Transport & Automotive Gaskets & Seals

Rocker cover gaskets, oil pan seals, inlet manifold gaskets, and exhaust flange rings. Materials face continuous oil immersion at 120–150 °C, combustion blowby, and engine speeds from 600–6 000 rpm. Multi-layer steel (MLS) head gaskets handle the highest pressures; compressed non-asbestos fibre (CNAF) and cork-rubber composites cover ancillary joints.

Battery pack enclosures sealed to IP67 or IP68. Water ingress at any point risks thermal runaway. Closed-cell silicone foam gaskets line the lid-to-tray joint, while EPDM and HNBR O-rings seal glycol-based battery thermal management circuits running at 60–80 °C. Dielectric properties matter: gasket materials near bus bars must not conduct.

Radiator header gaskets, thermostat housing seals, heater core O-rings, and oil cooler plates. EPDM dominates coolant circuits — ethylene glycol attacks NBR and neoprene over time. Oil circuits use FKM or HNBR for combined heat and hydrocarbon resistance. Cabin HVAC relies on closed-cell foam strips to prevent air bypass.

Door frame seals, windscreen bonding gaskets, body panel edge trim, and vibration isolation mounts between cab and chassis. EPDM dominates weather seals for UV and ozone resistance in Australian conditions. NVH (noise, vibration, harshness) pads use closed-cell foams with controlled compression set to maintain damping force over 10+ years in typical road service.

Mining haul trucks in the Pilbara endure 50+ °C ambient and continuous vibration. Linehaul prime movers run around the clock across thousand-kilometre routes. Both duty cycles demand seals that hold up where a workshop visit is days away.

Euro VI emissions under Australian Design Rule (ADR) 80/04 — effective November 2024 for new models, November 2025 for all new heavy diesel — mandates DEF/AdBlue urea injection. Standard NBR and HNBR (hydrogenated nitrile) degrade on urea crystallisation at the injector, so selective catalytic reduction (SCR) dosing lines need PTFE or fluoropolymer seals. Exhaust manifolds use graphite-faced or compressed-graphite plus multi-layer-steel constructions to handle exhaust gas recirculation (EGR) back-pressure cycling.

Assembly lines at PACCAR (Bayswater) and Volvo (Wacol) require PPAP (Production Part Approval Process) documentation under IATF 16949. We can support that.

Sydney Metro, Melbourne Metro Tunnel, and the Inland Rail corridor are driving rolling-stock gasket demand. Compliance sits under AS 7501:2019, with AS 5100 bridge-loading referenced for tunnel and viaduct service. Bogie-mounted air-brake systems use peroxide-cured EPDM diaphragms for compressed-air dryers; vacuum-brake legacy fleet (heritage and outer-suburban) uses NBR brake-cylinder seals. Regenerative-brake actuators on modern EMU (electric multiple unit) trains need silicone diaphragms with low compression set. Aurizon, Pacific National, Sydney Trains, and V/Line overhaul on 8–12 year cycles — and kit-up volumes and lead time, not unit price, are the procurement constraint.