M3P Overcoat

Highly breathable mineral silicate/acrylic hybrid coating for recoating elastomeric and silicone-based paints. Natural appearance, durable coating to preserve new concretes structures.

Where to use:

Over properly prepared silicone and elastomeric coatings; masonry paint, and new concrete.

How to apply:

Brush or roller applied. Additional Information

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.
  • Technical Data
  • Data Bulletin
  • CSI Spec
  • Competition
  • Curing
  • FAQs
  • Safety Data Sheet
  • Color Card
  • Coating Selector

Physical state & appearance

 

Thick liquid emulsion, natural

Base

 

Aqueous

pH

 

11.2

Percent solids by weight

 

51%

Viscosity

ASTM D562

95 - 105 KU – paint paddle

Density of liquid coatings

ASTM D1475

9.4 lbs./gal

Drying time

 

1 hour @ 65ºF – dry to touch

Fungus resistance

Fed. Spec. TT-P-19D

No growth

Accelerated weathering – QUV

ASTM G154

2000 hours –

UV-B cycled with condensation - no effect

Hiding power of coating @ 5 mils.

ASTM D2805

Excellent

Water vapor transmission

ASTM D6490

71% WVT

Water vapor transmission – Procedure B

ASTM E96

65 perms

Water penetration and leakage

ASTM E514

100% reduction

Heat stability

ASTM C932

Pass – 2 weeks @ 120ºF

Mud cracking @ 10 mils.

 

None

Vertical

Conproco
Sika
BASF
Sto
Tamms
Keim
Sikagard 670W
Sika Color
Parkcoat
Super Colorcoat
Sealcoat
Thorocoat 200
Thorosheen
Thoro 35
Concrete Coating
232 and 230
Maxicryl 201
Tammosheen
Tammscoat
None
Elastocolor 550W
Thorolastic
Thorogard
Colorflex
Flexcoat
Stolastic 211
Stolastic 212
Tammolastic
None
None
None
None
None
Soldalit TDS
None
None
None
None
Soldalit TDS
None
None
None
None
Soldali-Dilution
Skiaguard 740W
Master Protect H107
None
Baracade 40/100
None
None
None
None
Aquastain T-96
None

Horizontal

Conproco
Sika
BASF
Sto
Tamms
Keim
None
None
Texture Coat 510
None
None
None
None
None
Aquastain T-96
None

Cementitous Products

Product
Minimum Temperature
Minimum to 55° F
55°F – 70° F
70° F and above
Minimum Time to Coat
ISR CM
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
ISR VO
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
ISR AG
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Conpro Set
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Quick Shot
40°
8 Hours
2 Hours
1 Hour
3 to 5 days depending on temperature
Forment (remove forms)
40°
72 Hours
48 Hours
24 Hours
3 to 5 days depending on temperature
Gun Shot LPS
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Injection Grout (remove clay)
40°
24 Hours
24 Hours
24 Hours
3 to 5 days depending on temperature
One Shot 2C
45°
24 Hours
12 Hours
6 Hours
3 to 5 days depending on temperature
Matrix
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Matrix TR
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Repoint
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Plastermix
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Structural Skin
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Conpro One Coat
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Conpro Stucco
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Foundation Coat
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature
Super Seal
40°
12 Hours
4 Hours
2 Hours
3 to 5 days depending on temperature

Liquid Products

Product
Minimum Temperature
Minimum to 55° F
55°F – 70° F
70° F and above
Minimum Time to Coat
Conpro Start
40°
18 Hours
12 Hours
6 Hours
Refer to temperature
ECB
40°
8 Hours
1 Hour
30 Minutes
Dry to touch
Primer
40°
8 Hours
1 Hour
30 Minutes
Color change to orange
Shield MX
40°
24 Hours
18 Hours
12 Hours
Dry to touch
M3P & M3P-X
45°
24 Hours
18 Hours
12 Hours
Dry to touch
M3P Overcoat
45°
24 Hours
18 Hours
12 Hours
Dry to touch
Conpro Lastic
45°
24 Hours
18 Hours
12 Hours
Dry to touch
Color Coat
45°
24 Hours
18 Hours
12 Hours
Dry to touch
Super Color Stain
45°
24 Hours
18 Hours
12 Hours
Dry to touch
Elastideck
45°
24 Hours
18 Hours
12 Hours
Dry to touch
Terra Color
45°
24 Hours
18 Hours
12 Hours
Dry to touch
Terracotta Finish
45°
24 Hours
18 Hours
12 Hours
Dry to touch

Each additional coat of paint, particularly elastomeric and silicon-based coatings, reduces vapor transmission of the wall system.  This can lead to deterioration in the wall because the moisture naturally generated from inside is not able to escape as designed.  Each additional coating application can further exacerbate the problem.      

M3P Overcoat is a highly permeable coating that is formulated to bond tenaciously to elastomeric coatings, as well as acrylic and silicone paints.  M3P Overcoat passes ASTM E514 (100% reduction of water penetration and leakage).               

M3P Overcoat is a mineral silicate-based chemistry with the addition of an acrylic component.  The addition of the acrylic is to create adhesion between Overcoat and a previously applied coating. Silicone and elastomeric coatings reduce the breathability. Application of M3P Overcoat produces a fresh natural appearance without changing water vapor transmission.

How to use this chart

Choose the 3 or 4 most important characteristics from the Performance Criteria. Determine which product is best suited to the specific application by adding the value numbers for each product and comparing the totals.

5 = Best Available; 4 = Excellent; 3 = Above average; 2 = satisfactory; 1 = Not a characteristic of the product.

PERFORMANCE CRITERIA – VERTICAL APPLICATIONS

 
M3P 
M3P Overcoat
Conpro Lastic
Color Coat
SuperColor Stain
Terra Color
Breathable/Vapor transmission
5
5
3
3
4
3
Flexible
1
1
5
2
2
2
Weather and Water Protection
4
4
5
3
3
3
Long-Term Durability
5
4
4
3
3
3
Carbonation Mitigation
5
5
5
3
2
3
Fade Resistance
5
5
4
4
4
4
Crack Bridging
1
1
5
1
1
1
Dirt Pick-up
5
5
3
4
5
4
Stain Resistance
5
5
3
4
5
4
Abrasion Resistance
2
2
4
4
4
4
Fugus and Mildew Resistance
5
5
4
4
4
4
Maintenance Requirement
5
5
4
3
4
3
Opacity / Hiding Power
2
4
5
4
3
4

M3P: An inorganic mineral silicate based paint that provides long-term protection and water repellency without changing the natural appearance of the substrate.
Best Suited: Protection from water and carbonation for structures that are difficult to maintain or impractical to recoat in the future. Provides a natural “not painted” appearance. Use when the object is to blend the color of the substrate to be more uniform

M3P Overcoat: Highly breathable hybrid mineral silicate/acrylic coating for application over painted or unpainted surfaces providing a natural non-gloss finish.
Best Suited: Previously painted substrates, particularly silicone and elastomeric coatings which after multiple application reduce vapor transmission to low levels. On unpainted surfaces to preserve natural appearance while hiding significant color variations in the substrate.

Conpro Lastic: An elastomeric waterproof breathable membrane for vertical exterior surfaces.
Best Suited: Structures that require a membrane waterproofing treatment because of cracks, mortar joints, porosity and other physical characteristics that allow water, carbonation and other contaminants into the substrate.

Color Coat: A water-based acrylic coating for concrete and masonry substrates.
Best Suited: Ideal for weather protection of concrete and stucco. High vapor transmission makes this coating well suited for nosing and underside of balconies. Good performance to cost ratio.

Super Color Stain: A penetrating opaque water-based stain that provides uniform color to concrete and masonry.
Best Suited: Horizontal and vertical surfaces that require water repellency as well as uniform color.

TerraColor: Formulated to match colored glaze finishes.
Best Suited: Repairing and restoring terracotta and brick.

PERFORMANCE CRITERIA – HORIZONTAL APPLICATIONS

 
Elastideck
SuperColor Stain
Breathable/Vapor transmission
4
4
Flexible
5
2
Weather and Water Protection
5
3
Long-Term Durability
3
3
Carbonation Mitigation
5
2
Fade Resistance
4
4
Crack Bridging
5
1
Dirt Pick-up
2
5
Stain Resistance
2
5
Abrasion Resistance
4
4
Fugus and Mildew Resistance
4
4
Maintenance Requirement
4
4
Opacity / Hiding Power
5
3

Elastideck: A flexible, breathable waterproof membrane for horizontal surfaces.
Best Suited: Balconies, walkways and slab -on-grade surfaces. Excellent for pedestrian and light vehicular traffic.

Super Color Stain: A penetrating opaque water-based stain that provides uniform color to concrete and masonry.
Best Suited: Apply to Elastideck in the same color to provide resistance to dirt pick up and staining.

THINGS YOU SHOULD KNOW WHEN CHOOSING A COLOR AND COATING

The actual color of the coating and stain may vary from the color samples in this card.
Always order a wet sample to be applied to the intended substrate. Allow to cure for a minimum of 24 hours before evaluating.
Stains are generally used in a color similar to the substrate and tend to be more natural looking compared to paints.
Paints are generally used to change the color of the substrate.
Elastomeric coatings are used to waterproof substrates that have movement (cracking or when carbonation is a concern).
The curing rate will affect the final color of Conpro Stucco. Substrate absorption, temperature, wind, moisture and the changing angle of the sun or obstructions that block the sun while curing will contribute to color variation of cementitious coating.
Always apply a sample of the material to the structure to determine actual coverage and the degree of adhesion (ASTM D3359). Allow one week curing before conducting adhesion test.
Plastermix applied to concrete prior to a coating will dramatically improve the overall appearance by creating a uniform, bug-hole free surface.

Untreated CMU surface

Color Coat on CMU

One Coat

Two Coats

M3P Overcoat on CMU

One Coat

Two Coats

M3P on CMU

One Coat

Two Coats

Super Color Stain on CMU

One Coat

Two Coats

Conpro Lastic on CMU

Two Coats