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Sikaflex® PRO-3
1-part high performance civil engineering joint sealant
Sikaflex® PRO-3 is a 1-component, moisture-curing, elastic joint sealant with high mechanical and chemical resistance. Suitable for use in hot and tropical climatic conditions.
- Movement capability of ± 35 % (ASTM C 719)
- Very high mechanical and chemical resistance
- Bubble-free curing
- Good adhesion to most construction materials
- Jet fuel and diesel resistance
- Solvent-free
- Very low emissions
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Usage
Sikaflex® PRO-3 is designed for movement and connection joints in floors, pedestrian and traffic areas (example: parking decks, car parks), warehouses and production areas, applications in the food industry, sewage treatment plants, tunnel construction and in clean rooms. It can be used for vertical and overhead joints.Advantages
- Movement capability of ± 35 % (ASTM C 719)
- Very high mechanical and chemical resistance
- Bubble-free curing
- Good adhesion to most construction materials
- Jet fuel and diesel resistance
- Solvent-free
- Very low emissions
Packaging
600 mL foil pack, 20 foil packs per box
Colour
Concrete grey (further colours available upon request)
Product Details
SUSTAINABILITY
Sikaflex® PRO-3 conforms to LEED® EQc 4.1
- VOC content < 30 g/l (US EPA method 24)
- EMICODE EC1PLUS R
- SCAQMD, Rule 1168
- BAAQMD, Regulation. 8, Rule 51
APPROVALS / CERTIFICATES
- ASTM C 920, class 35
- ISO 11600 F 25 HM
- EN 15651-4 PW EXT-INT CC 25 HM
- ISEGA Certificate for foodstuff area usage
- BS 6920 (drinking water contact)
- ASTM C 1248 non-staining on marble
- ISO 16938-1 non-staining on marble
- CSM TVOC tested (ISO -6.8)
- CSM biological resistant: very good
- Tested according principals of DIBt for Waste Water Exposure
- Resistance against Diesel and Jet Fuel according to the DIBt guidelines
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Composition
i-Cure® Technology polyurethane
Shelf life
Sikaflex® PRO-3 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® PRO-3 shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density
| ~1.35 kg/l | (ISO 1183-1) |
Shore A Hardness
| ~37 (28 d) | (ISO 868) |
Secant Tensile Modulus
~0.60 N/mm2 at 100 % elongation (23 °C) | (ISO 8339) |
| ~1.10 N/mm2 at 100 % elongation (−20 °C) |
Elastic Recovery
~90 % | (ISO 7389) |
Tear Propagation Resistance
~8.0 N/mm | (ISO 34) |
Movement Capability
| ± 35 % | (ASTM C 719) |
Chemical Resistance
Sikaflex® PRO-3 is resistant to water, seawater, diluted alkalis, cement slurry and water dispersed detergent, diesel and jet fuel according to the DIBt guidelines.
Sikaflex® PRO-3 is not resistant to alcohols, organic acids, concentrated alkalis and concentrated acids and other hydro-carbons.
Service Temperature
-40 °C min. / +70 °C max.
Joint Design
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 ≤ 50 mm. A width to depth ratio of 1 : 0.8 must be maintained (for exceptions, see table below).
Standard joint widths for joints between concrete elements:
(Movement Capability: ± 35 % (ASTM C719) and ∆T: 80 °C)
| Joint distance [m] | Min. joint width [mm] | Min. joint depth [mm] |
| 2 | 10 | 10 |
| 4 | 12 | 10 |
| 6 | 18 | 15 |
| 8 | 22 | 18 |
| 10 | 28 | 22 |
For larger joints following depth should be maintained:
| Joint width [mm] | Joint depth [mm] |
| 30 | 24 |
| 35 | 28 |
| 40 | 32 |
| 45 | 35 |
| 50 | 35 |
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 more detailed advice and instructions please contact our Technical Department.
Application
Backing Material
Use closed cell, polyethylene foam backing rods.
Sag Flow
0 mm (20mm profile, 50 °C) | (ISO 7390) |
Ambient Air Temperature
+5 °C min. / +40 °C max. (min. 3 °C above dew point temperature)
Substrate Temperature
+5 °C min. / +40 °C max.
Curing Rate
~3.5 mm / 24 h (23 °C / 50 % r.h.) | (CQP 049-2) |
Skinning time
~60 min (23 °C / 50 % r.h.) | (CQP 019-1) |
Tooling Time
~50 min (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 |
| 3.3 | 15 | 12 |
| 1.9 | 20 | 16 |
| 1.2 | 25 | 20 |
| 0.8 | 30 | 24 |
| 0.5 | 40 | 32 |
| 0.3 | 50 | 35 |
SUBSTRATE PREPARATION
The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Sikaflex® PRO-3 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:
Non-porous substrates
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 (< 2 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 (< 4 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 (< 4 hours).
Porous substrates
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 (< 4 hours).
For more detailed advice and instructions please contact our Technical 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.