ProTXcoat 100MRP

Metal Repair Paste

Two Component Epoxy Engineering Repair Compound

100MRP is a high performance multi-purpose synthetic metal repair compound specifically developed for metal repairs requiring good mechanical strength combined with easy machining properties.

100MRP is formulated on a complex range of epoxy resins combined with a polyamino curing system reinforced with a phosphor steel alloy to enhance the corrosion and chemical resistance of the whole system.

100MRP can be applied to any damaged component in one easy application and is ideal for repairing worn shafts, oversized bearing housings, cracked cases and blocks, damaged flanges, sloppy keyways and scored rams.

Before proceeding, please read the following information carefully to ensure that the correct application procedure is fully understood.

Technical specifications

Heavy contamination due to oil or grease must first be removed using MEK (Methyl Ethyl Ketone)

All loose material, rust and surface contaminants, including existing coatings, must be removed and the surface roughened by using an angle grinder, needle gun or abrasive blasting. Where grinding or needle gunning is used, the surface should be cross-scored to improve adhesion. Care must be taken, when angle grinding, to avoid polishing rather than roughening metal surfaces. Where possible, abrasive blasting is the preferred surface preparation, especially in fluid flow repairs.

For the best results abrasive blast clean all surfaces to a minimum Sa2½ to Sa3 with a blast profile of 75 – 125 microns

Surfaces should finally be carefully degreased using MEK. Cloths should be frequently changed to avoid spreading contamination. On deeply pitted surfaces or porous castings, MEK should be worked into the surface by brush and washed off using excess cleaner.

Parts (for example, threads or bearing surfaces) which must remain in position during application but must not adhere to 100MRP must be coated with Release Agent prior to application of the 100MRP

100MRP is a two component solvent free material comprising base and activator components which must be mixed together prior to use.

Measure 3 volumes of base component and 1 volume activator component onto a clean mixing board or other suitable surface. The two components should then be thoroughly mixed until completely streak free.

The mixed material should be used within 25 minutes of mixing at 20°C (68°F). This time will be reduced at higher temperatures and extended at lower temperatures.

The mixed material should be pressed firmly onto the prepared area, working the material into any cracks and surface defects. When 100MRP is being used to bond two surfaces together, both surfaces should be coated with the material. The two pieces should then be pressed firmly together and clamped in position until the product has set, any excess material squeezed out should be scraped away before the 100MRP. begins to cure.

When Reinforcing Tape is being used to strengthen the repairs the tape should either be impregnated with 100MRP or the tape should be layed over the 100MRP. surface and stippled into the material before it cures, then additional 100MRP applied over the surface.

Once 100MRP. has reached ‘initial set’ the material can be separated from the surfaces treated with Release Agent. Once 100MRP has cured for a minimum of 2 hours at 20°C (68°F), sanding, grinding and machining etc. can be carried out using standard engineering practice.

When machining 100MRP a typical Lathe set up would be:

  • Surface Cutting Speed 200 ft/minute
  • Feed Rate (roughing) 50 thou/rev (finishing) 10 thou/rev
  • All equipment must be cleaned IMMEDIATELY after use, with MEK.

Volume Capacity: 410cc (25cu ins) per kilo

Detailed working recommendations are available from the Technical Centre on request.

Mixing RatioBaseActivator
31 By Volume
51 By Weight
AppearanceBaseGrey Paste
ActivatorLight Grey Paste
Drying & Cure Times at 20°C(68°F)Usable Life25 minutes
Initial Set60 minutes
Machining2 hours
Full Mechanical3 days
Volume Solids100%
Shelf LifeUse within 5 years of purchase. Store in original sealed containers at temperatures between 5°C (40°F) and 30°C (86°F).
Temperature ResistanceDry Heat200°C
Intermittent wet120°C
Wet immersion70°C
Food ContactMeets USDA requirements for incidental food contact. Meets FDA requirements CFR 21.175.300 for food contact.

Canadian Food Inspection Agency – Accepted Product.

Compressive Strength 1090kg/cm2 (15500 psi) ASTM D 695

Corrosion Resistance 5000 hours ASTMB117

Flexural Strength 700kg/cm2 (10000 psi) ASTM D 790

Hardness (Rockwell R) 100 ASTM D785

Heat Distortion 90°c (195°F) / ASTM D648 / (Post Cured 24 hrs at 100°C/212°F)

Nuclear Decontamination Excellent BS4247 Part 1
Tensile Shear Adhesion 175kg/cm2 (2500 psi) / ASTM D1002 / (Grit Blasted Steel)
Coverage Rates 1kg (2.2lb) of fully mixed product will give the following coverage rates –

  • 0.406m² at 1mm 4.3ft² at 40mil
  • 0.203m² at 2mm 2.2ft² at 80mil
  • 0.135m² t 3mm 1.45ft² at 1/8”
  • As long as normal good practice is observed 100MRP can be safely used.
  • Protective gloves should be worn during use.
  • A fully detailed Safety Data Sheet is either included with the material or is available on request.

Supplied in 1kg, 3kg and 30kg packs

The information provided in this Product Data Sheet is intended as a general guide only and should not be used for specification purposes. The information is given in good faith but we assume no responsibility for the use made of the product or this information because this is outside the control of the company. Users should determine the suitability of the product for their own particular purposes by their own tests.