UsageSikaflex® PRO is designed for movement and connection joints on porous substrates as well as indoor and outdoor general sealing applications.
- Movement capability of ± 25 (ASTM C 719)
- Good workability
- Good adhesion to many substrates
310 ml cartridge, 12 cartridges per box
600 ml foil pack, 20 foil packs per box
White, Off White, Sandstone, Pale Brown, Japan Beige, Grey, Dark Grey, Brick Red, Redwood, Black, Dark Amber
- LEED EQc 4.1
- SCAQMD, Rule 1168
- BAAQMD, REg. 8, Rule 51
APPROVALS / CERTIFICATES
- AS/NZS 4020:2018 - Water Potable Approved
- ISO 11600 F 25 LM
- ASTM C 920 class 25
Sikaflex® PRO has a shelf life of 12 months from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.
Sikaflex® PRO shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.
1.25 kg/l approx.
Shore A hardness
25 approx. (after 28 days)
Secant tensile modulus
0.35 N/mm2 approx. at 100% elongation (23 °C)
|0.50 N/mm2 approx. at 100% elongation (−20 °C)|
Tear propagation resistance
5.5 N/mm approx.
|± 25%||(ASTM C 719)|
−40 °C to +70 °C
The joint width must be designed to suit the joint movement required and the movement capability of the sealant. The joint width shall be ≥ 10 mm and ≤ 40 mm. A width to depth ratio of 2:1 must be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements
Joint distance [m]
Min joint width [mm]
Min. joint depth [mm]
All joints must be correctly designed and dimensioned in accordance with the relevant standards, before their construction. The basis for calculation of the necessary joint widths are the type of structure and its dimensions, the technical values of the adjacent building materials and the joint sealing material, as well as the specific exposure of the building and the joints.
For larger joints please contact our Technical Service Department.
Use closed cell, polyethylene foam backing rods.
0 mm (20 mm profile, 50 °C)
Ambient air temperature
+5 °C to +40 °C, min. 3 °C above dew point temperature
+5 °C to +40 °C
3 mm/24 hours approx. (23 °C / 50% r.h.)
170 minutes approx. (23 °C / 50% r.h.)
150 minutes approx. (23 °C / 50% r.h.)
|Joint length [m] per 600 ml foil pack|
Joint width [mm]
Joint depth [mm]
The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Sikaflex® PRO adheres without primers and/or activators.
However, for optimum adhesion and critical, high performance applications, such as on multi-story buildings, highly stressed joints, extreme weather exposure or water immersion, the following priming and/or pre-treatment procedures shall be followed:
Aluminium, anodised aluminium, stainless steel, galvanised steel, powder coated metals or glazed tiles have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel. Before sealing, allow a flash-off time of > 15 minutes (< 6 hours).
Other metals, such as copper, brass and titanium-zinc, also have to be cleaned and pre-treated using Sika® Aktivator-205,wiped on with a clean towel. After the necessary flash-off time, use a brush to apply Sika® Primer-3 N and allow a further flash-off time of > 30 minutes (< 8 hours) before sealing the joints.
PVC has to be cleaned and pre-treated using Sika® Primer-215 applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).
Concrete, aerated concrete and cement based renders, mortars and bricks shall be primed using Sika® Primer-3 N applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours).
For more detailed advice and instructions please contact the local Sika Technical Services Department.
Note: Primers are adhesion promoters. They are neither a substitute for the correct cleaning of a surface, nor do they improve the strength of the surface significantly.
CLEANING OF EQUIPMENT
Clean all tools and application equipment immediately after use with Sika® Remover-208 and/or Sika® TopClean T. Once cured, residual material can only be removed mechanically.