What is AFM?
Why does Cometic recommend MLS gaskets to be installed dry?
Can MLS head gaskets be used with motors setup with o-rings or receiver grooves around the cylinder bores?
What surface finish is required to us an MLS head gasket?
What head bolt/stud torque do you recommend when using an MLS gasket?
What is EST?
What is MLS?
Does Cometic have a Rider Support Program?
Can I order head gaskets with a different bore size than you have in your catalog?
Can I order a head gasket with a different thickness than you have in your catalog?
How do I become a Dealer?
How do I return a gasket or gasket kit? What is an RGA number?
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AFM is a chemically blown, compounded nitrile synthetic rubber, bonded to an aluminum core with temperature resistance of over 2500 F. AFM material does not require gasket sealers or silicone bead. Re-torque is NOT required.
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Cometic Multi-Layer Steel (MLS) head gaskets go on dry because they are coated with a sealant. Each MLS head gasket is coated with a .001" thick viton rubber that is bonded to the outer stainless steel layers. Adding an additional sealer can hinder the performance of an MLS head gasket.
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No. MLS head gaskets require smooth, flat and true head and deck surfaces to seal. Most of the time with o-ring setups the wire and groove fall where our gasket’s combustion seal is located; therefore, the wire will hold the gasket and not allow proper compression while the receiver grooves allow combustion gases to escape.
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A surface finish of 50 RA (roughness average) or finer, is recommended for a proper gasket seal. Anything rougher may conflict with the gasket design.
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When using MLS head gaskets always refer to the manufacturer of the fastener to determine accurate torque values.
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| EST stands for Extreme Sealing Technology. EST in street bike applications refers to a line of head gaskets. Street EST head gaskets are .018” thick 2-layer head gaskets. Compared to the current market, our EST head gaskets are very competitively priced. EST in mx/dirt and ATV applications refers to a line of 4-stroke complete and top end kits. EST mx/dirt and ATV kits contain components (such as MLS head gaskets, steel viton coated base gaskets, valve stem seals, o-rings, cam chain tensioner gaskets, and washers) required for a total rebuild. Because of the hi-tech components EST kits are more expensive than standard kits EST in Harley-Davidson® applications refers to a line of gasket kits. EST Harley-Davidson® gasket kits contain: MLS head gaskets, steel viton coated base gaskets, blue viton valve stem seals, AFM material, race style exhaust gaskets and one piece rocker box base gaskets. The race style exhaust gaskets will not fray into the port; while the one piece rocker box base gaskets, seen in the Evolution EST kit, are made from a single layer .020” embossed vition coated steel. Because of the hi-tech components EST kits are more expensive than standard kits.
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MLS stands for Multi-Layer Steel. MLS head gaskets are comprised of three layers of stainless steel. The outer layers are an embossed viton coated stainless steel providing a superior seal with excellent rebound characteristics and are corrosive resistant. MLS head gaskets reduce bore distortion and withstand extreme cylinder pressures.
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Yes. If you would like to be considered for our Rider Support Program please mail in a Rider Support Application along with your resume. Click here to download application. All applications are accepted by mail only. Rider Support Programs are determined on an individual basis. Rider Support is good for one year, after one year all rider support must be re-submitted for approval. 2007 Rider Support Applications will be accepted September 1st 2006 until December 31st 2006. Contracts will be sent out no later than March 1st 2007. Race photos must be submitted with contract otherwise contract is void.
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Yes. Call Cometic with the engine type or Cometic standard part number (search online or in our catalog) along with the bore size you would prefer and we will create your custom gasket. (800-752-9850 or 440-354-0777)
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Yes. Call Cometic with the engine type or Cometic standard part number (search online or in our catalog) along with the thickness you would prefer and we will create your custom gasket. (800-752-9850 or 440-354-0777)
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Current and accurate information is necessary to establish an account with Cometic Gasket. Please complete the Dealer / Jobber application form entirely. Click here to download form. For dealer pricing to apply a Resale/ Vendor License Number or Federal Tax ID Number must be included. Companies within Ohio will also be required to include their tax exempt number.
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As stated on all Cometic invoices returns must be authorized and issued an RGA number. To obtain an authorized RGA number please contact our Returns Department. Only catalog / stock items can be returned (custom gaskets are non-returnable). All returns will incur a 25% restock charge. Returns are not accepted after 30 days from invoice date.
RGA stands for Return Goods Authorization. All authorized returns entering the building must include this number on the outside of the package in order for the shipping department to receive and properly process.
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