Effisus Stopper M-1
High-Performance Structural Adhesive and Sealant
Effisus Stopper M-1 Sealant is a moisture-curing, solvent-free adhesive and sealant designed for superior performance in damp, dry, or cold conditions. With strong adhesion to most construction materials, it remains permanently flexible without shrinking, bubbling, or discolouring under UV exposure.
Roof Penetration & Profile Sealing
Expansion Joint Sealing
Vertical Joint Sealing
Effisus Stopper M-1 Sealant is a solvent-free, moisture-curing adhesive designed for superior performance in damp, dry, or cold conditions. It adheres strongly to most construction materials and remains permanently flexible without shrinking, bubbling, or discolouring under UV exposure.
Ideal for sealing joints, cracks, and penetrations, it can be used alone or as part of the Effisus Stopper System, providing long-lasting, watertight protection in any environment.
Effisus Stopper M-1 is compatible with a wide range of substrates, including EPDM and modified bitumen, aluminium, galvanised metal, fibreglass, engineered plastics, PVC, glass, FRP, timber, EIFS, blockwork, brick, EPS foam, concrete and stone.
Easy to apply and quick to clean, it cures even at low temperatures and delivers a professional, maintenance-free seal every time.
| Characteristics | Method | Result |
|---|---|---|
| Material | – | Polyether |
| Colour | – | Grey |
| Gun grade | – | Zero Slump |
| Viscosity | Brookfield RVF TF Spindle, 4 RPM, 23ºC | 1.200,000cp +/-400,000cp |
| Density | ASTM D1475 | 1,43 g/cm3 |
| Tensile elongation | EN 12311-2 B | ≥ 350% |
| Tack free time | 45 +/- 5% R.H. | 35 min +/- 10 min |
| Elongation at break | ASTM D412 | 525% |
| Hardness Shore A | ASTM C661 | 45 |
| Tensile strength | ASTM D412 | 2,55 N/mm2 |
| Shear strength | ASTM D1002 | 2,69 N/mm2 |
| Tear strength | ASTM D624 | 19,44 N/mm |
| Low temperature flex | ASTM D522 | Pass -26ºC 0,64cm mandrel |
| Shrinkage | – | No visible shrinkage after 14 days |
| Service temperature | – | -40ºC to +93.3ºC |
| Fire classification | ASTM E84 | Class A |
