Custom molded rubber
Custom Molded Rubber Boots
A boot is a molded rubber part that fits over a terminal, a connector, a cable end or a joint and keeps dirt, water or fluid out while it flexes with what it covers. Conquest Seal supplies boots made to your drawing, from the domestic molders it distributes for or through our overseas manufacturing program, with Conquest Seal as the manufacturer of record on that route.
Quotes answered within one business day. A person answers (714) 632-9830, Pacific business hours.
- Part types
- boots, to your drawing
- Sourcing
- domestic molders Conquest Seal distributes for, or made to your print through our overseas manufacturing program and imported
- Manufacturer of record
- the molder (domestic route); Conquest Seal (import route)
- Processes
- compression, transfer and injection molding
- Material
- ASTM D2000 or SAE J200 callout, AMS or MIL document, or a named compound
- Tolerances
- the ARPM class on your drawing, A1 high precision to A4 basic
- Tooling
- built to your drawing, held for your part
- Documentation
- certificate of conformance with every order; material certification and batch test report on request
Specifying a boot
A boot is specified by the shape it fits over, how it is held, by a groove, a clamp or a stretch fit, and whether it has to vent air as it moves. Terminals, connectors and cable ends on electrical equipment are often covered by molded boots. Say what the boot has to seal or insulate against, and name any flammability or electrical requirement your drawing carries.
Boots that move
Where a boot covers a joint or a part that moves, give the stroke or the angle it has to follow and how many cycles it has to last. The wall thickness and the shape set how the boot flexes and how it wears, so the movement belongs on the drawing with the dimensions.
What to specify
The RFQ checklist for custom molded parts explains each item. For a boot, the ones that matter most are these.
- The drawing, and the 3D model as a STEP file if you have one.
- The parts it fits over or clamps to, with their dimensions.
- Any movement: the stroke or the angle, and how many cycles.
- What it keeps out and what it is exposed to: dust, water, oil, sunlight, heat or cold.
- The material by callout, document or compound, with the hardness and the color.
- The ARPM tolerance class for the dimensions that locate the part.
- Your annual usage, whether a mold already exists, and the documents you need with the parts.
Two routes, one set of paperwork
Conquest Seal supplies custom molded parts two ways, set out on the custom molded rubber page. On the domestic route the part is molded by one of the domestic molders Conquest Seal distributes for, and that molder is the manufacturer of record. On the import route the part is made to your print through our overseas manufacturing program and imported, and Conquest Seal is the manufacturer of record and issues the certificate. The quote names the route.
A certificate of conformance ships with every order. Material certification and a batch test report are available on request, and so is AS9102 first-article documentation when your purchase order calls for it.
Tooling
Tooling is built to your drawing and held for your part. Who owns the tool is set by the agreement for the part: it can be yours or Conquest Seal's. The tool can be held stateside when production is domestic; otherwise it is held at the overseas molder in the program. If a mold already exists, say what type it is and who holds it, because whether it can be brought into the program depends on the type of mold.
Materials
Molded parts are quoted in the same compound families as the O-rings, among them nitrile, FKM, EPDM, silicone, fluorosilicone, HNBR, FFKM and polyurethane. The callout on the drawing governs: an ASTM D2000 or SAE J200 line callout, an AMS or MIL document, or a named compound with its data sheet. Each family has its own page with what it suits and its published service range.
Frequently asked
Which rubber is used for molded boots?
The family follows what the boot is exposed to: sunlight and ozone, oils and fuels, heat or cold. Name it by an ASTM D2000 or SAE J200 callout or a named compound, and check each family's page for what it suits.
Can a boot be molded with a clamp groove or a vent?
Yes. Clamp grooves, vent holes and retaining lips are features of the mold, so show them on the drawing and they are quoted with the part.
Who is the manufacturer of record on an imported molded boot?
Conquest Seal. On parts made through the overseas manufacturing program, Conquest Seal is the manufacturer of record and issues the certificate of conformance.
Related pages
Sources
- The ARPM Rubber Handbook, Association for Rubber Products Manufacturers, ARPM MO-1, Eighth Edition, 2020, chapter 1, Molded Rubber Products (tolerance designations only), read 2026-10-10.
- ASTM D2000: Standard Classification System for Rubber Products in Automotive Applications, public scope, read 2026-09-25.
Related guides
Setting Conquest Seal up as a supplier?
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Send the boot drawing
The drawing, the parts it fits, any movement it takes and your annual usage. A Conquest representative replies with the quote and names the route. Quotes answered within one business day. A person answers (714) 632-9830, Pacific business hours.
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