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Merbenit SF50
Permanently elastic 1K-SMP adhesive with particularly fast strength development.
Permanently elastic 1K-SMP adhesive with particularly fast strength development even at low temperatures — Minergie-ECO + eco-bau ECO-BKP 1st priority
HS code:
3214.1000
Merbenit SF50 is a permanently elastic 1K-SMP adhesive with particularly fast strength development even at low temperatures — Minergie-ECO + eco-bau ECO-BKP 1st priority.
Silane-modified polymers (SMPs) are modern, high-performance adhesives—moisture-curing, solvent-, isocyanate-, and silicone-free, with a very broad adhesion spectrum to metals, painted and galvanized surfaces, engineering plastics, glass, ceramics, concrete, stone, and wood. They are paintable, corrosion-resistant, shock- and vibration-resistant, and low-odor. SF50 is a specific variant of the Merbenit SMP series—its key properties and applications are described below.
Merbenit SF50 is characterized by exceptionally rapid strength development—even at low temperatures and on moisture-impermeable materials. High final strength (Shore A 50). Ideally suited for Minergie-ECO certified construction projects with eco-bau ECO-BKP 1 priority.
What makes SF50 stand out
What is SF50 used for?
processing
Recommended accessories
SF50 compared to related Merbenit products
Direct comparison of mechanical and processing values — all data from the official Merbenit TDS.
SF50 Current product |
HM21 → | HT50 → | HS60 → | |
|---|---|---|---|---|
| Networking system | 1K moisture-curing | 1K moisture-curing | 1K moisture-curing | 1K moisture-curing |
| consistency | stable | stable, ≤3 mm | stable | stable |
| Shore A hardness | A 50 | A 45 | A 45 | A 60 |
| Tensile strength | 3.4 N/mm² | 2.5 N/mm² | 2.5 N/mm² | 3.3 N/mm² |
| Elongation at break | 200 % | 350 % | 200 % | 250 % |
| Module 100% | 2.2 N/mm² | 1.6 N/mm² | 1.5 N/mm² | 2.3 N/mm² |
| Processing time | 8 min | 30 min | 10 min | 10 min |
| Curing time: 24 hours | ≥3.5 mm | ≥3.0 mm | 2.5 mm | ≥2.0 mm |
| Curing time: 48 hours | ≥4.5 mm | ≥4.0 mm | 4.0 mm | ≥3.0 mm |
| density | 1.40 | 1.52 | 1.48 | 1.54 |
| Temperature range | -40 / +90 °C | -40 / +90 °C | -40 / +90 °C | -40 / +90 °C |
| Change in volume | ≤7 % | ≤5 % | ≤4 % | ≤8 % |
| Main application | Minergie-ECO building projects | Metal construction | Instant adhesives | Food industry |
Technical data for Merbenit SF50
| Product information | |
|---|---|
| Tensile strength | approx. 3.4 N/mm² |
| Temperature range (°C) | -40 °C to +90 °C |
| Container | 290ml cartridge, 600ml bag |
| consistency | Stable |
| Performance at final strength | |
|---|---|
| Elongation at break | approximately 200% |
| Physical properties | |
|---|---|
| density | 1.40 g/cm³ |
| Hardness (Shore A) | 50 |
| Chemical group | Silane-modified polymer |
| Color | black, white, grey |
| Cured layer thickness after 24 hours | ≥ 3.5 mm |
| curing technique | Moisture-curing |
| Generally | |
|---|---|
| Processing temperature | +5 °C to +40 °C |
| Tension at 100% elongation | approx. 2.2 N/mm² |
| Change in volume | ≤ 7% |
| Number of components | 1K |
For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.
Frequently asked questions about SF50
Practical application and design questions — answered by SILITECH.
Merbenit SF50: Permanently elastic 1K-SMP adhesive with particularly rapid strength development even at low temperatures — Minergie-ECO + eco-bau ECO-BKP 1st priority. Main applications: Minergie-ECO building projects, construction, metal construction and mechanical engineering.
SMP = Silane-modified polymer. This modern class of adhesives combines the advantages of silicone (elasticity, weather resistance, broad adhesion spectrum) and polyurethane (mechanical strength, paintability) — without their disadvantages (silicone: not paintable, corrosion on some metals; PU: isocyanates, often problematic indoors). SMP adhesives are solvent-, isocyanate-, and silicone-free, paintable, corrosion-resistant, and adhere to most substrates without a primer — except PE, PP, PTFE, and silicones.
SF50 adheres to metals (aluminum, stainless steel, steel), powder-coated and painted surfaces, galvanized/anodized/chromated/zinc-coated substrates, many plastics, ceramics, stone, concrete, crepi, wood, and glass. Not suitable for: PP, PE, PTFE (Teflon), silicones, and bitumen substrates. For critical material pairings, we recommend a preliminary test or application with a primer (V40 for smooth, V21 for absorbent substrates).
Store in the unopened original container in a dry, cool place — typically between +5 and +30 °C. Consult the Safety Data Sheet (SDS) before use. Observe the expiry date on the packaging. Use opened cartridges quickly — skin formation in the nozzle will block further application.
In the comparison table above, you will find related Merbenit products with different properties—different hardness, pot life, elongation at break, or special certifications (IMO, EN 45545-2, FMVSS 212, ISEGA, Minergie-ECO). If you are unsure which product is best for you, we would be happy to advise you—contact SILITECH with your specific application (substrate pairing, desired hardness, processing workflow, certification requirements).
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Our technical team will advise you personally on material selection, processing questions, and individual requirements. Quickly and competently.
Product specifications
| Product information | |
|---|---|
| Container | 290ml cartridge or 600ml bag |
| Tensile strength | approx. 3.4 N/mm² |
| Temperature range (°C) | -40 °C to +90 °C |
| consistency | Stable |
| Performance at final strength | |
|---|---|
| Elongation at break | approximately 200% |
| Physical properties | |
|---|---|
| Color | black or white or grey |
| density | 1.40 g/cm³ |
| Hardness (Shore A) | 50 |
| Chemical group | Silane-modified polymer |
| Cured layer thickness after 24 hours | ≥ 3.5 mm |
| curing technique | Moisture-curing |
| Uncategorized | |
|---|---|
| Processing temperature | +5 °C to +40 °C |
| Tension at 100% elongation | approx. 2.2 N/mm² |
| Change in volume | ≤ 7% |
| Number of components | 1K |
| Keywords | |
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Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: