Product Data Sheet
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Sikaflex®-2c NS EZ Mix+

Two-component, non-sag, polyurethane elastomeric class 50 sealant

Sikaflex®-2c NS EZ Mix+ is a 2-component, premium-grade, polyurethane-based, green/damp concrete adhesive, elastomeric sealant. It is principally a chemical cure in a non-sag consistency. Meets ASTM C920, Type M, Grade NS, Class 50, 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.

  • True Class 50 sealant
  • Adhesion to damp and green concrete
  • Chemical cure allows the sealant to be placed in joints exceeding ½ in. 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.
  • 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).
Product Data Sheet
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Usage

  • Intended for use in all properly designed working joints with a minimum depth of ¼ inch.
  • Ideal for vertical and horizontal applications.
  • Placeable at temperatures as low as 40 °F.
  • 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

  • True Class 50 sealant
  • Adhesion to damp and green concrete
  • Chemical cure allows the sealant to be placed in joints exceeding ½ in. 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.
  • 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).

Packaging

1.5 gal. unit, 3 gal unit.

Color

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

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

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

Shelf Life

One year in original, unopened containers.

Storage Conditions

Store dry at 40–95 °F (4–35 °C).

Condition material to 65–75 °F before using.
Technical Information

Shore A Hardness

22

(after 7 days at 73 °F (23 °C) and 50 % R.H.) (ASTM D-2240)

Tensile Strength

118 psi

(after 7 days at 73 °F (23 °C) and 50 % R.H.) (ASTM D-412)

Tear Strength

>34 lbf./in.

(after 7 days at 73 °F (23 °C) and 50 % R.H.) (ASTM D-624)

Application

Application Information

Ambient Air Temperature

40 °F to 100 °F
Sealant should be installed when joint is at mid-range of its anticipated movement.

Substrate Temperature

40 °F to 100 °F
Sealant should be installed when joint is at mid-range of its anticipated movement.

Pot Life

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

   73 °F

   100 °F

40 °F

   4–6

3

6

Cure Time

3 days

(73F (23C) and 50% RH)(ASTM C-679)

Tack Free Time

80 minutes

(73ºF (23ºC) and 50% RH) (ASTM C 679)

Application Time

2 hours at 73 °F 
Consumption

Coverage

1 gallon: Yield in Linear feet

Width/Depth1/4''3/8''1/2''
1/4''307.9
3/8''205.3136.8
1/2''153.9102.677.0
3/4''102.638.451.3
1''38.5
1.25''30.8
1.5''25.7
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 Technical Service or Sikaflex Primer Technical Data Sheet for additional information on priming. 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 429 primer 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 Sikaflex 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 (<50 °F), 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 1/2 to 3/4 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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