Sikaflex® Construction+

Sealant for concrete and masonry facades and rigid floor joints

Sikaflex® Construction+ is a 1-component, moisture-curing, elastic joint sealant.

  • Good resistance to weathering
  • Movement capability of ± 35 % (ASTM C719)
  • Bubble-free curing
Sikaflex® Construction+

Usage

Sealing joints for:

  • Facade elements
  • Movement and connections
  • Pre-cast elements
  • Infill panels
  • Cladding
  • Curtain walling
  • Floor joints
  • Rigid pavements
  • Interior and exterior use
  • Sealing between a range of porous and non-porous substrates

Advantages

  • Good resistance to weathering
  • Movement capability of ± 35 % (ASTM C719)
  • Bubble-free curing
  • Good workability
  • Good adhesion to many construction substrates
  • Very low emissions

Packaging

600 ml foil pack, 20 foil packs per box

Colour

Colour range to be defined by local sales organization.

Product Information

Chemical base

i-Cure® Technology polyurethane

Shelf life

Sikaflex® Construction+ has a shelf life of 15 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.

Storage conditions

Sikaflex® Construction+ shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.

Density

~ 1.45 kg/L

Application Information

Sag flow

0 mm (20 mm profile, 50 °C)

(ISO 7390)

Ambient air temperature

+5 °C to +40 °C, min. 3 °C above dew point temperature

Substrate temperature

+5 °C to +40 °C

Backing material

Use closed cell, polyethylene foam backing rods.

Curing rate

~3 mm/24 hours (23 °C / 50 % r.h.)

(CQP 049-2)

Skin time

~65 minutes (23 °C / 50 % r.h.)

(CQP 019-1)

Tooling time

~55 minutes (23 °C / 50 % r.h.)

(CQP 019-2)

Consumption

Joint length [m] per 600 ml foil pack

Joint width [mm]

Joint depth [mm]

6 10 10

4

15

 10
3

20

 10
2 25 12
1.3 30 15
Technical Information

Shore A hardness

~28 (after 28 days)

 (ISO 868)

Secant tensile modulus

~0.45 N/mm2 at 100 % elongation (+23 °C)

(ISO 8339)
~1.10 N/mm2 at 100 % elongation (-20 °C)  

Movement capability

± 25 %

(ISO 9047)
± 35 % (ASTM C 719)

Elastic recovery

~90 %

(ISO 7389)

Tear propagation resistance

~7.0 N/mm

 (ISO 34)

Service temperature

-40 °C to +70 °C

Resistance to weathering

 8

 (ISO / DIS 19862)

Joint design

The joint width must be designed to suit the joint movement required and the movement capability of the sealant. The joint width must be a minimum of 6 mm and a maximum of 50 mm. A width to depth ratio of 2:1 must be maintained. Joint widths less than 10 mm are generally for interior connection joints or crack control joints and therefore considered as non-movement joints. Example of typical joint widths for joints between concrete elements for exterior applications if the joint sealant is classified as ±25 % movement capability according to ISO 9047, calculation according to DIN 18540.


Standard joint widths for joints between concrete elements

Joint distance [m]

Min. joint width [mm]

Min. joint depth [mm]

2 10 10
4 15 10
6 20 10
8 30 15
10 35 17

Example of typical joint widths for joints between concrete elements for exterior applications if the joint sealant is classified as ±35 % movement capability according to ASTM C 719, Calculation according to ASTM C 1472-10:

Joint distance [m]

Min. joint width [mm]

Min. joint depth [mm]

2 10 10
4 15 10
6 15 10
8 25 12
10 30 15

All joints must be correctly designed and dimensioned in accordance with the relevant standards and codes of practice before their construction. The basis for calculation of the necessary joint widths are:

  • The type of structure
  • Dimensions
  • Technical values of the adjacent building materials
  • Joint sealing material
  • The specific exposure of the building and the joints

For joint design and calculations contact Sika® Technical Services for additional information.

Sikaflex® Construction+

Technical Data Sheet (TDS)

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