ATE TD003 brake-cylinder paste: respect the application position and fluid system

ATE TD003 brake-cylinder paste: respect the application position and fluid system

With brake-cylinder paste already on the bench, it is tempting to use it during caliper work because it is a brake lubricant. First establish where the product is permitted and which fluid system it supports. This helps avoid buying the wrong consumable or applying it in the wrong location.

Internal use does not mean use everywhere around the brakes

ATE TD003 describes this brake-cylinder paste as providing corrosion protection for metal components in hydraulic brake units and assisting assembly of rubber components onto metal surfaces. It is not resistant to splash water and is therefore limited to internal surfaces in protected or enclosed installation positions. [TD003, English page 3 and Chinese page 35][S18]

This restriction deserves more attention than the general word “lubrication”. A brake-service product's internal assembly application cannot simply be extended to external guide pins or other exposed areas. Identify the precise work location before selecting the consumable.

Check the fluid system, not just DOT numbers

The document addresses brake-fluid systems based on polyglycol ethers, listing DOT 3, DOT 4 and DOT 5.1. It excludes brake units using silicone-based or mineral-oil-based hydraulic fluids. [Fluid-system restrictions][S18]

Similar numbers do not justify substituting fluid systems. Nor does one DOT grade establish that the paste is permitted on every material or location. Check fluid base, contact materials and installation position together.

Brake-fluid resistance does not establish universal compatibility

TD003 qualifies its statement about plastics: plastics resistant to brake fluid generally also resist this paste, but compatibility testing is still required if in doubt. The same applies to organic coatings. [Material compatibility][S18]

An unidentified replacement piston or coated component cannot be assessed by appearance alone. If a supplier says only “it works on all brakes”, ask which material and product document supports that statement.

More paste does not resolve a fault

The document requires a thin, even film and explicitly prohibits contact with friction linings or brake-disc surfaces. [Application and contact restrictions][S18] Assembly assistance is separate from fault repair. The data sheet gives no replacement criteria for leakage, wear or sticking; it does not establish that extra paste can replace fault inspection or component replacement.

Document scope and verification

This article uses the ATE brake-cylinder paste TD003 technical data sheet, marked version 09/21. It is general technical information for this supplier's specified product, not a recall or factory repair authorisation for any vehicle. There is no associated recall market, model year or VIN scope.

No public data were available in the cited material for fitment to particular Chinese-brand vehicles, component OE numbers, material combinations or permission to dismantle and repair. [To be verified] It does not establish use on all BYD, MG or other models. Check compatibility using the VIN and local factory parts catalogue, and confirm the application position against the vehicle's factory repair requirements and product instructions. This article is not a hydraulic-brake dismantling tutorial.

For brake-service consumables, use the parts enquiry page.

[S18]: https://www.ate-brakes.com/media/5594/919998-90031-td-003-bremszylpaste.pdf