Structural Skin

Base coating for exterior wall systems over CMU, concrete, brick exterior sheathing and plywood.

Where to use:

Base coating for exterior wall systems over block, concrete, brick, exterior sheathing and plywood.

How to apply:

Trowel or spray applied. Additional Information

Performance Characteristics

  • Waterproof barrier Passes ASTM E514.
  • Anti-carbonation barrier Mitigates carbonation of concrete.
  • Durable Resistant to weathering action, excellent freeze/thaw stability and abrasion resistance.
  • Breathability Allows moisture to diffuse, preventing damage from moisture build-up in wall system.
  • Structural When applied to both sides of dry stacked concrete block, forms a structural wall system. IBC approved.
  • Smooth finish Ready for roller, spray and trowel applied decorative coatings such as Conpro Lastic or Conpro Color Coat.

Surface Preparation

  • Remove loose and deteriorated material, laitance, dirt, dust, oil and any surface contaminants that will inhibit proper bond.
  • Repair spalled areas, static cracks and voids with Conpro Set or Structural Skin.
  • Substrate should have open-pored and textured surface.
  • Apply Conpro Start where a consolidant is of benefit.
  • Saturate substrate with clean water, (saturated surface dry/SSD). Wall should be wet when Structural Skin is applied.
  • For best results on concrete grind or abrasive blast (CSP 3). Refer to ICRI Surface Preparation Guide 03732 for information about Concrete Surface Preparation (CSP).
  • Refer to Conproco Exterior Wall Systems literature for preparation over substrates other than concrete and concrete block.

Priming

  • No priming is required under normal circumstances.

Mixing

  • Mechanically mix using a low speed drill (400 – 600 rpm) and mixing paddle or mortar mixer.
  • Pour 5 quarts of potable water into a clean mixing vessel and slowly add all of the powder.
  • Mix continuously for 3 minutes to a uniform, lump-free consistency.
  • Add up to 1 pint of additional water if needed.
  • Allow to “breathe” for 1 minute and remix for 1 minute. This will improve workability and open time.
  • Do not over mix, as this will entrain air and cause damage to the glass fibers.

Application

Mortarless concrete block wall system
  • At the time of application, surfaces should be saturated surface dry (SSD) but hold no standing water.
  • Concrete block must be butt tight and wall plumb and level.
  • Trowel or spray apply material to a uniform minimum of 1/8 inch.
  • Apply with a vertical motion and finish with a horizontal motion.
  • Material must be applied so that both sides of the wall have a uniform, continuous 1/8 inch coating.
Conproco Impact Wall System (existing block, brick and concrete)
  • At the time of application, surfaces should be saturated surface dry (SSD) but hold no standing water.
  • Add 1quart of K-88 Admix (replacing 1 quart water) per bag of material.
  • The proper mix ratio is 5 parts powder to 1 part water to ¼ parts K-88 Admix.
  • Trowel or spray apply material to a uniform minimum of 1/8 inch.
  • Apply additional coat at 1/16 – 1/8 inch to achieve a level plane where desirable.
  • Trowel on with a vertical motion and finish with a horizontal motion.
Conproco Impact RM Wall System (reinforced metal lath)
  • Plywood and OSB must be APA Exterior rated and be firmly attached to substrate in accordance with applicable building codes.
  • Masonry and concrete walls must be structurally sound.
  • Place trim accessories (expansion joints, corner bead, etc.) as specified.
  • Mechanically fasten self-furring diamond mesh metal lath (complying with ASTM C841 and ASTM  C847)  within  the  confines of the panels created by the trim accessories. Make sure to overlap the flanges of the trim accessories.
  • Add 2 quarts of K-88 Admix (replacing 2 quarts water) per bag of material.
  • Trowel or spray apply material to a uniform minimum of 3/16 inch, to completely cover the lath.

Curing

  • Keep damp with a fine mist of water for 24 hours.
  • Protect from direct sunlight, wind, rain and frost during curing period.

Clean Up

  • Clean tools and equipment with water immediately after use.
  • Cured material must be removed mechanically.

Coverage/Yield

  • 45 ft.²/50 lbs. @ 1/8 inch.

Product Handling

Packaging
  • 50 lbs. paper bags.
Shelf Life
  • 12 months when properly stored.
Storage
  • Transport and store in cool, clean, dry conditions in unopened containers.
  • High temperature or high humidity will reduce shelf life.

Limitations

  • Do not apply unless substrate and ambient temperature can be maintained at a minimum of 40°F for 24 hours. Refer to ACI Cold Weather Application Guidelines.
  • Cold mixing water and low temperature will retard set. Hot water and high temperature will accelerate set.
  • Protect application from precipitation and high wind for at least 8 hours.
  • Do not add more water than specified.
  • Do not re-temper as this will damage the fiber glass reinforcing.
  • Avoid overworking material during placement.
  • Over mixing will cause damage to the fiber glass reinforcing.

Health and Safety

  • Product is alkaline.
  • Do not ingest.
  • Avoid breathing dust.
  • 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.

Disposal

  • Dispose of material in accordance with local, state and federal regulations.
  • Technical Data
  • Data Bulletin
  • CSI Spec
  • Curing
  • Pump & Spray
  • FAQs
  • Safety Data Sheet
  • RM Accessories
  • Impact Data Bulletins

Physical state and appearance

 

Gray or white powder

  

Base

 

Portland cement

  

pH

Wet mix

>12

  

Water/cement ratio

 

0.6 – 0.49 with 2 quarts K-88 Admix

  

Standard Specification for Packaged, Dry, Combined Materials for Surface Bonding Mortar

ASTM C887

Complies

  

Setting time by vicat needle

ASTM C191

Initial 60 minutes – Final 270 minutes

  

Durometer hardness

ASTM D2240

60 – 70

  

Water penetration and leakage

ASTM E514

100% reduction in leakage

  

Carbon-arc weathering

ASTM G152

2000 hours – no effect

  

Length change

ASTM C157

300 µstrains @ 28  days

  
  

7 days

14 Days

28 Days

Compressive strength – psi With 2 quarts of K-88 Admix

ASTM C109

4150
5000

4400

5290

5100

6300

Flexural strength – 3 point loading – psi

ASTM C78

  

1100

Tensile strength – psi

With 2 quarts of K-88 Admix

ASTM C307 

400

600

430

600

430

635

Allowable design stress based on gross area of the CMU (IBC) for mortar-less wall construction

Compressive stress – psi

     Standard block

     Ground block

     Shear Stress

45

85

10

Tensile stress in flexure, vertical span - psi

18

FOR PROFESSIONAL USE ONLY

Conproco warrants this product for one year from the date of manufacture to be free from manufacturing defects and to meet the technical properties on the current technical data sheet if used as directed within shelf life. User determines suitability of product for use and assumes all risks. Buyer's sole remedy shall be limited to the purchase price or replacement of product, exclusive of labor or cost of labor. June 25, 2020.

NO OTHER WARRANTIES EXPRESSED OR IMPLIED SHALL APPLY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. CONPROCO CORP SHALL NOT BE LIABLE UPON ANY LEGAL THEORY FOR SPECIAL OR CONSEQUENTIAL DAMAGES.

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
40°
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

Surface bonding cements were introduced in the mid 1970's. They were designed as a component of a masonry wall system that eliminate the mortar joint in concrete masonry construction.  Applied at 1/8" to both sides of the wall the result was a significant labor savings, and a stronger wall that was waterproof and semi-finished.  Structural Skin when applied to both sides of CMU's will structurally bond the dry laid block eliminating the need for traditional mortar joints. Because eliminating the bed joint changes coursing it may be more efficient to lay the block in the bed joint but eliminate the head joints.

Maintaining existing concrete block, brick, stucco and concrete surfaces that are structurally sound but may need repair, repoint, or simply an updated appearance can be resurfaced. A value engineered solution is to apply a monolithic cementitious coating to protect the surface from further degradation and improve physical appearance.  Structural Skin is a fiber reinforced surface bonding cement which can be applied directly to the substrate or in combination with metal lath to a thickness of 1/8" to 1/4".  The new surface is waterproof and is engineered to last the life of the structure.  Structural Skin, when applied to both sides of CMU's, will structurally bond the dry laid block eliminating the need for traditional mortar joints. 

Structural Skin can be troweled or machine applied.  Most carousel and rotor stator pumps are capable of spraying Structural Skin.

Projects Showcase

2 5th Avenue

Project History

This luxury co-op faced a very pressing and expensive issue in 2009. The building’s façade of glazed brick over cinder blocks lacked air and moisture barriers and was failing. Due to the building’s location in a designated landmark district, any remediation plan would have to be approved by the Landmark Preservation Commission. A very irregular block surface was exposed once the façade was removed. Pinholes and voids were guaranteed if the liquid air barrier membrane was applied directly to the block, compromising that system. Structural Skin, a fiber reinforced structural coating that shows a 100% reduction in water penetration and leakage per ASTM E514, was applied as a fairing coat at a depth of a quarter inch. This application not only provided a uniform surface for the air barrier, it offered secondary protection for the system by allowing moisture diffusion and acting as a moisture barrier, thereby also protecting the installed reinforcing steel supports from corrosion.

 

Hookway Fields

Project History

The Hookway Fields have been used for Syracuse University Athletics and Recreational Services for about 50 years. The project was specified for two types of exterior wall systems, Impact CM and Impact RM. Impact CM is directly applied to the CMU and Impact RM (Reinforcing Metal) is a wall system that is mechanically fastened to the wood with metal lath. Trim accessories were used for all joint details.
This was especially important between the transitional joint between the different systems. The lower portion of the building was a block substrate; so Structural Skin (with K-88 Admix) was applied directly. The upper portion was a wood substrate and required a building wrap with metal lath prior to the base coat. After the base coat was applied at a thickness of 3/16 inches, white Conpro Stucco (with K-88 Admix) was applied at 1/8 inches thick. Once the stucco had cured, one coat of Super Color Stain VO was applied to insure the buildings had a consistent color
.

 

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