Product Data Sheet Show all documents

Sikaflex®-2c NS EZ Mix

Two-component, non-sag, polyurethane elastomeric sealant

Sikaflex®-2c NS EZ Mix is a 2-component, premium-grade, polyurethane-based, elastomeric sealant. It is principally a chemical cure in a non-sag consistency. Meets ASTM C 920, Type S, Grade NS, Class 25, use T, NT, M, G, A, O, I and Federal specification TT-S-00230 C Type II, Class A.  Meets Canada Standard CAN/CGSB 19.24 - M90.

  • Capable of ±25 % joint movement.
  • Chemical cure allows the sealant to be placed in joints exceeding 12 mm. in depth.
  • High elasticity with a tough, durable, flexible consistency.
  • Exceptional cut and tear resistance.
  • Exceptional adhesion to most substrates without priming.
  • Available in 35 architectural colors.
  • Color uniformity assured via Color-pak system.
  • Available in pre-pigmented Limestone Gray (no Color-pak needed).
  • Non-sag even in wide joints.
  • Easy to mix.
  • Paintable with water, oil, and rubber-base paints.
  • Jet fuel resistant.
  • Cold weather booster for initial tack (see reverse side for data).
  • Shore A hardness can be increased by using “TG” additive. See Sikaflex-2c NS TG data sheet for specific details.
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Product Data Sheet Show all documents

Usage

  • Intended for use in all properly designed working joints with a minimum depth of 6 mm.
  • Ideal for vertical and horizontal applications.
  • Placeable at temperatures as low as 5 °C.
  • Adheres to most substrates commonly found in construction.
  • An effective sealant for use in Exterior Insulation Finish Systems (EIFS).
  • Submerged environments, such as canal and reservoir joints.
 

Advantages

  • Capable of ±25 % joint movement.
  • Chemical cure allows the sealant to be placed in joints exceeding 12 mm. in depth.
  • High elasticity with a tough, durable, flexible consistency.
  • Exceptional cut and tear resistance.
  • Exceptional adhesion to most substrates without priming.
  • Available in 35 architectural colors.
  • Color uniformity assured via Color-pak system.
  • Available in pre-pigmented Limestone Gray (no Color-pak needed).
  • Non-sag even in wide joints.
  • Easy to mix.
  • Paintable with water, oil, and rubber-base paints.
  • Jet fuel resistant.
  • Cold weather booster for initial tack (see reverse side for data).
  • Shore A hardness can be increased by using “TG” additive. See Sikaflex-2c NS TG data sheet for specific details.

Packaging

5.7 L unit and 11.4 L units (1.5 and 3 US gal. units)

Colour

A wide range of architectural colors are available.
Special colors available on request.

Product Details

Sustainability / Certifications / Approvals

SUSTAINABILITY

  • LEED® EQc 4.1
  • SCAQMD, Rule 1168
  • BAAQMD, Reg. 8, Rule 51

CERTIFICATES AND TEST REPORTS

  • Certified to NSF/ANSI standard 61 for portable water
  • 2-hour UL Fire Rated Joint System Nos. FF-S-1034, FW-S-1020, HW-S-1018, WW-S-1037.
 

Product Information

Shelf life

12 months in original, unopened containers.

Storage conditions

Store dry at 4–35 °C

Condition material to 18–24 °C before using.
Technical Information

Shore A hardness

25 ± 5 (23 °C / 50 % R.H.)

(ASTM D2240)

Tensile strength

~0.62 MPa (90 psi) (23 °C / 50 % R.H.) 

(ASTM D412)

Tear strength

~8.036 kg/cm (23 °C / 50 % R.H.)

(ASTM D624)

Chemical resistance

Good resistance to water, diluted acids, diluted alkalines, and residential sewage. Consult Technical Service for specific data.

Resistance to weathering

Excellent

Service temperature

-40 °C to 75 °C

Adhesion in peel

Peel Strength (concrete)Adhesion loss
> 2.63 N/mm (> 15 lb/in)

0%

(23 °C / 50 % R.H.)

Tensile stress at specified elongation

~0.48 MPa (70 psi) at 100 % (23 °C / 50 % R.H.)

(ASTM D412)

Application

Application Information

Ambient air temperature

4 °C to 38 °C
Sealant should be installed when joint is at mid-range of its anticipated movement.

Substrate temperature

4 °C to 38 °C
Sealant should be installed when joint is at mid-range of its anticipated movement.

Pot Life

Sikaflex®-2c NS EZ Mix Working Time (hours)

   23 °C   38 °C   4 °C
Sikaflex-2c NS   4–6   3   6
w/ 1 booster   2   1   2–3
w/ 2 boosters   1   <1   1.5

Curing time

~3 days

(ASTM C679)

Tack free time

~8-10 hours

(ASTM C679)
Consumption

Consumption

Joint length [m]
per 1000 ml of product

Joint width (mm)

Joint depth (mm)

27

6

6

16

10

6

12

13

6

52010
32512
23015
1.24020
Application steps

SUBSTRATE PREPARATION

Priming is typically not necessary. Most substrates only require priming if sealant will be subjected to water immersion after cure. Testing should be done, however, on questionable substrates, to determine if priming is needed. Consult Sika Technical Service.

Note: Most Exterior Insulation Finish Systems (EIFS) manufacturers recommend the use of a primer. When EIFS manufacturer specifies a primer or if on-site bond testing indicates a primer is necessary, Sikaflex® Primer-429 is recommended. On-site adhesion testing is recommended with final system prior to the start of a job.

MIXING

Pour entire contents of Component ‘B’ into pail of Component ‘A’. Add entire contents of Color-pak into pail and mix with a low-speed drill (400–600 rpm) and Smixing paddle.* Mix for 3–5 minutes to achieve a uniform color and consistency. Scrape down sides of pail periodically. Avoid entrapment of air during mixing. When mixing in cold weather (<10 °C), do not force the mixing paddle to the bottom of the pail. After adding Component ‘B’ and Color-pak into Component ‘A’, mix the top 12 to 20 mm of the pail during the first minute of mixing. After scraping down the sides of the pail, mix again for another minute. The paddle should reach the bottom of the pail between the first and second minute of mixing. Scrape down the sides of the pail a second time and then mix for an additional 2–3 minutes until the sealant is well blended. Color-pak must be used with tint base. For pre-pigmented Limestone base, just mix with low speed drill and Sikaflex paddle (no Color-pak needed).

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