Description Bostik Simson ISR 70-03 Black / White – 290ml Cartridge Elastic Structural Adhesive & Sealant Bostik Simson ISR 70-03 is a high-performance elastic structural bonding adhesive & sealant based on MS polymer technology, developed for demanding transport, fabrication and industrial assembly applications. Designed for panel bonding, vehicle builds and structural sealing, ISR 70-03 forms a durable, permanently elastic joint that accommodates movement while maintaining strong adhesion across a wide range of substrates. With up to 20% movement capability, excellent UV and weather resistance, and strong gap-filling properties, it is ideal for applications where vibration, thermal expansion and dynamic loads must be absorbed without joint failure. Unlike rigid adhesives, ISR 70-03 provides a flexible structural bond, making it particularly effective for bonding metals, painted surfaces, GRP, polycarbonate, glass and rubber in transport and construction environments. Its paint compatibility (wet-on-wet) and high slump resistance also make it suitable for visible joints and vertical applications where finish and control are critical. ✅ Key Benefits ✔ Elastic structural bonding adhesive with 20% movement capability✔ Strong adhesion to metals, GRP, painted surfaces, glass & plastics✔ Permanently flexible – absorbs vibration and dynamic loads✔ Excellent UV & weather resistance for long-term durability✔ Paintable (wet-on-wet) with industrial coatings✔ High slump resistance – suitable for vertical and gap-filling joints✔ Good chemical resistance and ageing performance✔ Suitable for indoor & outdoor industrial use �� Typical Applications Panel bonding in vehicle bodies, trailers and transport builds Bonding roof panels, side panels and structural components Bonding GRP / composite panels to metal frames Sealing and bonding sunroof and glazing systems (non-direct glazing) Elastic bonding of structural joints subject to movement Sealing welded seams and fabrication joints Bonding aluminium profiles and corner sections ⚠️ Important Notes Not suitable for PE, PP or PTFE without surface treatment For joints exposed to frequent water contact on metals, primer may be recommended Designed for elastic structural bonding, not rigid load-bearing joints �� Technical Overview Base: MS Polymer (moisture curing) Movement Capability: ~20% Elongation at Break: ~270% Tensile Strength: ~2.7 MPa Shore A Hardness: ~55 Skin Time: ~20 minutes Cure Rate: ~3–4mm per 24 hours Temperature Resistance: -40°C to 100°C Short Term Peak: up to 180°C
