Devcon Plastic Steel Putty (A)


Original metal-filled epoxy putty used for hundreds of routine maintenance, production, and tooling applications. Patch and repair areas where welding or brazing would be undesirable or impossible.

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0.5 kg
not available

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A steel-filled epoxy putty that cures at room temperature and is designed for filling, rebuilding, and bonding metal surfaces.

Intended Use:Patching and repairing areas where welding or brazing would be undesirable or impossible.

Product features:

  • Applies easily to vertical surfaces
  • Machinable to metallic finish
  • Bonds to aluminum, concrete, and many other metals
  • Resistant to chemicals and most acids, bases, solvents, and alkalis

Not recommended for long term exposure to concentrated acids or to organic solvents.

Typical Physical Properties:
Technical data should be considered representative or typical only and should not be used for specification purposes.
Cured 7 days @ 75° F

Adhesive Tensile Shear 2800 psiMix Ratio by Volume2.5:1
Coefficient of Thermal Expansion48 [(in)/(in) x °F)] x 10(-6)Mix Ratio by Weight 9:1
ColorGreyMixed ViscosityPutty
Compresive Strength8260 psiModulus of Elasticity8.5 x 10(5) psi
Coverage/lb 48 sq. in @ 1/4 in.Pot Life @ 75F45 min.
Cured Hardness85DRecoat Time 2-4 hrs
Cured Shrinkage0.0006 in./in.Solids by Volume100
Dielectric Constant67.5Specific Gravity2.33 gm/cc
Dielectric Strength 30 volts/milSpecific Volume 11.9 in.(3)/lb.
Flexural Strength 5600 psiTemperature ResistanceWet: 120°F; Dry: 250°F
Functional Cure 16 hrsThermal Conductivity1.37[cal/(secxcmx°C)]x10(-3)

Surface Preparation:
1. Thoroughly clean the surface with Devcon® Cleaner Blend 300 to remove all oil, grease and dirt.
2. Grit blast surface area with 8-40 mesh grit, or grind with a coarse wheel or abrasive disc pad, to create increased surface area for better adhesion (Caution: An abrasive disc pad can only be used provided white metal is revealed). Desired profile is 3-5mil, including defined edges (do not "feather-edge” epoxy).
Note: For metals exposed to sea water or other salt solution, grit-blast and high-pressure-water-blast the area, then leave overnight to allow any salts in the metal to “sweat” to the surface. Repeat blasting to “sweat out” all soluble salts. Perform chloride contamination test to determine soluble salt content (should be no more than 40ppm).
3. Clean surface again with Devcon® Cleaner Blend 300 to remove all traces of oil, grease, dust or other foreign substances from the grit blasting.
4. Repair surface as soon as possible to eliminate any changes or surface contaminants.
Working conditions: Ideal application temperature is 55°F to 90°F. In cold working conditions, directly heat repair area to100-110°F prior to applying epoxy and maintain at this temperature during pro.

Mixing Instructions:
1. Add hardener to resin.
2. Mix thoroughly with screwdriver or similar tool (continuously scrape material away from sides and bottom of container) until a uniform, streak-free consistency is obtained.
Intermediate sizes (1,2,3 lb. units): Place resin and hardener on a flat, disposable surface such as cardboard, plywood or plastic sheet. Use a trowel or wide-blade tool to mix the material as in Step 2 above.
Large sizes (25 lb., 30 lb., 50 lb. buckets): Use a T-shaped mixing paddle or a propeller-type Jiffy Mixer Model ES on an electric drill. Thoroughly fold putty by vigorously moving paddle/propeller up and down until a homogenous mix of resin and hardener is attained.

Application Instructions:
Spread mixed material on repair area and work firmly into substrate to ensure maximum surface contact. Plastic Steel® Putty (A) fully cures in 16 hours, at which time it can be machined, drilled, or painted.
For bridging large gaps or holes:
Place fiberglass sheet, expanded metal, or mechanical fasteners between repair area and Plastic Steel® Putty (A) prior to application.
For vertical surface applications
Plastic Steel® Putty (A) can be troweled up to ¼” thick without sagging.
For maximum physical properties:
Cure at room temperature for 2.5 hours, then heat cure for 4 hours @ 200°F.
For ± 70°F applications
Applying epoxy at temperatures below 70°F lengthens functional cure and pot life times. Conversely, applying above 70°F shortens functional cure and pot life.
Allow material to cure for at least 16 hours before machining.

  • Lathe speed: 150 ft/min
  • Cut: Dry
  • Tools: Carbide Top Rake 6° (+/-2°) – Side/Front 8°F (+/-2°)
  • Feed Rate (rough): Travel speed .020 Rough cut .020 - .060
  • Feed Rate (finishing): Travel speed .010 Finish cut .010
  • Polishing: Use 400-650 grit emery paper wet. Material should polish to a 25-50 micro inch.

Store at room temperature, 70 °F.

Qualifies under MIL-PRF-24176C, supersedes DOD-C-24176B SH, Type 1. Accepted for use in U.S. meat and poultry plants.

Chemical Resistance:
Chemical resistance is calculated with a 7 day, room temp. cure (30 days immersion) @ 75°F)

1,1,1-TrichloroethaneVery good Phosphoric 10%Very good
AmmoniaVery good Potassium Hydroxide 20%Very good
Cutting OilVery good Sodium Chloride BrineVery good
Gasoline (Unleaded)Very good Sodium Hydroxide 10%Very good
Hydrochloric 10%Very good Sulfuric 10%Very good
KeroseneVery good Sulfuric 50%Poor
Methyl Ethyl KetonePoor Trisodium PhosphateVery good
Methylene ChloridePoor XyleneFair

Devcon will replace any material found to be defective. Because the storage, handling and application of this material is beyond our control, we can accept no liability for the results obtained.

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