The materials used on cylinder head and manifold gaskets are a blend of non-asbestos materials like Kevlar ® (a synthetic aramid fiber developed by Dupont ) or Graphoil ® (a natural graphite). ROL uses POWERSEAL, a high temperature, ultraviolet (UV) cured silicone based compound that provides a lifetime seal.

 

exceptional deal for these Rol quality gaskets!

 

Buy this at this low price for replacement in the future!

 

 

ROL supplies engine rebuilders and car manufacturers.

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ROL manufactures gaskets, they are sold under brands such as Iseal, Detroit, Pronto, Corteco, PartsMaster, DC, and many private labels.

All gaskets are made in North America and are supplied to American car manufacturers!

 

ROL Engineers examine critical dimensions of the gasket. First they look at the compressed thickness of the gasket. From years of testing and design they know that a typical composite gasket compresses approximately ten percent during the torguing stage of installation. The Engineers also know that during the teardown and rebuilding process the cylinder head and/or block is resurfaced to remove any imperfections and distortions that may have occurred during operation of the engine. In order to restore the geometry of the mating surfaces to the original OE specifications, ROL Engineers make the gasket thickness slightly greater for aftermarket use.Secondly, they look at the bore size. In some severe duty situations, the cylinders of a rebuilt engine must be bored and enlarged to clean them up. In order to allow for this, the bore sizes on the gasket for aftermarket use are enlarged slightly to accommodate any over boring. This is only done after careful consideration is given to the effects on emission standards and operating temperatures.