M-CHEM 500 – Erosion & Chemical Resistant Epoxy 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 take several moisture readings and prime with M-PRIME 100 – Low Viscosity Epoxy Concrete Primer or M-PRIME 104 – Damp Tolerant Concrete Primer dependent on the moisture readings obtained.
• Apply M-PRIME 100 or M-PRIME 104 at a target wet film of 150 microns, allow to cure before overcoating.
• For very porous surfaces a second coat of primer may be required.

New Concrete

• Allow new concrete to cure for a minimum of 21 days, lightly abrasive blast or scarify to remove any surface laitance.
• Clean all dust and debris from the surface and take several moisture readings and prime with M-PRIME 100 – Low Viscosity Epoxy Concrete Primer or M-PRIME 104 – Damp Tolerant Concrete Primer dependent on the moisture readings obtained.
• Apply M-PRIME 100 or M-PRIME 104 at a target wet film of 150 microns, allow to cure before overcoating.
• For very porous surfaces a second coat of primer may be required.

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 5°C.

• 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 after mixing.
• Use all mixed material within 60 minutes at 20°C.
• For applications that require additional pot life we suggest M-CHEM 101 – Chemical Resistant Epoxy Coating – Extended Cure.

Brush & Roller

• Pour the mixed material into a paint kettle or paint tray (this will maximise the usable life).
• Stripe coat all edges, joints & corners.
• Once the stripe coat has cured and is capable of being overcoated, apply a basecoat at a minimum wet film thickness 400 microns.
• Once the basecoat has cured sufficiently, approximately 10 hours at 20°C, apply a topcoat at a minimum wet film thickness of 400 microns.

• M-CHEM 500 APG PDF
• M-CHEM 500 ACTIVATOR MSDS
• M-CHEM 500 BASE MSDS