Wall Cladding System Components
Flexcrete FS (Fast Set)
Flexible Polymer-Based Cementitious Base Coat Adhesive & Water-Resistive Air Barrier - Fast Set
Coverage

10-12m2 (107-130 FT2)  per pail/bag

Product Description
Technical Performances
Documentation
Description

Flexcrete FS forms part of the Durex Flexcrete family of products incorporating all of the features of the Flexcrete plus a fast set feature to allow for faster curing and recoating process. Flexcrete FS is a two-component polymer-based coating consisting of Flexcrete FS, a water-based acrylic, and Flexcrete FS ‘B,’ a cementitious-based dry blend. The Flexcrete FS mix has been developed to render stetting and curing times of ¼ of the time of the traditional Durex Flexcrete, allowing for recoating within 30 minutes.   

Advantages
  • Faster setting and curing times (1/4 of the standard Durex Flexcrete) allows for recoting within 30 minutes
  • Designed to allow minor movements in the substrate without causing cracking in the base coat
  • Easy to mix and use
  • Excellent job site quality control
Uses

Flexcrete FS mix can be used as the base coat in Durex® Stucco Lite family of systems, Durex® Flexlite and Durex® Quantum system applications. This product is best suited for applications that require the work to be completed faster (same day completion). Flexcrete FS may also be used as the insulation adhesive for all Durex® EIFS Systems. In addition, Durex® Flexcrete FS 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 10-12m2 (107-130 FT2)

 


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%

Flexural Strength

ASTM C293

8.28M MPa (1200 psi)

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) @ 2.36 mm
  • 972 ng/Pa.s.m2 (17 Perms) @ 2.36 mm
Impermeability to Water

CCMC 6.7

Pass

Coefficient of Water Absorption

CCMC 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 Method

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