1. The new technology for watertight construction joints

2. SikaSwell S-2 is a new generation of a gun grade waterstop ...

3. ...that extruded with a simple gun between hardened and fresh concrete...

4. ... expands its volume in contact with water !
Creating a counterpressure that stops the water flow !

5. Where to use SikaSwell S-2 ?
Construction joints (without movement) in :
Foundations
Tunnels
Retaining Walls
Pipe penetrations
Penetrations of any kind

6. Cellars and garages
Concrete floors and slabs

7. Precast elements Precast in general Concrete pipes
Segments for underground construction

8. Sealing of construction daywork joints

9. Sealing between new and existing construction

10. Sealing between precast concrete pipes and culverts

11. Bonding of SikaSwell Profiles

12. Bonding of Sika Injectoflex Hoses

13. Sealing of cracks
Sikadur-31
SikaSwell S-2

14. Sealing of pipe entries

15. Sealing between different construction materials

16. How does SikaSwell S-2 work ?
SikaSwell S-2 gradually starts to swell in contact with water and can double its volume in only few days...

17. How does SikaSwell S-2 work ?
... building up pressure between the surfaces that...

18. ... is slow enough to avoid formation of cracks in fresh concrete when hardening has not yet started and the mechanical properties of concrete are still very low

19. Swelling is quick enough to stop water in few hours when a completely dry structure is filled with water !

20. Free expansion is greater than 100% after 7 days water inmersion
200
180
160
140
120
100
Change in volume (%) 80 60 40 20
1 day
3 days
7 days
14 days

21. Expansion >2 times in 7 days !
16 mm
16 mm
10 mm
10 mm
10 mm
16 mm
Area = mm2
Area = 110,85 mm2
Expansion >2 times in 7 days !

22. No profile SikaSwell S-2 Water flows through the construction joint
With SikaSwell S-2 water can pass at the beginning but in a very limited quantity
SikaSwell S-2
After expansion
the pressure generated by SikaSwell S-2 assures a perfectly watertight joint

23. Before expansion After expansion
When SikaSwell S-2 is in a confined space its expansion results in the filling of all the gaps and cracks around the construction joint and generates a pressure that stops water flow

24. SikaSwell S-2 is based on a new improved formulation
3000
Excellent workability over a temperature range of + 5oC to + 35oC
Low extrusion force at + 5oC
SikaSwell S
SikaSwell S-2
2500
2000
Extrusion Force (N)
1500
1000
500
5°C
23°C
35°C
Temperature (°C)

25. SikaSwell S-2 is based on a new improved formulation
Good sag resistance even at high temperatures
Very short cut-off “string”
Long shelf life
Can be applied on a damp (no standing water) concrete surface
Others
SikaSwell S-2

26. Optimal swelling properties
SikaSwell S-2

27. SikaSwell S-2 adheres perfectly to irregular substrates
SikaSwell S-2 compensates for irregularities of the hardened concrete surface assuring watertightness

28. SikaSwell S-2 starts to act before swelling
Rubber
profile
Water can pass ! Water doesn’t pass !
Due to their rigidity, profiles cannot compensate irregularities of the concrete. The profile has first to expand to seal these irregularities
SikaSwell S-2 addapts to the irregularities during applications and therefore seals much faster !

29. SikaSwell S-2 can also be applied on vertical surfaces
Tixotrophic
For easier application cut the nozzle in aprox. 45o angle

30. Application considerations
SikaSwell S-2 has to be applied at the center of the construction element

31. Application considerations
Application in the centre of the concrete section.
Minimum cover on both sides :
Non Reinforced concrete
Reinforced concrete

32. H2O H2O With a triangular shape
Better resistance of fresh profile to wet concrete pouring
H2O
Lower sensitivity to extrusion irregularities
H2O

33. Packaging Two types of packaging are available Unipac 300 ml cartridge
Yellow foil
Carton Box
containing
20 unipacs x 600 cc
4 triangular nozzles
1 cutter
300 ml cartridge
12 cartridges per carton box
12 nozzles

34. Triangular nozzle (Unipac)
Unipac packaging includes triangular shaped nozzles
Cartridges have normal nozzle

35. Profile dimensioning 20 - 30 15*15*15 30 - 50 20*20*20
The size of the triangle of SikaSwell S-2 depends on the thickness of the concrete section
20 mm
15 mm
Concrete Side of triangular
thickness section (mm)
*15*15
*20*20
Bigger or smaller sections can be used depending on jobsite conditions (surface roughness, size of aggregates etc.))

36. Size and nozzle sections
By Cutting nozzles at different lengths , different sections can be obtained
20 mm
15 mm
25 mm
Nozzle size section theoretical
(mm) (mm2) length* (m)
15x15x
20x20x
Length that can be applied from each unipac
* The effective consumption from a 600 ml unipac can be lower than the calculated value depending on the irregularities of the concrete surface !

37. Cartridge nozzle cutting
15 (20) mm
15 * 15 *15 mm
20 * 20 *20 mm

38. Size and nozzle sections (cartridges)
Nozzle size section theoretical
(mm) (mm2) length* (m)
15x15x
20x20x
Length that can be applied from each cartridge
* The effective consumption from a 300 ml cartridge can be lower than the theoretical value depending on irregularities of the concrete surface !

39. How to apply SikaSwell S-2 ?

40. How to apply SikaSwell S-2 ?
Very easy !

41. Apply over the hardened concrete like an ordinary sealant !

42. Fresh Concrete should not be placed before 2-3 hours
Fresh Concrete should not be placed before 2-3 hours. The skin of the sealant is strong enough to protect from being flattered when concrete is poured from a hight of up to 50 cm.

43. If the hight is > 50 cm the curing time of SikaSwell S-2 should be at least 2 days.
During concreting care must be taken that SikaSwell S-2 is completely covered with a dense concrete without any honeycombs. This is best achieved by placing a mortar or fine concrete cover.

44. Is SikaSwell S-2 affected by rain after application?
Even if the product has been exposed to rain for 24 hours there is only a small expansion because of the initially slow reaction with water. Important: there should not be any standing water.
In any event, it‘s better to protect SikaSwell S-2 from rain

45. 20 m
Although SikaSwell S-2 has been tested at waterpressures up to 5 bars it’s normally not recommended for water pressures higher than 2 bar because of the limited sealing distance.
For higher pressures it can be used as adhesive for the Sika Injectoflex System or in conjunction with other waterproofing measures

46. SikaSwell S-2 Versatile Easy and fast application Low application cost
Suitable for site batched or precast concrete

47. Other SikaSwell solution for watertight construction joints
SikaSwell P
Swellable profiles

48. SikaSwell P

49. SikaSwell P Different types available! 2003 20 3 2005 20 5 2010 20 10
2010H 20 10
2507H 25 7

50. SikaSwell solutions for watertight construction joints !