Wall Cladding System Components
Flexcrete
Flexible Polymer Based Cementitious Base Coat & Water Resistive Air Barrier
Technical Performance Features
Vapour Permeance - 385.56 ng/Pa.s.m²
Coverage

10-12 m2 (107-130ft2) per pail/bag

NMS
09222
Product Description
Technical Performances
Documentation
Description

Flexcrete is a two-component polymer-based coating consisting of Flexcrete, a water-based acrylic, and Flexcrete ‘B,’ a cementitious-based dry blend. The Flexcrete mix has been developed to utilize advanced polymer technology to combine the strength and toughness of polymer-modified cement with the flexibility of synthetic polymers.

Advantages
  • Superior adhesion to various inorganic substrates
  • Combines the strength of cement and the flexibility of synthetics
  • Designed to allow minor movements in the substrate without causing cracking in the base coat
  • High flexibility that allows for large surface areas to be coated without the need of unwanted control joints
  • Easy to mix and use
Uses

Flexcrete coating is intended be used as the base coat in Durex® Stucco Lite Soffit, Durex® Flexlite and Durex® Quantum system applications. This product is suitable for use as a joint treatment and base coat for cement board and glass-mat faced gypsum substrates. Flexcrete may also be used as the insulation adhesive for all Durex® EIFS Systems. In addition, Flexcrete functions as a water-resistive (WRB) air barrier.

Physical Properties
 
Product type

Water based acrylic, sand-filled mixture

Appearance

White semi-solid ready mixed paste

Viscosity

Pourable paste

pH Level

9.0 to 9.5

Toxicity

Non-toxic

Coverage

Each pail/bag will provide approximately 10-12 m2 (107-130ft2)  


Performance Properties
Method Results
Tensile strength

ASTM C190

  • 0.35 MPa (50 psi) without mesh
  • 16.55 MPa (2400 psi) with mesh
Elongation

ASTM D412

9.4%

Air Leakage

ASTM E283

0.0022 L/s.m2  (0.004 cfm/ft2) @ 75 Pa

Water Vapour Permeance
  • ASTM E96 Method A
  • ASTM E96 Method B
  • 400 ng/Pa.s.m2 (7.0 Perms)
  • 972 ng/Pa.s.m2 (17 Perms)
Impermeability to Water

CCMC Method 6.7

385.56 ng/Pa.s.m² (6.74 perms) @ 25°C (77°F)

Coefficient of Water Absorption

CCMC Method 5.5.1

0.0007 Kg (m².s1/2)

Salt Spray Resistance

ASTM B-117

Passed (300 hours)

Accelerated weathering

ASTM D-822

Passed (2000 hours)

Freeze/Thaw Resistance

CCMC TG 07 24 13.01

Passed (10 cycles)

Adhesion (axial pull)

ASTM D1623

                  Cement      Concrete    Glass Mat 

                   Board                               Gypsum    

Dry State   Pass              Pass             Pass          

2h- dry       Pass              Pass             Pass          

7 d- dry      Pass              Pass             Pass