Sikaflex® PRO-3 WF
Sikaflex® PRO-3 WF is a flexible, 1-component sealant based on polyurethane with good mechanical resistance and a permissible movement capacity of 25%. Sikaflex® PRO-3 WF reacts with air humidity and turns into an elastic sealant.
- Movement capacity 25%
- Flexible
- Bubble-free curing
- Good mechanical and chemical resistance
- Excellent adhesion to most construction materials
Usage
Sikaflex® PRO-3 WF is versatile and therefore suitable for various fields of use. Design of joints must be matched to the individual conditions of the project.- Floor joints
- Floor joints in areas exposed to chemicals
- Joints in waste water and sewage treatment plants with domestic sewage
- Joints in tunnel construction
Advantages
- Movement capacity 25%
- Flexible
- Bubble-free curing
- Good mechanical and chemical resistance
- Excellent adhesion to most construction materials
Packaging
Unipacs at 600 ml (1 carton = 20 unipacs)
Colour
Concrete grey
Product Details
APPROVALS / STANDARDS
Conforms to ISO 11600 F 25 HM. Tested according to the Principals of DIBT for Waste Water Exposure ISEGA Certificate for foodstuff area usage.
Chemical base
Polyurethane, 1-pack, moisture curing
Shelf life
15 months from date of production if stored in cool (at +10 °C to 25 °C) and dry conditions, in original sealed containers. Protect from direct sun radiation.
Storage conditions
Sikaflex® PRO-3 WF shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density
Approx. 1.30 kg/lShore A Hardness
Approx. 35 (in conformity with DIN 53505, after preparation as per DIN 52 455 part 2)Elastic Recovery
| ~80 % | (DIN EN 27 389) |
Tear Strength
| Approx. 8 N/mm2 | (DIN 53 515) |
Movement Capability
25 % (related to initial width of joint)
CHEMICAL RESISTANCE
Sikaflex® PRO-3 WF was tested by the Polymer Institute according to the construction and testing rules of DIBt (German Institute of construction) for Sikafloor bund area system as well as for sewers and sewage treatment plants as per DIN 52 452, part 2.
| Testing group | Name | Testing time | Classification |
| 1 | 3 - and - 4 Star petrol | 24h / 72h | (+) / (+) |
| 3 | Fuel oil EL, diesel oil as well as unused lubrication oils | 24h / 72h | + / + |
| 4a* | Benzol and benzol containing mixtures | 24h / 72h | (+) / (+) |
| 5 | Alcohols, glycolether | 24h / 72h | (+) / - |
| 6 | Aliphatic halogenrated – hydrocarbons | 24h / 72h | (+) / - |
| 7 | Aliphatic ester and ketones | 24h / 72h | + / - |
| 8 | Aliphatic aldehydes | 24h / 72h | + / + |
| 9 | Watery solution of organic acids up to 10% | 24h / 72h | + / + |
| 10 | Organic acids (carboxylic acid) except formic acid | 24h / 72h | + / + |
| 11 | Anorganic lyes | 24h / 72h | + / + |
| 12 | Anorganic solutions, non-oxidizing salts | 24h / 72h | + / + |
| 13 | Amines | 24h / 72h | - / - |
| 14.1 | Watery solutions of organic tensides | 24h / 72h | + / + |
| 14.2 | Watery solutions of organic tensides | 24h / 72h | + / + |
* Testing group 4a includes testing group 2-4b
Note: + resistant (+) limited resistance (swelling possible) - not resistant In case of chemical exposure the resistance of the sealant is limited. Joints exposed to chemicals are service joints and may have to be refurbished after exposure.
Diffusion Resistance to Water Vapour
3 bar (without additional protection) (according to the building and testing rules DIBt)
Service temperature
−40 °C min. / +70 °C max.
Joint Design
Sikaflex® PRO-3 WF is suitable for sealing joints between building elements. As an additional protection against water pressure an extra backfilling of the joint space behind the sealant - e.g. with expanded polystyrene - is strongly recommended. The sealing function (interior and exterior) may be increased by waterbars embedded into the concrete.
For a temperature differential of +40 °C we recommend:
| Joint distance [m] | Min. joint width [mm] | Thickness of sealant [mm] |
| 2 | 10 | 10 |
| 4 | 10 | 10 |
| 6 | 10 | 10 |
| 8 | 15 | 12 |
| 10 | 20 | 15 |
Relevant is the joint width during application of the sealant, guide temperature +10 °C For exterior areas with temperature differential of 80 °C, we recommend:
| Joint distance [m] | Min. joint width [mm] | Min. joint depth [mm] |
| 2 | 10 | 10 |
| 4 | 15 | 12 |
| 5 | 18 | 15 |
| 6 | 20 | 15 |
| 8 | 30 | 25 |
Application
Backing Material
For Sikaflex® PRO-3 WF use only closed cell, sealant compatible foam backer rods (e.g. high-resilience polyethylene foam rod). Using the backer rod the joint depth can be limited, diameter should be approx. 20% bigger than the joint width. Use only blunt implements to avoid damage to the backer rod. As an additional protection against water pressure an extra backfilling of the joint space behind the backfilling material - e.g. with expanded polystyrene, is strongly recommended. The sealing function (interior and exterior) may be increased by waterbars embedded into the concrete.
Sag Flow
| Sag resistance | Excellent |
Substrate Temperature
+5 °C to +40 °C (temperature of material and substrate up to 8 hours. after application)
Curing Rate
Approx. 2 mm/24 hours (at +23 °C / 50% r.h.)Skin time
Approx. 90 minutes (at +23 °C / 50% r.h.)SUBSTRATE PREPARATION
The bond areas must be of sufficient strength, dense, dry and free of oil and dust. In combination with Sika® Primer-3 N mat damp concrete is acceptable. Cleaning of joint arises must ensure that all friable particles and contaminations are removed. Concrete should normally be prepared with an angle grinder. Absorbent substrates do need a dry cleaning (by brush), non absorbent substrates a wet cleaning (de-dusting/removal of oil), metal angle profiles. The solvents must evaporate completely prior to sealing the joints. Respect recommended curing time until sealing of the joints.