---
title: "EPDM Anaerobic Threadlockers and Thread Sealants"
description: "EPDM Anaerobic Threadlockers and Thread Sealants (ethylene-propylene-diene rubber, typically 70 Shore A): excellent in water, steam, brake fluid and"
url: https://engineeringhardware.com/guide/material/epdm-anaerobic-threadlockers/
source: Engineering Hardware & Fasteners
---

# EPDM Anaerobic Threadlockers and Thread Sealants

Seals · Trade series (anaerobic adhesives for threaded assemblies)

Temperature range, chemical and fluid compatibility, hardness and the full dimensional range for this compound.

EPDM Anaerobic Threadlockers and Thread Sealants are supplied to ethylene-propylene-diene rubber, typically 70 Shore A. Corrosion behaviour is excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil, the material is non-magnetic, and the usable service range is approx. -45 °C to +150 °C. In practice this grade is the water, steam and outdoor-weathering elastomer.

- **Grade:** ethylene-propylene-diene rubber, typically 70 Shore A
- **Corrosion resistance:** Excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil
- **Magnetic response:** Non-magnetic
- **Service temperature:** approx. -45 °C to +150 °C

Property values are typical for the grade. Certified mechanical test data is available on request for production orders.

![EPDM Anaerobic Threadlockers and Thread Sealants reference image](https://engineeringhardware.com/wp-content/uploads/2026/09/Anaerobic-Threadlockers.webp)

Material page for anaerobic threadlockers and thread sealants in EPDM (ethylene-propylene-diene rubber, typically 70 Shore A). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil and the service range is approx. -45 °C to +150 °C.

## Why Choose EPDM for Anaerobic Threadlockers and Thread Sealants

The water, steam and outdoor-weathering elastomer. For anaerobic threadlockers and thread sealants, this matters when excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil is the primary requirement.

## Mechanical & Physical Properties

| Grade designation | ethylene-propylene-diene rubber, typically 70 Shore A |
| --- | --- |
| Magnetic response | Non-magnetic |
| Service temperature | approx. -45 °C to +150 °C |
| Corrosion characteristic | Excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil |

## Corrosion Behavior in Service

Carbon and alloy steel anaerobic threadlockers and thread sealants require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.

## Comparable Grades

For anaerobic threadlockers and thread sealants, consider NBR for mineral oil and hydraulic service, which EPDM does not tolerate, or silicone for a wider temperature range in static duty. Elastomer selection is decided by the medium, the temperature range and whether the seal is static or dynamic — not by strength.

## Sizes of Anaerobic Threadlockers and Thread Sealants Available in EPDM

| Grade | Removal | Typical use | Notes |
| --- | --- | --- | --- |
| low strength | hand tools | set screws, adjusting screws, small fasteners | up to about M12 |
| medium strength | hand tools | general assembly, machine screws | the usual default |
| high strength | heat and hand tools | studs, permanent assemblies | not for parts serviced in the field |
| thread sealant grade | hand tools | tapered pipe threads, hydraulic fittings | seals rather than locks |
| retaining compound | heat | bearings, bushes, cylindrical fits | not a thread product |

Dimensions are independent of the material: every size above is available in EPDM.

Custom manufacturing · Made to drawing

## Need this seal in a grade that is not listed?

Epdm is one of the grades the catalog describes. A special seal is almost always a compound change rather than a size change — the same dimensions in a material that survives the medium.

Minimum order from 2,000 pieces; samples within 7 days of drawing approval.

[Custom seal manufacturing](https://engineeringhardware.com/custom/seals/)[Send a drawing](https://engineeringhardware.com/custom/seals/#rfq)

## Technical Drawing

Dimensioned line drawing of low strength Anaerobic Threadlockers and Thread Sealants to Trade series (anaerobic adhesives for threaded assemblies). Side view and top view, drawn to the dimensions in the table below and redrawn for any size selected.

- **Removal:** hand tools
- **Typical use:** set screws, adjusting screws, small fasteners
- **Notes:** up to about M12

## Dimensions & Specifications (Trade series (anaerobic adhesives for threaded assemblies))

| Grade | Removal | Typical use | Notes |
| --- | --- | --- | --- |
| low strength | hand tools | set screws, adjusting screws, small fasteners | up to about M12 |
| medium strength | hand tools | general assembly, machine screws | the usual default |
| high strength | heat and hand tools | studs, permanent assemblies | not for parts serviced in the field |
| thread sealant grade | hand tools | tapered pipe threads, hydraulic fittings | seals rather than locks |
| retaining compound | heat | bearings, bushes, cylindrical fits | not a thread product |

Product catalog

## Related Thread Sealants & Threadlockers products

[![M4-M20 Blackened 45 Steel Hard Inner and Outer Nut Self Tapping Insert Screw Bushing Slotted Type Thread Repair](https://img.engineeringhardware.com/M4-M20-Blackened-45-Steel-Hard-Inner-and-Outer-Nut-Self-Tapping-Insert-Screw-Bushing-Slotted-Type-Thread-Repair.webp)](https://engineeringhardware.com/product/m4-m20-blackened-45-steel-hard-inner-and-outer-nut-self-tapping-insert-screw-bushing/)

Thread Repair & Solid Threaded Inserts

### [M4-M20 Blackened 45 Steel Hard Inner and Outer Nut Self Tapping Insert Screw Bushing Slotted Type Thread Repair](https://engineeringhardware.com/product/m4-m20-blackened-45-steel-hard-inner-and-outer-nut-self-tapping-insert-screw-bushing/)

Inner Outer Thread Adapter · 45# Carbon Steel

**US$0.14 – 0.24**MOQ 100 pieces

[![M5 M6 M8 M10 M12 Carbon Steel Hexagon Metal Nutinsert Self Key Lock Zind Brass Nut Threaded Inserts DIN980m Nut](https://img.engineeringhardware.com/M5-M6-M8-M10-M12-Carbon-Steel-Hexagon-Metal-Nutinsert-Self-Key-Lock-Zind-Brass-Nut-Threaded-Inserts-DIN980m-Nut.webp)](https://engineeringhardware.com/product/m5-m6-m8-m10-m12-carbon-steel-hexagon-metal-nutinsert-self-key-lock-zind-brass-nut/)

Thread Repair & Solid Threaded Inserts

### [M5 M6 M8 M10 M12 Carbon Steel Hexagon Metal Nutinsert Self Key Lock Zind Brass Nut Threaded Inserts DIN980m Nut](https://engineeringhardware.com/product/m5-m6-m8-m10-m12-carbon-steel-hexagon-metal-nutinsert-self-key-lock-zind-brass-nut/)

Hexagon Head · DIN, ANSI, GB, JIS, GOST, BSW

**US$0.012 – 0.0156**MOQ 1,000 pieces

[![Sk302-1 Style Carbon Steel Threaded Insert with Cutting Slot](https://img.engineeringhardware.com/Sk302-1-Style-Carbon-Steel-Threaded-Insert-with-Cutting-Slot.webp)](https://engineeringhardware.com/product/sk302-1-style-carbon-steel-threaded-insert-with-cutting-slot/)

Thread Repair & Solid Threaded Inserts

### [Sk302-1 Style Carbon Steel Threaded Insert with Cutting Slot](https://engineeringhardware.com/product/sk302-1-style-carbon-steel-threaded-insert-with-cutting-slot/)

Common · Carbon/Stainless Steel

**US$0.072 – 12.00**MOQ 1,000 pieces

[![Thread Repair Kits and Threaded Inserts Knl518j Knl524j Knl616j Knl624j Knl714j](https://img.engineeringhardware.com/Thread-Repair-Kits-and-Threaded-Inserts-Knl518j-Knl524j-Knl616j-Knl624j-Knl714j.webp)](https://engineeringhardware.com/product/thread-repair-kits-and-threaded-inserts-knl518j-knl524j-knl616j-knl624j-knl714j/)

Thread Repair & Solid Threaded Inserts

### [Thread Repair Kits and Threaded Inserts Knl518j Knl524j Knl616j Knl624j Knl714j](https://engineeringhardware.com/product/thread-repair-kits-and-threaded-inserts-knl518j-knl524j-knl616j-knl624j-knl714j/)

Round Head · DIN, JIS, GOST, BSW, OEM

**US$0.50 – 0.54**MOQ 1,000 pieces

[![Oilfield Threaded Insert Nut with BS Chrome Insert Nut for Automotive Component Assembly Applications](https://img.engineeringhardware.com/Oilfield-Threaded-Insert-Nut-with-BS-Chrome-Insert-Nut-for-Automotive-Component-Assembly-Applications.webp)](https://engineeringhardware.com/product/oilfield-threaded-insert-nut-with-bs-chrome-insert-nut-for-automotive-component/)

Thread Repair & Solid Threaded Inserts

### [Oilfield Threaded Insert Nut with BS Chrome Insert Nut for Automotive Component Assembly Applications](https://engineeringhardware.com/product/oilfield-threaded-insert-nut-with-bs-chrome-insert-nut-for-automotive-component/)

Insert Nuts Fasteners · DIN, ANSI, GB, JIS, GOST, BSW

**US$0.024 – 3.60**MOQ 10 boxes

[![Stainless Steel Slotted Self Tapping Wire Threaded Insert M2 M4 M8 M12 M20](https://img.engineeringhardware.com/Stainless-Steel-Slotted-Self-Tapping-Wire-Threaded-Insert-M2-M4-M8-M12-M20.webp)](https://engineeringhardware.com/product/stainless-steel-slotted-self-tapping-wire-threaded-insert-m2-m4-m8-m12-m20/)

Thread Repair & Solid Threaded Inserts

### [Stainless Steel Slotted Self Tapping Wire Threaded Insert M2 M4 M8 M12 M20](https://engineeringhardware.com/product/stainless-steel-slotted-self-tapping-wire-threaded-insert-m2-m4-m8-m12-m20/)

Common · Stainless Steel

**US$0.24 – 0.60**MOQ 1 piece

[View all Thread Repair & Solid Threaded Inserts →](https://engineeringhardware.com/fastener-products/threaded-inserts-clinch-fasteners/thread-repair-solid-threaded-inserts/) [Full product catalog](https://engineeringhardware.com/products/)

## Applications & Industries

Anaerobic Threadlockers and Thread Sealants are bought for a small number of well-defined jobs. These are the ones we ship them for. Stocked from low strength to retaining compound (inside diameter).

### Industries that specify Anaerobic Threadlockers and Thread Sealants

- **Field maintenance:** Securing set screws.
- **Machine assembly:** Fasteners that must not loosen.
- **Automotive:** Vibration-prone joints.
- **Hydraulics:** Tapered thread sealing.
- **Process & food equipment:** Sealing at joints that are cleaned and inspected.
- **Hydraulics & pneumatics:** Static and dynamic sealing in cylinders and valve bodies.

### Typical applications

- allowing the stated cure time before loading the joint
- choosing the grade by how the joint will be serviced
- degreasing both threads before applying
- using a sealant grade rather than a locking grade on pipe threads
- excluding dust and moisture from a housing
- sealing a joint against fluid or air pressure

### Service conditions to specify against

- **Sealed joints:** Used where the fixing has to keep water or air out as well as hold — the elastomer, not the fastener, decides service life.
- **Vibration:** Specified where cyclic load would loosen a plain nut or screw — rotating plant, rail, mobile equipment and anything that is not re-torqued in service.

### Where to use something else

- Do not use a high-strength grade on anything that will be serviced in the field; removing it needs heat, and heat is rarely available where the fastener has to come out.

[Full application guide: where Anaerobic Threadlockers and Thread Sealants are used, how to specify them, and the cases they are wrong for](https://engineeringhardware.com/applications/anaerobic-threadlockers/)

Inside the plant

## Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

1. ![Wire rod feeding into a cold heading machine](https://engineeringhardware.com/wp-content/uploads/2026/08/09-wire-rod-feed-cold-heading-machine.webp) 01 **Cold heading** Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail. Head dimensions and under-head radius checked at set-up and per shift.
2. ![Thread rolling machine producing bolt threads](https://engineeringhardware.com/wp-content/uploads/2026/08/03-thread-rolling-machine-bolt-production.webp) 02 **Thread rolling** Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch. Go / no-go ring gauges to ISO 965 tolerance class 6g.
3. ![Baskets of bolts staged for heat treatment](https://engineeringhardware.com/wp-content/uploads/2026/08/05-heat-treatment-baskets-black-bolts.webp) 03 **Heat treatment** Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it. Core hardness and tensile tested per lot to ISO 898-1.
4. ![Zinc plated bolts in a treatment basket](https://engineeringhardware.com/wp-content/uploads/2026/08/23-zinc-plated-bolts-treatment-basket.webp) 04 **Surface treatment** Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list. Coating thickness and neutral salt spray hours to ISO 9227.

## Frequently Asked Questions

### What corrosion resistance do EPDM Anaerobic Threadlockers and Thread Sealants offer?

EPDM Anaerobic Threadlockers and Thread Sealants provide excellent in water, steam, brake fluid and weathering; unsuitable for mineral oil with a service range of approx. -45 °C to +150 °C.

### Which media is EPDM suitable for?

EPDM suits water, steam, glycol brake fluid, ozone and weathering. It is the wrong choice for mineral oil, fuel and grease, which swell it badly. Elastomer selection is decided by the fluid first, then the temperature, then whether the seal is static or dynamic.

### What hardness are EPDM Anaerobic Threadlockers and Thread Sealants supplied in?

Shore A 70 is the general-purpose default. A softer compound (around 60) seals better on a rough or slightly out-of-round surface; a harder one (around 80 to 90) resists extrusion at higher pressure or across a wider gap. State the hardness on the order — it is not implied by the material.

### Does EPDM have a shelf life?

Yes. Elastomers age in storage as well as in service — keep them cool, dark, dry and away from ozone sources such as electric motors, and use stock in the order it arrived. PTFE is the exception and does not age this way.

### How do I request a quotation?

Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.

## Related Pages

[View the full Anaerobic Threadlockers and Thread Sealants page](https://engineeringhardware.com/fastener/anaerobic-threadlockers/)

### More Anaerobic Threadlockers and Thread Sealants Guides