Devcon Plastic Steel 5 Minute Putty 500g


£72.21 ex VAT £86.65 inc VAT

Brand: Devcon
Product Model:
In Stock

  • Hardens in one hour
  • Mixes, applies, and cures at temperatures as low as 40°F
  • Cures to a tough, steel-filled material
  • Can be machined, drilled, tapped, or sanded
  • Listed under NSN stock #8030-00-229-8734
  • Open Time: 5 Minutes
  • Gap Fill: .0625″ – .075″
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Devcon 10241 – Plastic Steel 5 Minute Putty – 1 x 500 g

  • Stock No: 10241
  • Package Size: 500g


A fast curing, steel-filled epoxy putty for dependable emergency repairs and quick maintenance work.

Recommended Applications

  • Repairs cracks and breaks in equipment, machinery or castings
  • Patches and rebuilds blow holes or pits in castings
  • Rebuilds worn equipment, pump and valve bodies
  • Restores bearing journals and races


  • Typical Physical Properties
  • Colour Dark Grey
  • Mix Ratio by Volume 1:1
  • Mix Ratio by Weight 1.7:1
  • % Solids by Volume 100
  • Pot life at 25oC/ mins 5
  • Specific Volume CC/Kg 455
  • Cured Shrinkage cm/cm 0.009
  • Specific Gravity 2.2
  • Temperature resistance / oC Dry 93oC
  • Coverage 909cm2/Kg @ 5mm
  • Cured Hardness / Shore D 86 D
  • Dielectric Strength KV/mm 1.18
  • Adhesive Tensile Shear / MPa 14
  • Compressive Strength MPa 72
  • Coefficient of Thermal Expansion x10-6 – 61cm/cm/oC
  • Thickness per Coat / mm As Required
  • Functional Cure Time /Hours 16
  • Recoat Time /Hours 1
  • Mixed Viscosity /cps (where applicable) Putty

Chemical Resistance

  • 7 days room temperature cure (30 days) – Testing carried out 30 days immersion at 21oC
  • Ammonia Fair Methylene Chloride Poor
  • Cutting Oil Very Good Sodium Hypochlorite 5% (Bleach) Fair
  • Isopropyl Alcohol Poor Sodium Hydroxide 10% Fair
  • Gasoline (Unleaded) Very Good Sulphuric Acid 10% Fair
  • Hydrochloric Acid 10% Fair Xylene Fair
  • Methyl ethyl Ketone (MEK) Poor
  • Excellent = +/- 1% weight change
  • Very Good = +/- 1-10% weight change
  • Fair = +/- 10-20% weight change
  • Poor = > 20% weight change


Cure A 12.7mm thick section of Devcon Plastic Steel® Putty (SF) will harden at 21ºC in 1 hour. The material will be fully cured in 16 hours at which time the material can be machined, drilled or painted. The actual cure time of epoxy is determined by the mass used and the temperature at the time of repair.

Surface Preparation

Proper surface preparation is essential to a successful application. The following procedures should be considered:

  • All surfaces must be dry, clean and rough.
  • If surface is oily or greasy use Devcon Fast Cleaner 2000 Spray / Cleaner Blend 300 to degrease the surface.
  • Remove all paint, rust and grime from the surface by abrasive blasting or other mechanical techniques.
  • Aluminium repairs: Oxidation of aluminium surfaces will reduce the adhesion of an epoxy to a surface. This film must be removed before repairing the surface, by mechanical means such as grit-blasting or chemical means.
  • Provide a “profile” on the metal surface by roughening the surface. This should be done ideally by grit blasting (8-40 mesh grit), or by grinding with a coarse wheel or abrasive disc pad. An abrasive disc may be used provided white metal is revealed. Do not ‘feather edge’
  • epoxy materials. Epoxy material must be ‘locked in’ by defined edges and a good 3 – 5 mill profile.
  • Metal that has been handling sea water or other salt solutions should be grit blasted and high pressure water blasted and left overnight to allow any salts in the metal to ‘sweat’ to the surface.
  • Repeat blasting may be required to ‘sweat out’ all the soluble salts. A test for chloride contamination should be performed prior to any epoxy application. The maximum soluble salts left on the substrate should be no more than 40 p.p.m. (parts per million).
  • Chemical cleaning with Devcon Fast Cleaner 2000 Spray / Cleaner Blend 300 should follow all abrasive preparation. This will help to remove all traces of sandblasting, grit, oil, grease, dust or other foreign substances.
  • Under cold working conditions, heating the repair area to 38ºC – 43º C immediately before applying any of Devcon’s Metal-filled Epoxies is recommended. This procedure dries off any moisture, contamination or solvents and assists the epoxy in achieving maximum adhesion to the substrate.
  • Always try to make the repair as soon as possible after cleaning the substrate, to avoid oxidation or flash rusting. If this is not practical, a general application of FL-10 Primer will keep metal surfaces from flash rusting
  • Mixing Plastic Steel 5 Minute Putty is formulated to be a dense mix that can be applied easily to overhead and vertical surfaces without running or sagging. Add the hardener to resin and mix thoroughly on a mixing board using a spatula. Do not mix in the containers. Remember you only have a 5 minute pot life so mix for 1 minute.


For best results, product should be kept and applied at room temperature. Plastic Steel 5 Minute Putty can be applied when temperatures are between 13ºC and 52ºC. Spread the putty over prepared surface with a putty knife. Press firmly to ensure maximum surface contact and avoid trapping air. To bridge large gaps or holes use fibreglass, expanded metal or other mechanical fasteners.

Shelf life & Storage

A shelf life of 3 years from date of manufacture can be expected when stored at room

temperature (22ºC) in their original containers


For complete safety and handling information, please refer to Material Safety Data Sheets

(MSDS) prior to using this product.


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


All information on this data sheet is based on laboratory testing and is not intended for design purposes. ITW Devcon makes no representations or warranties of any kind concerning this data.

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