Filler chooser
Fluid, counterface, load, speed and temperature in. Fillers to look at first, and the ones your fluid rules out, back.
Engineered for extremes
Elastomers for the hottest and the coldest duty.
Custom FKM, HNBR, FEPM and other elastomer compounds, and filled PTFE compounds, for high-pressure, high-temperature (HPHT) and high-pressure, low-temperature (HPLT) service, built to the properties you specify. Every lot comes with its test record, and every requirement can be followed from first request to delivery.
For seal and O-ring makers, rubber moulders and operators. Supplied worldwide.
Lot passportExample
- Hardness
- 75
- Tensile
- 22 MPa
- t90
- 5.0 min
- Verdict
- In limits
111original articles on compounding, sealing and PTFE
86test standards explained in plain words
20original technical guides
4technical briefings with report templates
Two extremes, one standard
Pressure is constant. We design for both ends of the thermometer.
Most seal failures start at an extreme: a rubber that hardens and loses recovery in the cold, or one that ages and sets in the heat. We specify, test and document both, on the same data standard.
HPHT
High pressure, high temperature
to 200 °C+
Hot oil, steam, sour gas and aggressive fluids under pressure. Heat ageing, compression set, fluid swell and rapid gas decompression.
- FKM, FFKM, FEPM, HNBR and EPDM grades
- RGD, SOUR, CHEM, HT and STM duty codes
HPLT
High pressure, low temperature
to −50 °C and below
Subsea, arctic, cryogenic-adjacent and LNG duty, where a seal must still recover and still seal when it is cold and loaded.
- Low-temperature FKM, HNBR, FFKM and fluorosilicone
- LT, ULT and H2 grades, each with TR10 and a sealing test
−60 °C0+250 °C
Polymer series, one data standard
Pick the polymer by the duty. Compare them on one scale.
Every polymer carries the same kind of record: limits, methods, lot results and the raw materials behind them.
Heat, fuels, chemistry and cold: FKM, FFKM and FVMQ
Fluorinated elastomers for heat, fuels, aggressive chemistry and the coldest duties.
Hot oil, fuel, solvent and many chemical duties where nitrile or HNBR run out of temperature or resistance.
See FKM grades →
Dynamic duty under pressure, hot and cold: HNBR, NBR and XNBR
Hydrogenated nitrile and nitrile for dynamic oilfield, pressure-control and hydrogen sealing.
Dynamic and high-pressure oilfield sealing where strength, tear and abrasion resistance matter, and temperatures stay within HNBR limits.
See HNBR grades →
Steam, amines, bases and sour service
TFE/propylene (FEPM) for steam, amines, bases and sour service.
Steam, hot water, amine inhibitors, strong bases and sour service at high temperature, where FKM fails.
See FEPM grades →
Steam, water, phosphate ester and hydrogen
EPDM for the water and steam side of a plant, and for hydrogen equipment.
Steam and condensate, turbine EHC fluids, nuclear service, electrolysers, fuel cells and oil-swell packers.
See EPDM grades →
Pressure control, wear and completions
Natural rubber, chloroprene and polyurethane, each for a narrow, demanding job.
BOP packing units, hydro gate seals, pig cups and wipers, and dissolvable frac plug elements.
See these grades →
Wear, chemistry and low friction, from −200 °C to 260 °C
Filled PTFE: glass, carbon, graphite, bronze and MoS2.
Wear rings, back-up rings, seats, bearings and gaskets, where rubber cannot take the chemistry or the temperature. Choose the filler for the fluid, the counterface and the load.
See PTFE compounds →How a requirement moves
From a list of properties to a lot you can trace.
Requirement
You state the properties, fluids, temperatures and approvals. The builder turns them into limits and methods.
Candidates
We propose compounds from existing grades or a new formulation, with the reasoning shown.
Lab samples
Small mixes are made and tested against your limits and, where agreed, in your fluid.
Test data
You receive results, not adjectives: values, methods, conditions and what they mean for your duty.
Batch supply
The agreed compound is mixed, tested lot by lot and shipped with its Passport.
Decode
Reverse engineering, with the limits stated.
Send a part you own or may analyse. We estimate what it is made of, profile how it behaves, and, if you wish, develop a compound that meets the same targets. You get a profile to match, not a copied recipe.
What you get
Polymer family and filler type. Rough composition. A property profile. Proposed match targets. A plain statement of what the analysis cannot tell you.
What we ask first
Is the part yours, or are you entitled to analyse it? What do you need the result for? Which approvals apply?
Knowledge base
The testing and standards material a specifier needs, in one place.
We publish plain-language guides, a standards index, calculators, and briefings on rapid gas decompression, sour ageing, oilfield qualification and drinking-water approvals. Free to read.
Oil and gas
Rapid gas decompression (explosive decompression): why seals blister and how it is tested
Gas dissolves into a seal under pressure. If the pressure drops fast, the gas can tear the seal apart from inside. This page explains the mechanism and the test route.
Read the guide → SelectionChoosing between FKM, HNBR and FEPM for oilfield and industrial sealing
A decision guide built around the service: temperature, fluid, pressure change, dynamic or static, and approvals.
Read the guide → Working with usHow to specify a compound: the requirement checklist
The information that lets a compounder propose the right candidate on the first round, and what happens to your requirement after you submit it.
Read the guide →PTFE compounds
Filled PTFE, chosen by the property that decides the duty.
Glass, carbon, graphite, bronze and MoS2 fillers change wear, creep, friction and chemistry. Use the chooser, open a datasheet, then send us the duty.
PTFE grades and datasheets
Published limits for typical properties, wear, friction and PV. Download the sheet or start a requirement from a grade.
Which filler? The decision table
Virgin, glass, carbon, graphite, bronze and MoS2 compared on wear, creep, chemistry and counterface.
PTFE guides
24 original articles on properties, processing, wear, seals, gaskets, chemistry and PFAS. They live in Learn.
Decide faster
Five tools that take you from a question to a quotation.
Use them before you talk to anyone. They are free, and they need no login.
Specification reader
Upload your specification as a PDF. It stays in your browser. We read out the properties, fluids, temperatures and standards, and check them against our grades.
Compound selector
Choose the fluids and the temperature window. See which polymer families and published grades fit.
Datasheets
Download FKM, HNBR, FEPM and PTFE datasheets, or enter your own property needs and see which grades meet them.
Order and lot tracker
Follow your order from confirmation to delivery, and open the record of every lot we ship.
RFQ checklist
Fourteen lines to answer so every supplier quotes the same question. Print it or save it as a PDF.
What you get with every lot
Evidence you can audit, not adjectives.
Results against limits
Hardness, tensile, elongation, compression set, density and cure data, each with its method and a plain verdict.
Raw-material traceability
The lots of polymer, filler and curative behind each batch, so a problem can be traced both ways.
Consistency over time
A chart of recent lots shows drift before it becomes a failure.
Specified, then tracked
Your requirement moves through five visible stages, and your order through seven.
Grades shown on this site are samples that show how limits and lot records are laid out. No Pascalor compound holds a third-party approval unless its datasheet states the certificate.
For buyers and specifiers
Read this before you write the request.
Tell us what the seal has to survive.
Fluids, temperatures, pressures, approvals. Fill in what you know and leave the rest blank. We reply by email.