Custom Precision Seals
When off-the-shelf seals won't do the job, we machine them to your exact specifications — any profile, any material, any size up to 24 inches in diameter.
No Mold Costs. No Minimum Orders. No Waiting Weeks.
Standard seal kits fail when equipment is old, obsolete, non-standard, or operating in extreme conditions. Mercury Hydraulics offers custom-machined seals produced to your exact dimensional and material requirements — with no tooling fees, no mold costs, and same-day service available for urgent orders.
Whether you need a single replacement seal for a 40-year-old cylinder or a production run of specialty seals for a defense application, we deliver precision-machined sealing solutions that meet your exact specifications.
Seal Types We Produce
From standard O-rings to complex multi-piece assemblies, we machine every seal profile used in hydraulic and pneumatic systems.
Rod Seals & Assemblies
Prevent fluid leakage along the piston rod. Available in single-acting and double-acting configurations for high-pressure hydraulic cylinders.
Piston Seals & Assemblies
Seal the piston within the cylinder bore to maintain pressure differential. Engineered for both static and dynamic applications.
Wiper / Scraper Rings
Protect the cylinder internals by removing contaminants from the rod as it retracts. Critical for marine and outdoor equipment.
U-Seals
Lip seals for rod and piston applications. Available in polyurethane and Buna-N for a wide range of pressures and temperatures.
Buffer Seals
Absorb pressure spikes and protect primary rod seals from peak loads. Essential for high-cycle and shock-loaded applications.
O-Rings & Back-Up Rings
Static and dynamic sealing for ports, end caps, and fittings. Available in all standard and non-standard sizes, inch and metric.
Rotary & Swivel Seals
Designed for rotating shaft applications including hydraulic motors, rotary actuators, and swivel joints.
Wear Rings & Guide Bands
Prevent metal-to-metal contact between piston and bore. Available in PTFE, fabric-reinforced phenolic, and composite materials.
Vee Packing
Adjustable multi-ring seal sets for high-pressure, high-temperature applications. Ideal for older cylinder designs and custom presses.
Head Seals & Flange Seals
Static seals for cylinder end caps and head glands. Custom machined to exact bore and groove dimensions.
Cushion Seals
End-of-stroke cushioning for cylinders operating at high speed. Reduces impact loads and extends cylinder service life.
Duo Cone Seals
Heavy-duty metal face seals for extreme environments including underwater, mining, and military equipment.
Material Selection
The right material makes the difference between a seal that lasts years and one that fails in weeks. We match material to your specific fluid, temperature, pressure, and environment.
Polyurethane (PU)
High-pressure hydraulics, abrasion resistance, RV jacks, cylinders
Buna-N / Nitrile (NBR)
General hydraulic & pneumatic, petroleum-based fluids, standard cylinders
Viton® (FKM)
High-temperature, aerospace, chemical resistance, fire-resistant fluids
PTFE / Teflon
Low friction, chemical inertness, food-grade, extreme temperature ranges
EPDM
Water-based fluids, steam, outdoor weathering, brake systems
Neoprene (CR)
Weather, ozone, and refrigerant resistance, marine applications
Not Sure Which Material?
Our engineers will review your application — fluid type, operating pressure, temperature range, cycle rate, and environment — and recommend the optimal material. Call us at (321) 312-0689 or send us your cylinder specs and we'll get back to you same day.
Industries We Serve
Custom seals for every sector — from aerospace-grade Viton seals to heavy-duty polyurethane for construction equipment.
Aerospace & Defense
Marine & Offshore
RV & Recreational
Construction Equipment
Agricultural Machinery
Mining & Heavy Industry
Dump & Refuse Trucks
Aerial Lifts & Cranes
How to Order Custom Seals
Provide Your Dimensions
Send us the seal's inner diameter (ID), outer diameter (OD), height/cross-section, and profile type. Inch or metric — we work in both.
Specify Material & Application
Tell us your fluid type, operating pressure, temperature range, and environment. We'll confirm the right material or suggest alternatives.
Receive Quote & Confirm
We'll provide a quote with lead time. Same-day machining is available for urgent orders placed before 5:00 PM EST.
Precision Machined & Shipped
Your seals are CNC-machined to exact tolerances, inspected, and shipped. Drawings and tech specs included with every order.
Need a Custom Seal?
Don't let a missing or failed seal keep your equipment down. Call us now or send your specs and we'll get you a quote same day.
Can't Find the Seal You Need?
If it seals hydraulic or pneumatic pressure, we can machine it. Send us your dimensions and we'll have it ready.