Flexible Adhesives and Sealants
Silicones – MS polymers – Solvent-based sealants
The flexible adhesives and sealants from DREI BOND are particularly suitable for applications in which the dynamic load capacity of the adhesive connection is in the foreground. The elasticity of the connection allows deformations between the adhesive surfaces to be compensated and thus prevents ex. material fatigue and leaks.
Due to the properties mentioned, flexible adhesives and sealants from DREI BOND can be used in a variety of ways, ex. as a joint seal in the exterior and interior or as a surface sealant in engines and transmissions.
Silicones
Silicones are particularly characterized by their very high temperature resistance of up to 250 ° C. In addition, they have both a high elongation at break and generally very good chemical resistance.
MS polymers
Despite their very low hazard potential (white safety data sheet), MS polymers have both very high tensile strength and elongation at break. In addition, they have a generally good chemical resistance and are superior to other sealants, especially with regard to oil resistance.
Two-component (boosted) variants are available to enable curing regardless of the climatic ambient conditions.
Solvent-based sealants
The solvent-based sealants are not only characterized by their very high elongation at break, but also by their generally high chemical resistance. Due to the relatively high proportion of non-polar solvents, they have an extraordinary tolerance towards oily (non-polar) surface contamination.
Flexible Adhesives and Sealants
| Name | Description | Color | Viscosity [mPas] | Temperature Range [°C] | Skin Formation Time [min] | Tensile Strength [MPa] | Elongation at Break [%] | Special Features | Container [ml] | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1209 | silicone, neutral (oxime) | transparent | stable | -55 up to +200 | 10 - 15 | 4.1 | 300 | 30, 310 | Request Product Sheet | |
| 9120 | MS-Polymer | black / white / gray | pasty, can be applied with a trowel, good stability | -40 up to +90 | 20 | 1.9 | 300 | white MSDS | 290, 25000 | Request Product Sheet |
| 9125 | MS-Polymer | black / white / gray | pasty, can be applied with a trowel, good stability | -60 up to +80 | 25 | 2.8 | 500 | white MSDS | 300, 25000 | Request Product Sheet |
| 9125 2K | MS-Polymer (10:1) | black / white / gray | pasty, can be applied with a trowel, good stability | -40 up to +90 | 20 - 60 | 2.6 | 450 | 490, 25000 | Request Product Sheet | |
| 9150 | MS-Polymer | transparent | pasty | -40 up to +90 | 10 | 3 | 300 | 310 | Request Product Sheet | |
| 9160 | MS-Polymer | black / gray | pasty, can be applied with a trowel, good stability | -40 up to +120 | 10 | 3.2 | 400 | good oil compatibility | 310, 25000 | Request Product Sheet |
| 9160 2K | MS-Polymer (10:1) | black / gray | pasty, can be applied with a trowel, good stability | -40 up to +120 | 10 - 28 | 2.8 | 350 | excellent oil resistance | 490, 25000 | Request Product Sheet |
Note on curing: On average 3mm on the 1st day, longer thereafter. Depending on the substrate, temperature, humidity, gap *Container (PU): 30ml (50), 50ml (10), 300ml (12) | ||||||||||
| Name | Description | Color | Viscosity [mPas] | Temperature Range [°C] | Skin Formation Time [min] | Tensile Strength [MPa] | Elongation at Break [%] | Special Features | Container [g] | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1104T | solvent-based sealant | gray | 40000 - 80000 | -50 up to +130 | 8 | 2 - 4 | 450 - 650 | thixotropic | 300, 20000 | Request Product Sheet |
| 1108 | permanently ductile sealant | blue | > 1000000 | -55 up to +120 | non-curing | - | - | white MSDS | 50, 100, 300, 25000 | Request Product Sheet |
Note on curing: On average 3mm on the 1st day, longer thereafter. Depending on the substrate, temperature, humidity, gap | ||||||||||
F.A.Q.
What are flexible adhesives?
This category of adhesives includes silicones, MS polymers and solvent-based sealants. When cured, they have a very high elasticity and show rubber-elastic-flexible behavior.
When are flexible adhesives used?
Flexible adhesives are mainly used in applications where the adhesive must compensate for the deformation of the components in relation to each other. This is particularly the case when the components have different thermal expansion, are exposed to mechanical loads, etc. The most important areas of application include exterior and interior joint seals as well as surface seals in engines and gearboxes.
What are the properties of flexible adhesives?
Flexible adhesives are characterized by a high elongation at break and comparatively low tensile strength, making them ideal for bridging large gaps and compensating for different component expansions. Silicones also offer a very high temperature resistance of up to 250
°C. MS polymers have a relatively high tensile strength and generally excellent oil resistance. Solvent-based sealants have a good tolerance to slightly oily surfaces.
How quickly and under what circumstances do flexible adhesives cure?
Typical silicones and MS polymer-based sealants are single-component products and cure under the influence of atmospheric humidity via a polycondensation reaction to form a cleavage product. The curing speed depends primarily on the relative humidity and temperature. As the moisture penetrates the sealant via the contact surface with the air, curing progresses from the outside to the inside and is limited to a curing depth of approx. 10 to 15 mm. There are also flexible adhesives that cure by mixing two components, heat or UV light. With solvent- based adhesives, the transition from the liquid to the solid state takes place through the evaporation of the solvents. The less volatile they are, the longer they take to cure and the longer they can be processed. They also exhibit relatively high shrinkage during solidification.