Merbenit HM21
Merbenit HM21 - Merbenit HM21 is a flexible adhesive with excellent sealing properties. Thanks to its SMP base, it is suitable for a wide range of applications and offers exceptional durability.
Merbenit HM21 - Elastic adhesive with sealing properties.
Merbenit HM21 is an elastic adhesive with excellent sealing properties. Thanks to its SMP base, it is suitable for a wide range of applications and offers exceptional durability.
- Paint-compatible
- Easy processing
- High elasticity, good mechanical strength
- Long processing time
- Free of solvents, isocyanates, and silicones
Merbenit HM21 - Elastic adhesive with sealing properties
Merbenit HM21 is an elastic adhesive with excellent sealing properties. Thanks to its SMP base, it is suitable for a wide range of applications and offers exceptional durability.
product benefits
- Paint-compatible
- Easy processing
- High elasticity, good mechanical strength
- Long processing time
- Free of solvents, isocyanates, and silicones
- Low odor
- Chemically neutral curing system
- Non-corrosive to surfaces
- Shock- and vibration-resistant (shock-absorbing)
- Can be sanded and painted
- Very broad range of adhesion
- Excellent sealing properties
- For powder coating and thermal painting, up to +200°C for short periods
- consistent
Examples of use
Flexible and sealing bonding applications in the fields of metalworking, plant and machinery engineering, plastics, ventilation and air conditioning technology, as well as automotive, railcar, vehicle, and container manufacturing.
Adhesion spectrum
Excellent sealing properties Resistant to temperatures up to +200°C for short periods during powder and thermal coating Technical Data Chemical Basis Silane-modified polymer Curing Mechanism 1K moisture-curing Consistency, DIN EN ISO 7390 Stable, ≤ 3 mm Working time max. 30 min. Cure depth after 24 h ≥ 3.0 mm Cure depth after 48 h ≥ 4.0 mm Shore A hardness, DIN ISO 7619-1 45 Tensile strength, DIN 53504 S2* approx. 2.5 N/mm² Modulus at 100% elongation, DIN 53504 S2 * approx. 1.6 N/mm² Elongation at break, DIN 53504 S2 * approx. 350% Density 1.52 ± 0.05 g/cm³ Volume change, DIN EN ISO 10563 ≤ 5% Temperature resistance after curing -40 °C to +90 °C Processing temperature +5 °C to +40 °C Resilience, DIN EN ISO 7389, at 60% elongation ≥ 60% Permissible total deformation 25% All measurements were performed under standard conditions (23 °C and 50% relative humidity). * The data are based on measurements taken after 3 months. Application examples Flexible and sealing bonding in the fields of metal, apparatus, and mechanical engineering; plastics, ventilation, and air conditioning technology; and bodywork, railcar, vehicle, and container construction. Adhesion spectrum Suitable materials include metals, powder-coated, painted, galvanized, anodized, chromated, or hot-dip galvanized surfaces, various plastics, ceramics, stone, concrete, and wood. Due to the wide variety of different plastics and compositions, as well as materials prone to stress cracking, preliminary tests are recommended.
Standards & Certifications
- EMICODE EC1Plus
- Eurofins IAC Gold
product specifications
| Physical properties | |
|---|---|
| Color | black or white or gray |
| density | 1.52 g/cm³ |
| Hardness (Shore A) | 45 |
| Cured layer thickness after 24 hours | ≥ 3.0 mm |
| curing technology | Moisture-curing |
| Chemical group | Silane-modified polymer |
| product information | |
|---|---|
| container | 290 ml cartridge or 600 ml pouch |
| tensile strength | approx. 2.5 N/mm² |
| Temperature range (°C) | -40 °C to +90 °C |
| consistency | Stable, ≤ 3 mm |
| Performance at ultimate strength | |
|---|---|
| elongation at break | approx. 350% |
| Uncategorized | |
|---|---|
| processing temperature | +5 °C to +40 °C |
| Stress at 100% elongation | approx. 1.6 N/mm² |
| change in volume | ≤ 5% |
| Number of components | 1K |
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