M-CHEM 400 – Chemical Resistant High Temperature Coating

• All oil and grease must be removed from the surface using an appropriate cleaner such as MEK or similar type solvent.
• All surfaces must be abrasive blasted to ISO 8501/4 Standard SA2.5 (SSPC SP10/ NACE 2) minimum blast profile of 75 microns using an angular.
• Once blast cleaned the surface must be degreased and cleaned using MEK or similar type solvent.
• All surfaces must be coated before gingering or oxidation.

PLEASE NOTE: Soluble salt contaminated surfaces the substrate must be pressure washed with clean water and checked for salt contamination this process may need to be repeated several times., 

Existing Concrete

• If the concrete surface is contaminated, pressure wash using clean water.
• Once the concrete is dry, lightly abrasive blast or scarify taking care not to expose the aggregate.
• Clean all dust and debris from the surface and prime with M-PRIME 100 – Low Viscosity Epoxy Concrete Primer or M-PRIME 104 – Damp Tolerant Concrete Primer
• Apply either primer at target WFT of 150 microns, leave to cure for 3 hours (20°C) before overcoating.

New Concrete

• Allow new concrete to cure for a minimum of 21 days and treat to remove any surface laitance.
• Check the moisture content of the concrete prior to coating (8% moisture content or below).
• Lightly scarify the surface taking care not to expose the aggregate.
• Clean all dust and debris from the surface and prime with Maxprime 100 low viscosity epoxy primer.
• Apply either primer at 150 microns WFT, leave to cure for 3 hours 20°C before overcoating.

Prior to mixing please ensure the following:

• The base component is at a temperature between 15-25°C.
• Do not apply the material when the ambient or substrate temperature is below 10°C or less than 3°C above dew point.

• Transfer the contents of the Activator unit into the Base container.
• Using a low speed electric paddle mixer, mix the 2 components until a uniform material free of any streaks is achieved.
• Once mixing is complete, use the mixed paste as soon possible.

Use all mixed material within 20-25 minutes at 20°C.

Brush or Roller Applications

• Pour the mixed material into a paint kettle or paint tray (this will maximise the usable life).
• Using a 50mm wide synthetic brush, stripe coat all edges, joints, corners and equipment with the mixed material. The stripe coat must be approximately 100mm wide, at 500 microns wet film thickness.
• Once the stripe coat has cured sufficiently and is capable of being overcoated, apply the 1st coat of mixed product to all surfaces at 500 microns wet film thickness.
• Once the 1st coat of material has cured sufficiently, approximately 8 hours at 20°C, apply a 2nd coat of material to all surfaces at 500 microns wet film thickness.

Spray set up & Application

• Spray application should be carried out by heated plural feed spray rig.
• The temperature of the base component should be kept around 35°C.
• Spray pressure of 3600psi and a tip size of 19-23 thou should be used.
• Using a 50mm wide synthetic brush, stripe coat all edges, joints, corners and equipment with the mixed material. The stripe coat must be approximately 100mm wide, at 400 microns wet film thickness.
• Once the stripe coat has cured sufficiently and is capable of being overcoated, apply MAXCHEM 400 to all surfaces at 1000 microns wet film thickness.

To enhance the properties of this material, post curing will be required.

• Allow the product to cure for at least 4 hours at 20°C.
• Raise the coating and substrate temperature progressively to 60 – 80°C for up to 8 hours.

Post curing will result in improved mechanical, thermal and chemical resistance properties.

Please contact us to discuss your project before purchasing this material to confirm suitability.

• M-CHEM 400 APG PDF
• M-CHEM 400 ACTIVATOR MSDS
• M-CHEM 400 BASE MSDS