Dekalin DEKASYL MS-1 black 290 ml - universal MS polymer sealant and adhesive for motorhomes, caravans and boats, primerless
- Elastic MS polymer sealant and adhesive for interior and exterior joints. UV and ageing resistant, free of solvents, isocyanates and silicone, 290 ml cartridge.
Dekalin DEKASYL MS-1 is a universal, permanently elastic MS polymer sealant and adhesive that cures with atmospheric moisture. The manufacturer intends it for interior and exterior sealing joints in motorhomes, caravans, buses and commercial vehicles, and for lighter bonding jobs where the joint does not carry high loads. Its low viscosity makes it as easy to apply as silicone, and it adheres to most common substrates without primer.
Key features
- Permanently elastic joint that copes with vehicle vibration
- Very good resistance to UV, water and ageing, suitable for outdoor use
- Primerless adhesion to PVC, glass, aluminium, paint, galvanised steel and polyester
- Free of solvents, isocyanates, silicone and PVC, paintable after skinning (test first)
- Low viscosity, easy to gun from the 290 ml cartridge
Use in motorhomes and caravans
In motorhomes and caravans DEKASYL MS-1 seals joints around doors and windows on the wall side, overlapping panels, GRP and aluminium profiles on painted walls, cable entries and lead-throughs, as well as joints inside the conversion, in the bathroom and in the kitchen. It is also suitable for minor bonding such as trims, covers and finishing parts.
The same product works on boats, cargo trailers, in vehicle building and in ventilation systems. If you need a stronger bonded joint, choose DEKASYL MS-2 or MS-5; for clear joints, choose DEKASYL MS-7.
DEKASYL adhesives and sealants are not a replacement for a plastic sealant under the flanges of roof lights, side windows and service doors that will have to be removed later. For such places the manufacturer specifies the non-curing DEKASEAL 8936.
How to use, step by step
- Clean and degrease both surfaces with DEKACLEAN Ultra or a DEKACLEAN Ultra cloth and let it flash off for about 3 minutes.
- On plastics and difficult surfaces apply a thin coat of DEKAVATOR 22 NF activator and wait about 5 minutes.
- Cut the cartridge tip, trim the nozzle at an angle to the required bead width and apply the compound with a manual or pneumatic gun at +5 to +35 °C.
- For bonding, join the parts within about 15 minutes of application (20 °C, 50% relative humidity) and press them lightly if needed.
- For sealing, tool the joint within about 10 minutes with a spatula wetted with DEKAFINISHER. Do not let the agent get under the compound, as this reduces adhesion.
- The compound cures with moisture from the air. It reaches full strength after a few days, depending on layer thickness, temperature and humidity.
What you get
- 1 x Dekalin DEKASYL MS-1 cartridge, colour black, content 290 ml
How to choose the right product
The DEKASYL range includes several MS polymer compounds that differ in hardness, elasticity and bond strength. The overview below is based on the manufacturer technical data sheets; the highlighted row is the product on this page.
| Product | Main job | Shore A hardness | Elongation at break | Skin time approx. | Service temperature |
|---|---|---|---|---|---|
| DEKASYL MS-1 | universal joint sealing and light bonding | 52 | 300% | 10 min | -40 / +100 °C |
| DEKASYL MS-2 | bonding and sealing with higher strength | 55 | 250% | 10 min | -40 / +100 °C |
| DEKASYL MS-5 | structural bonding: solar panels, SAT systems, spoilers | 55 | 210% | 12 min | -40 / +120 °C |
| DEKASYL MS-6 | soft, highly elastic joint on plastics | 32 | 600% | 30 min | -40 / +90 °C |
| DEKASYL MS-7 | transparent bonding and sealing | 40 | 250% | 35 min | -40 / +100 °C |
| DEKASYL MS-8 | windscreen bonding, drive-away time approx. 60 min | 58 | 300% | 10 min | -40 / +100 °C |
Safety at work
- Labelling according to the safety data sheet (version of 23.02.2024): EUH208: Contains a sensitising substance. May produce an allergic reaction. EUH210: Safety data sheet available on request.
- Read the label and the safety data sheet before use. Work in a well-ventilated area, wear protective gloves and, when working overhead, safety glasses.
- Keep out of reach of children. Dispose of residues and packaging in line with local regulations; do not pour into drains.
Storage and shelf life
Store in the tightly closed original packaging in a cool, dry place, protected from frost and direct sunlight. The best-before date is printed on the pack. Close an opened cartridge tightly and use it up soon, because the compound in the nozzle cures with moisture.
Matching products
- DEKASYL MS-1 white 290 ml - same product, other variant
- DEKAVATOR 22 NF 30 ml - adhesion activator for plastics
- DEKACLEAN Ultra 1 l - degreasing before bonding
- DEKAFINISHER 500 ml - smoothing joints
- DEKAtool cartridge cutter - clean opening of cartridges
Technical data
| Parameter | Value |
|---|---|
| Product | Dekalin DEKASYL MS-1 |
| Base | MS polymer, moisture curing |
| Colour | black |
| Content | 290 ml |
| Skin time (20 °C, 50% RH) | approx. 10 min |
| Open time for bonding | up to 15 min |
| Shore A hardness | 52 |
| Elongation at break | 300% |
| Tensile strength | 2,2 MPa |
| Temperature resistance when cured | -40 to +100 °C |
| Application temperature | +5 to +35 °C |
| Density | 1,5 g/cm³ |
| Curing speed | approx. 3 mm / 24 h |
| EAN | 4046085626137 |
Frequently asked questions
Is DEKASYL MS-1 suitable under a roof light?
Not as the only flange seal. For roof lights, side windows and service doors the manufacturer specifies the plastic sealant DEKASEAL 8936, which allows the part to be removed later. MS-1 is suitable for finishing joints around them.
Can MS-1 be painted?
Yes, once a skin has formed most paints adhere well. The manufacturer recommends a test with the chosen paint first.
How does MS-1 differ from MS-2?
MS-1 is a more universal sealant with lower viscosity. MS-2 has higher tensile and shear strength, so it is the better choice where the joint must also bond strongly.
About Dekalin
Dekalin is a German brand of adhesives, sealants and protective products used for years by motorhome and caravan manufacturers and by caravan workshops. Technical data sheets and safety data sheets are available on the manufacturer website dekalin.de.