004403007 Subaru THREE BONDO 1215, Price: 37.85$, Weight: 0.522kg

Precision Sealant Bond for Subaru Engine & Drivetrain Assembly

This high-quality bonding sealant is used to create a tight, oil-proof and coolant-safe seal between metal surfaces during assembly. Subaru technicians commonly apply it on mating faces where a normal paper gasket is not used, or where extra sealing strength is required. It helps stop micro-leaks that can appear after heat cycles and vibration.

Why This Part Is Needed ✅

Engine and gearbox casings expand and contract with temperature. This sealant fills tiny surface scratches and machining pores, preventing seepage of oil, coolant, or transmission fluid. It also improves long-term reliability on flanges, covers, and joint seams.

How It Works ⚙️

Once applied as a thin bead, it cures into a flexible, durable film. The cured layer stays slightly elastic, so it can absorb vibration and movement without cracking. Proper curing forms a continuous barrier that blocks fluid paths and keeps internal pressure stable.

If It Fails or Is Missing

A damaged or incorrectly applied sealant can lead to wet joints, slow drips, burning oil smell on hot surfaces, low fluid levels, and in severe cases overheating or bearing damage. Leaks can also contaminate belts, sensors, and mounts, causing extra repairs.

Installation Tip ️

Clean and dry both surfaces fully, apply a consistent thin bead, and tighten fasteners in the correct sequence for an even seal.