Epoxy resin is often used to fill any gaps between the bolt and the concrete, providing additional stability and preventing moisture from seeping into the foundation. This helps to prevent corrosion and rusting of the bolts, which could weaken their strength over time
Jiri George Drobny, in Fluoroelastomers Handbook (Second Edition), 2016
Preparation
Regular inspection and maintenance of spark plug wires and spark plugs are essential to identify signs of wear, damage, or deterioration. Proper replacement of worn or fouled spark plug wires and spark plugs is crucial for maintaining the efficiency and reliability of the ignition system. Adhering to recommended service intervals and using high-quality replacement components are essential for optimizing the performance and longevity of the vehicle's ignition system.
1. Sealing Element

Check the faces of the head and block for flatness. Alloy heads in particular can distort and then leak.
Most effective sealing is obtained with optimum shaft surface finishes. The sealing efficiency is affected by the direction of the finish tool marks and the spiral lead. Best sealing results are obtained with polished or ground shafts with concentric (no spiral lead) finish marks. If you must use shafts with spiral finish leads, they should lead toward the fluid when the shaft rotates.
M

spark plug gasket.
6. AMOUNT OF LUBRICANT: Seals perform better when lubricated but some machines will go through some dry spells. When this occurs using a leather or PTFE seal will be more beneficial as those type of seals can operate with less lubrication.