Custom Gaskets, Waterjet-Cut to Your Drawing

What to send for a custom gasket quote

A quote needs six things. The drawing is the tool, so a DXF gets the cleanest cut; a PDF or a dimensioned sketch works. If no file exists, send a photo of the part beside a ruler, or the sample, and a Conquest representative tells you what is needed to quote it.

1. Drawing. A DXF or DWG of the outline, or a PDF with the outside and inside dimensions, bolt pattern and hole sizes. A photo of the part beside a ruler is the fallback.
2. Material or specification callout. The sheet by name (EPDM, cork-nitrile, PTFE, silicone sponge) or by callout: an ASTM D2000 line callout for rubber, an ASTM F104 callout for fiber and PTFE sheet, an ASTM D1056 grade for sponge, or the military or AMS document the print names.
3. Thickness. The sheet thickness in inches or millimeters, as the drawing calls it out; each material page lists the thicknesses its cited sheets come in.
4. Quantity. The quantity now, and the expected annual usage or release schedule if there is one.
5. Application. The medium, the temperature and the pressure. When the print names only a material, name the grade or specification you want quoted.
6. Adhesive backing. Yes or no, and which face. Adhesive-backed sheet is cut with the liner on.

Size limits, tolerances and edge

Our waterjet cuts with pure water and no abrasive, and the stream is about 0.005 in. It takes parts up to about 10 ft by 6 ft, where the sheet comes that large. The minimums are a part outside diameter of 0.500 in, an inside diameter of 0.250 in and a wall (cross section) of 0.125 in, and bolt holes or other holes apart from the inside diameter are reviewed on the quote when they are under 0.150 in. Small parts in thick sheet are reviewed on the quote, because the jet leaves a poorer edge on them. Felt, mica and tanged (metal-inserted) flexible graphite are not cut on our waterjet; those parts are cut by the sheet maker or a cutting partner, and the quote says which.

Tolerance is set to your drawing and confirmed on the quote. Cut outlines in solid rubber are generally held to the RMA (ARPM) A2 Precision class, depending on the material, the durometer and the thickness; A2 is a class written for molded rubber products [S4], and it is the class we hold cut rubber to. A rubber print tighter than A2 is quoted with a deviation, which needs a drawing revision or your written acceptance. Thickness tolerance belongs to the sheet as supplied.

Every order ships with a certificate of conformance naming the part number, the specification, the manufacturer, the lot, the quantity and the manufacturer's cure date.

Sources

1. [S1] ASTM F104-11(2020), Standard Classification System for Nonmetallic Gasket Materials, https://store.astm.org/f0104-11r20.html, accessed 2026-09-28.
2. [S2] ASTM D1056-20, Standard Specification for Flexible Cellular Materials: Sponge or Expanded Rubber, https://store.astm.org/d1056-20.html, accessed 2026-09-25.
3. [S3] Parker O-Ring & Engineered Seals Division, compound E3609-70 (ethylene propylene, 70 durometer, drinking water and medical) product sheet, accessed 2026-08-13.
4. [S4] RMA (ARPM) molded rubber tolerance designation A2 Precision: Association for Rubber Products Manufacturers, The ARPM Rubber Handbook (ARPM MO-1, Eighth Edition, 2020), chapter 1, Molded Rubber Products, page 8, read 2026-10-10.

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