M-CHEM 300 – Acid Resistant Epoxy Novolac 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.

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 dependant on 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 dependant on 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 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 & 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 target wet film thickness of 400-500 microns.
• Once the basecoat has cured sufficiently, (approximately 4 hours at 20°C) apply a topcoat at a target wet film thickness of 400-500 microns.

Airless Spray

Spray application should be carried out by airless spray using a 45:1 ratio pump with an attached hot water pump to heat the spray lines.

• The temperature around the spray lines should be kept around 25-35°C.
• Spray pressure of 3600psi and a tip size of 19-23 thou should be used.
• Use as short a line as possible to maintain product temperature (maximum 8 meters).
• Circulate the product for a short time to achieve temperature equilibrium.
• Stripe coat all edges, joints & corners.
• Once the stripe coat has cured and is capable of being overcoated, apply a basecoat at a target wet film thickness of 400-500 microns.
• Once the basecoat has cured sufficiently, (approximately 4 hours at 20°C) apply a topcoat at a target wet film thickness of 400-500 microns.

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 – 100°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 300 APG PDF
• M-CHEM 300 ACTIVATOR MSDS
• M-CHEM 300 BASE MSDS