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1C liquid plastic, hybrid, solvent-free
1-component, solvent-free liquid plastic for standard-compliant sealing in odour-sensitive areas.
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Würth FLK 275 LF is a solvent-free, UV-resistant and highly durable 1-component hybrid (SMP) liquid sealant. Once cured, it forms a seamless, durable, hydrolysis-resistant and breathable sill membrane. FLK 275 LF is ideal for vertical surfaces, inclines and connecting work.
It cures by reacting with moisture in the air and substrate.
Advantages
- Ready to use for easy application
- Minimal odour during application and tested in accordance with EMICODE EC1 PLUS
- Forms a seamless, joint-free and highly elastic membrane
- Adhesion over the entire surface
- Resistant to hydrolysis, frost and UV radiation
- High thermal resistance without softening and frost resistance between -30 °C and +90 °C
- Breathable (water vapour permeable)
- Complies with Austrian standards B3691 (with reinforcement) and B3692
- For sealing wet rooms in accordance with Austrian standard B3407
- Resistant to cleaning agents, household chemicals, oils and seawater
- Easy to repair after mechanical damage
Consumption
Around 2.8 kg/m² in two layers with fabric inlay (110 g/m²)
The amount is based on the practical application by applying with a roller on a smooth surface under optimum conditions. Factors such as surface porosity, temperature, humidity, application procedure, application and fabric inlay may result in more or less product being used.
ETAG 005: ETA-19/0108. Certified safety in accordance with the general test certificate from German construction authorities (AbP) for roof sealing.
General test certificate from German construction authorities (AbP) in accordance with building waterproofing.
Fire protection
B(ROOF)(t1), B(ROOF)(t2), B(ROOF)(t3), B(ROOF)(t4) in accordance with DIN EN 13501-5
Class E in accordance with DIN EN 13501-1
Würth FLK 275 LF is a versatile product.
- Sealing flat roofs, balconies and terraces
- Sealing inclines and connections
- Sealing and connecting bitumen sheets and EPDM and PVC roofing membrane
- Protective layer for polystyrene and PUR spray foam
- Sealing pre-fabricated concrete parts
- Sealing wet rooms in accordance with Austrian standard B3407 (compound sealing in indoor areas)
- Second sealing layer in window construction
Surface preparation:
Careful preparation of the surface is essential to ensure an optimal result and long service life.
The surface must be dry and free of grease, dirt and dust. Any loose parts must be carefully removed. The substrate moisture content should not exceed 5 %.
Primer:
Prime using Würth LF adhesion primer: PVC roofing membranes, bituminous cold self-adhesive membranes, and PVC window or door frames.
Prime metal substrates such as zinc, zinc plated sheet metal and steel with Rust-Stop Quattro.
Apply the primer as specified in the data sheets and allow it to dry.
Application:
Remove the protective film from the container and stir the Würth FLK 275 LF with an agitator at a low speed before use.
Apply 2/3 of the sealant to the prepared substrate using a roller. Lay the cut-to-size fleece on top of the sealant, then apply the remaining 1/3 of the sealant with a roller.
Once opened, containers should be used up as soon as possible. If a skin has formed on the product in the bucket, this can be removed and the remaining product used as normal.
An additional coat can be applied up to 24 hours after the work is completed without any further preparation. After 24 hours, the dry surface will need to be roughened before application. Alternatively, dry quartz sand can be applied while the layer is still wet to allow further work without roughing.
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