M3P Overcoat

Performance Characteristics

• Painted surface compatibility M3P Overcoat was developed to maintain maximum vapor permeability of previously coated structures.
• Versatility M3P Overcoat can also be applied to sound uncoated masonry surfaces in addition to coated surfaces. M3P Overcoat is the preferred potassium silicate product for surfaces with exposed aggregate.
• Breathability Will not decrease MVT.
• Anti-carbonation Mitigates carbonation of concrete.
• Water repellent Siloxane component provides long term protection from water and water borne contaminants.
• Stable Unaffected by UV. Fire-resistant.
• Environmentally friendly Water-based, low odor, low VOC.
• Ease of application Single component, stir and apply.
• Extensive color spectrum 34 standard colors, plus Masonry Restoration standard colors and custom matching.

Surface Preparation

• Remove loose and deteriorated material, laitance, dirt, dust, oil, and any surface contaminants that will inhibit proper penetration.
• Surface must be dry and frost-free.
• New concrete or repairs must cure a minimum of 7 days prior to application.

Priming

• No priming is required.

Mixing

• Stir or mechanically mix using a low speed drill (400 – 600) until homogenous.
• Mix pails from different batches when an entire surface is visible.

Application

• Apply a test sample in an inconspicuous area to determine suitability.
• Always check adhesion by using a Tape test such as ASTM D3359.
• Roll or brush apply a uniform 7 mils wet coat. Allow to dry a minimum of 12 hours. Apply a second uniform 7 mils wet coat.
• Substrate temperature must be above 45°F.
• Ambient temperature must be above 45°F for the entire curing period.
• For roller applications use a 3/8 – 1/2 inch synthetic nap roller depending on texture of substrate.
• Work to pre-determined breakpoints in the structure.
• Maintain a wet edge.

Curing

• Protect from moisture for 24 hours.

Clean Up

• Clean tools and equipment with water. Clean adjacent areas with water before material dries.

Coverage/Yield

• 170 – 300 ft²/gal
• 100 – 180 ft²/gal for split block or rough surfaces.

Product Handling

• Packaging 5 gallon containers.
• Shelf Life 18 months in unopened containers.
• Storage Protect from freezing. Transport and store in cool, clean, dry conditions in unopened containers. High temperature will reduce shelf life.

Limitations

• Do not apply if precipitation is forecast within 24 hours of application.
• Do not apply in strong winds.
• Do not apply to frozen surfaces.
• Do not apply if temperature of substrate is below 45°F.
• Do not apply if ambient temperature is below 45°F.

Health and Safety

• Product is alkaline.
• Do not ingest.
• Avoid contact with skin and eyes.
• Refer to Safety Data Sheet (SDS) for additional information.

First Aid

• In case of skin contact, wash thoroughly with soap and water.
• For eye contact, flush immediately with a high volume of water for at least 15 minutes and contact a medical professional.
• For respiratory problems, remove person to fresh air.
• If respiratory difficulty persists, contact a medical professional.

Disposal

• Dispose of material in accordance with local, state, and federal regulations.