For high-load installations, vertical panels, and joints subject to constant vibration or deformation, Xtraseal MS-609 MS Polymer Adhesive provides an immediate 1-second grab without requiring temporary supports for most lightweight components. This single-part, moisture-curing hybrid polymer remains permanently elastic after curing and adheres reliably to dry and slightly damp substrates alike.
What it does
Xtraseal MS-609 functions as both a high-strength structural adhesive and an elastic sealant. Its hybrid MS polymer chemistry delivers high shear and tensile strength without the use of primers on most construction materials. Because it contains no isocyanates or silicones, it will not corrode galvanized or zinc-coated steel, nor will it degrade concrete. The formulation is low-odour, meets "Green Star" environmental criteria with a low VOC content of 38 grams per litre, and is compatible with water-based paint systems once cured.
Numbers that matter
-
1-second immediate grab: Provides instant wet hold, minimising the need for mechanical bracing on vertical installations.
-
1.1 MPa lap shear strength (ASTM C961): Resists high-stress forces on bonded structural elements.
-
200% elongation at break (ASTM D412): Accommodates thermal expansion and mechanical vibration without tearing.
-
Up to 400 kg/m² wet strength: Sustains heavy initial loads immediately upon application.
-
-40°C to +100°C temperature resistance: Maintains its physical bond and seal properties across extreme environmental service conditions.
Where to use it
Xtraseal MS-609 is suitable for internal and external applications across construction, commercial sign installation, transport, and manufacturing industries. It bonds to the following substrates:
- Laminated kitchen benches, MDF, chipboard, and wood.
- Aluminium, galvanized steel, powder-coated metals, and most other metals.
- Enamel, glass, porcelain, ceramic, and glazed tiles.
- Plaster, stone, and concrete.
- Polystyrene, PVC, fibreglass, polyester, and epoxy.
Limitations
-
Do not use in totally confined spaces: The adhesive requires atmospheric humidity to vulcanise; it will not cure in completely sealed or closed rooms.
-
Do not use in aquariums or for structural glazing applications where dedicated glazing silicones like N-80 or N-60 are required.
-
Avoid contact with bitumen, tar, EPDM, neoprene, and butyl to prevent plasticiser migration, which causes discolouration and loss of adhesion.
-
Avoid contact with uncured polyurethanes during the curing process.
-
Substrate limitations: May discolour copper and brass. Plastics such as polyacrylate and polycarbonate require a preliminary compatibility test before application.
-
Alkyd paints: Drying times of alkyd resin-based paints may increase when applied over this adhesive.
-
Cure restrictions: Do not expose the bond to thermal, mechanical, or chemical loads before complete vulcanisation.
Installation and usage
Apply the adhesive at temperatures between 5°C and 40°C. For optimal performance, use a triangular nozzle to gun beads spaced 5 cm to 10 cm apart. Apply the adhesive with the caulking gun held at a 90-degree angle to stand a triangular bead twice as high as its width.
Press the components together while the adhesive is wet, ensuring a minimum bond line thickness of 2 mm. This minimum thickness is critical to allow the elastic properties of the polymer to function. Although the adhesive provides an instant grab, heavy or highly stressed elements require mechanical support until the adhesive cures.
For critical high-performance applications, multi-storey facades, or extreme weather exposures, prepare non-porous substrates with Adheseal 50A surface prep (allowing 30 minutes to 2 hours drying time). Prime porous substrates such as concrete, renders, and brick with Everflex Supaprime. Concrete must be cured for at least 28 days before application.
Cure and clean up
The adhesive has a skin time of 10 to 30 minutes and cures at a rate of 2 mm per 24 hours at 23°C and 50% relative humidity. Clean up wet spills and tools immediately using white spirits. Cured adhesive cannot be dissolved and must be removed by mechanical scraping or cutting.