Bus and Coach

Innovative Technology for Customer Solutions

The global bus and coach industry is a dynamic and challenging environment. Bus and coach operators demand ever-lower vehicle operating and repair costs combined with improved reliability and durability. Government legislation is regulating lower vehicle emissions and improved passenger and driver safety. Sika, as supplier and partner to the global bus and coach industry, provides a range of state of-the-art technology solutions to assist manufacturers in meeting these challenges. As a speciality company for chemical products, we concentrate on our core competencies: bonding, sealing, damping and reinforcing.
As a globally operating company, we are partner to our customers worldwide. Sika is represented with its own subsidiaries in all bus and coach producing countries, thus ensuring first-class order handling and delivery, as well as application, technical and commercial support.

Solutions for Bus and Coach

Body Structure

Bus and coach manufacturers utilise a wide range of materials and processes in the assembly of the body structure. Sika provides a range of material technologies ideally suited to these challenging and diverse environments. Sika’s sealants and adhesives are easy to combine with other joining technologies. Flexibility, durability and a reduction in the number of spot welding points are just some of the advantages provided by sealing and bonding technology.
Sikaflex sealing materials are easy-to-use one-component formulations and provide good tooling properties.

Floor, Side panels and Luggage Doors

Bus and coach operators expect high levels of durability from their vehicles. Resistance to impact, extreme temperature conditions and round the clock operation make extreme demands on all areas of the vehicle.

Sika has formulated a range of elastic bonding solutions for floor and side panel assembly to enable vehicle manufacturers to satisfy these challenging demands. Sikaflex provide high-performance elastic assembly within an easy-to-use one-component formulation. Sikaflex hybrid technology provides the high performance of Sikaflex polyurethane systems combined with reduced substrate preparation and improved ecological benefits. SikaForce two-component polyurethane combines high strength with good flexibility. SikaFast two-component methyl methacrylate and ADP (Acrylic Double Performance) structural adhesives provide high strength and excellent impact resistance with low surface preparation.

Roof Bonding

Bus and coach manufacturers face particularly tough challenges for construction of roof assemblies for modern bus and coach vehicles. Apart from obvious requirements for long-term durability and resistance to harsh climates, additional requirements include lowest possible weight (vehicle handling and fuel economy), highest possible strength (roll-over resistance for occupant safety) and increased functional complexity (air conditioning units, sunroof apertures). Sika has developed a range of speciality formulations with ideal characteristics to enable vehicle OEM’s to meet these requirements with optimum quality, consistency and cost.

Sikaflex range provides high-performance easy-to-use one-component formulation with different mechanical properties to meet the various requirements. SikaForce two-component provides the high performance of polyurethane systems combined with long open time and process advantages.

Front and Rear Module

The last ten years have seen a dramatic improvement in the aerodynamics and styling of bus and coach vehicles. The front and rear modules of modern vehicles are two of the most visible indicators of such changes. The use of thermoset composites is now common for such applications, and has enabled big changes in vehicle styling and aerodynamic behaviour to be achieved. In addition to these changes, such applications must comply with ever-tougher durability, impact and ease-of-assembly requirements. Sika has formulated a range of materials to exceed customer requirements for this challenging application.

Sikaflex offers high-performance elastic assembly within an easy-to-use one-component formulation. Sikaflex hybrid technology provides the high performance of Sikaflex polyurethane systems combined with reduced substrate preparation and improved ecological benefits. Sikaflex Booster systems provides the high-performance attributes of Sikaflex, combined with rapid full cure due to the combination with Sika’s proprietary Booster system.  SikaFast two-component methylmethacrylate structural adhesives provide high strength and excellent impact resistance with low surface preparation.

Direct Glazing and Sealing

For over 20 years, Sika has been providing bus & coach, automotive, truck and rail OEM assembly lines with adhesive and sealant solutions for sealing, bonding and direct glazing. Primerless, manual and automated pretreatment options are available to fit the needs of a variety of OEM application processes in order to create significant cost savings and manufacturing process simplification.

Sika offers a wide range of adhesive technologies to suit all direct glazing applications. Specific Sikaflex solutions are available to suit cold, warm and hot application processes. Proprietary Sikaflex materials are capable of retaining the glass in position following installation, allowing for elimination of secondary clips, fixings and tape. Sikaflex materials can also provide low electrically conductive properties for elimination of galvanic corrosion/antenna signal loss. The SikaTack Plus Booster range provides the ultimate solution for OEM’s seeking excellent mechanical properties with the shortest possible full cure time. Unlike traditional two-component systems, this boosted one-component system has the significant benefit of full material cure irrespective of the presence of the accelerator paste, providing enhanced process/quality consistency and security.

Interior Trim

Vehicle owner operators have driven a significant increase in interior comfort and functionality in recent years, requiring the use of an increasingly diverse mix of interior plastics and fabrics. Performance requirements for interior components have increased, with higher operational temperature requirements, improved emissions/environmental performance needs and reduced component cost/cycle time in production. Sika has developed several solvent-based and water-based solutions to create strong adhesion to many substrates. SikaMelt, SikaTherm and SikaSense technologies are used in the lamination and bonding of a variety of interior applications including instrument panels, interior door trims, carpets, pillar trims, headliners, centre consoles, stowage bins and seat assemblies.

SikaMelt offers customers a range of formulations to meet a variety of substrate and process requirements. SikaMelt provides good initial green strength without pre-treatment, and is ideal for high-speed assembly operations.

SikaSense are solvent- and water-based adhesives used for floor covering applications and sound damping applications.            

Acoustic Management

Bus & coach operators and government bodies are demanding ever-lower standards of interior and exterior vehicle noise. Sika has formulated a high-technology solution to facilitate significant reductions in vehicle noise via absorption of vibration within the vehicle body.

SikaDamp products are lightweight, elastomeric, constrained layer vibration damping treatments that can be cut to any shape or size. SikaBaffle products are developed for anti-flutter purpose or as pre-shaped, thermoplastic or rubber-based molded product that leads to a significant increase of acoustic performance in the body shop. SikaGard spray-on technology is a unique, spray-applied damping solution designed to minimise interior noise through a flexible one-layer application. The spray-one material adheres to steel sheet or electrode position coating to ensure maximum corrosion protection and anti-stone protection.