RESPIRATORS.

USE PROTECTIVE GLOVES AND EYEGLASSES WHEN USING.

USE IN AREAS OF GOOD VENTILATION.
Limited Warranty
All recommendations covering the use of this product are based on past experience and laboratory findings. Methods or conditions of application and use of the product are beyond our control. We assume responsibility only for the uniformity of our product within normal manufacturing balances.