M-CHEM 401 – Acid Resistant High Temperature Coating – Extended Cure

• 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 M-PRIME 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 M-CHEM 401 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 401 – APG PDF
• M-CHEM 401 ACTIVATOR MSDS
• M-CHEM 401 BASE MSDS