Permatex Fine Grade Engine Valve Grinding & Lapping Paste (100g)

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Achieve a precise, gas-tight cylinder head seal with professional-grade silicon carbide abrasive paste. Used and trusted by Bourne HPP in our own high-performance engine builds, Pe rmatex Fine Grade Engine Valve Grinding Paste (100g) is engineered specifically for precision valve seating, removing carbon deposits, and restoring critical mating surfaces. Featuring a specialised 180-grit silicon carbide formula suspended in a water-based compound, it delivers exceptional cutting control while leaving a uniform, burr-free finish to protect your engine's compression and horsepower. Key Features & Benefits Tested & Used by Bourne HPP: We rely on this exact compound in our own workshop for high-output engine prep and cylinder head servicing. 180 Grit Silicon Carbide (70 Microns): High-grade silicon carbide abrasive ideal for precision grinding and seating engine valves to achieve optimal gas-tight sealing without over-grinding. Water-Based Formula: Easy to apply and effortless to clean up. Rinses away completely with water to prevent abrasive particles from contaminating your valve guides. Integrated Corrosion Inhibitors: Formulated with active corrosion inhibitors that prevent oxidation on valves and valve seats during and after the lapping process. Technical Specifications Feature Details Part Number 12063 Manufacturer Permatex Container Size 100g (3.5 oz) Tube Grit Rating 180 Grit Silicon Carbide (70 Microns) Base Water-mixable Application Engine Valve Seating, Cylinder Head Servicing, Metal Surface Lapping Condition Brand New How to Lap Engine Valves Prep the Surface: Thoroughly clean the valve stem, valve guide, and seat area to remove grease and debris. Apply the Paste: Dab a thin, light layer of Permatex Fine Paste around the valve face. Lap the Valve: Insert the valve into its guide. Using a suction lapping tool, rotate the valve back and forth against the seat using light, steady pressure. Lift the valve occasionally to redistribute the paste. Inspect the Seat: Wipe both the valve face and seat clean with a damp cloth. Look for an unbroken, uniform, dull-grey ring across both mating surfaces. Clean Thoroughly: Wash all components thoroughly with hot water or degreaser before final assembly. Ensure all abrasive residue is completely removed from valve guides and surrounding engine parts. Show more