FOX MULTIPLUS® 2K FS542 is a bitumen-rubber and cement-based, two-component, solvent-free, flexible waterproofing material with crack-bridging properties. It meets the TS EN 15814+A2:2015 CB1-W1-C2A-R1 requirements.
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Product Description
FOX MULTIPLUS® 2K FS542 is a two-component, solvent-free, flexible waterproofing material consisting of a polymer-modified bitumen-rubber component A and a special cement blend component B. Thanks to its crack-bridging capability, it forms a continuous and permanent waterproofing layer that is resistant to structural movements. It can be applied from the positive side on exterior surfaces, reinforced concrete surfaces below ground, foundations and retaining walls, basement retaining walls, and areas such as balconies, terraces and basements. It meets the CB1 (≥1 mm static crack bridging), W1 (0.0075 N/mm² water impermeability under pressure), C2A (0.30 MN/m² compressive strength) and R1 (≤24 hours rain resistance) classifications in accordance with TS EN 15814+A2:2015.
Key Benefits
- Provides proven waterproofing with TS EN 15814+A2:2015 CB1-W1-C2A-R1 classification.
- Protects waterproofing against structural movements with ≥1 mm static crack-bridging capacity.
- Solvent-free; its water-based formulation offers an environmentally friendly and user-friendly application.
- Can be applied on slightly damp and dry surfaces; provides flexibility in surface preparation.
- Offers long-lasting protection against freeze-thaw cycles and high temperatures (service range -20°C / +80°C).
- Easily applied by brush or trowel; does not sag on vertical surfaces.
Advantages
- Long-lasting; resistant to water, weak acids and certain salt solutions.
- Does not sag on vertical surfaces.
- Has crack-bridging properties.
- Can be applied on slightly damp and dry surfaces.
- Easy and fast to apply.
- Applied by brush or trowel.
- Forms a seamless, permanent and moisture-impermeable coating.
- Creates a joint-free, continuous and permanent waterproofing layer.
- Used without problems in horizontal and vertical applications.
- Resistant to freeze-thaw cycles.
- High ageing resistance; provides permanent waterproofing even after many years.
- Can be used in areas subject to movement and vibration.
- Solvent-free, water-based and environmentally friendly.
Usage Areas
- On exterior surfaces, in horizontal and vertical applications from the positive side
- On reinforced concrete surfaces below ground and in continuous contact with water
- On surfaces such as foundations and retaining walls
- On retaining walls
- For waterproofing of planters
- For waterproofing of balconies and terraces against surface water (provided the surface is protected)
- In basements and similar underground structures
- For protection of concrete against groundwater and micro-organisms
Application Steps
- 1
Surface Preparation
The surface to be treated must be sound and free from all oils, grease, rust, paraffin, paint and bitumen residues that could impair adhesion; all loose particles must be removed. Iron and wooden plugs on the surface must be removed, and any active water leaks must be plugged with FOX PLUG FC340. Existing voids, uneven surfaces and corners/edges (chamfer of at least 4 cm) must be repaired with FOX MORTAR FC188 T (R4) repair mortar.
- 2
Priming
FOX MULTIPLUS® 2K FS542 component A is diluted with water at a ratio of 1/5 and mixed with an electric mixer at 400–600 rpm for 3–5 minutes. The prepared mixture is applied to the surface in a single uniform coat using a brush. Ponding must not be allowed in horizontal applications. The primer must be allowed to dry before proceeding with the waterproofing layer application. Primer consumption: 0.25 kg/m².
- 3
Mixing
Component B is slowly added to FOX MULTIPLUS® 2K FS542 component A while mixing with an electric mixer at 400–600 rpm and a T-shaped mixer attachment for approximately 3–4 minutes until the mixture is homogeneous, then left to rest for 2 minutes. It is then mixed again for 1 minute to make it ready for application. Mixing ratio: 24 kg component A + 8 kg component B. The prepared mixture must be consumed within 1 hour.
- 4
Waterproofing Application
After the primer has dried, the prepared FOX MULTIPLUS® 2K FS542 mixture is applied to the surface in two coats by brush or trowel at the specified consumption rates (1st coat: 1.50 kg/m², 2nd coat: 1.50 kg/m²). Backfilling of the foundation must be carried out only after the waterproofing coating has fully dried. Before backfilling, the surface must be covered with drainage boards or thermal insulation panels to protect against impacts and tears that may occur during backfilling.
- 5
Tool and Equipment Cleaning
Tools and equipment used after application must be cleaned with water. Once FOX MULTIPLUS® 2K FS542 has hardened, it can be removed from the surface mechanically using solvent.
FOX MULTIPLUS® 2K FS542 must not be applied if the ambient and surface temperature is below +5°C or above +30°C; application should be postponed until suitable temperatures are reached.
Application must not be carried out during rain or when rain is likely. Surfaces that have not fully cured must not be exposed to water.
FOX MULTIPLUS® 2K FS542 must be consumed within 1 hour of mixing.
FOX MULTIPLUS® 2K FS542 must be mixed using a T-shaped mixer attachment (400–600 rpm) as specified in the technical specifications section.
For exterior surface applications, the applied surface must be protected from sunlight, wind, rain and frost for the first 24 hours.
Particularly in extremely hot weather, the product may increase in consistency due to rapid water loss. To prevent this, water may be added at a rate not exceeding 3% of the total product quantity.
The working and reaction times of bitumen-rubber based systems are affected by ambient and substrate temperature as well as relative humidity. At low temperatures the reaction slows down; high temperatures accelerate the reaction.
The product must be stored in its original unopened packaging, in a cool and dry environment, protected from frost, between +5°C and +30°C. Shelf life is 12 months from the date of manufacture.
Approaching storage and application areas with open flame is dangerous; areas must be ventilated. Work clothing, protective gloves, goggles and a mask must be worn during application. Contact with skin and eyes must be avoided; in case of contact, wash thoroughly with plenty of water and soap. In case of ingestion, consult a doctor immediately.
Must be stored out of reach of children. Food and beverages must not be brought into application areas.
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