CALIPER REBUILD - TECHNICAL INFO. - About dust boots - Why RB High-Temp (Blue) Dust Boots

Why RB High-Temp (Blue) Dust Boots

RB High-Temp Dust Boots

Built for track heat cycles that crack OE EPDM boots

RB High-Temp Silicone

Rated to ~450°F

OE EPDM

Rated to ~300°F

150°F higher heat rating than standard OE EPDM boots

Built for track heat

OE EPDM boots tend to crack under repeated high-heat track cycles — RB's silicone boots are built specifically for this.

Real track-proven durability

Documented multi-year use on dedicated track cars, including hard-driven GT3 and EVO platforms.

Right boot for the job

Standard black boots for street use, high-temp blue silicone for track days — choose based on how the car is driven.

Full engineering detail (why boots crack, material choice)

Why OE boots fail on track
OE dust boots are made of EPDM, which performs fine for typical street use, but under the sustained high heat of track driving the material tends to crack, sometimes within a single track day on hard-driven cars.

Why silicone solves it
RB's high-temperature blue silicone boots are rated to roughly 450°F, well above the ~300°F rating of standard EPDM, so they hold up through repeated heat cycles instead of hardening and cracking.

Choosing the right boot
Standard black boots are appropriate for street-driven cars. High-temp blue silicone boots are recommended for cars that see regular track time or sustained hard braking, where OE-style boots are most likely to fail.

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Why RB High-Temp (Blue) Dust Boots

RB High-Temp Dust Boots