The Corteco HT200C is a high-performance, single-component silicone sealant specially developed for the extreme requirements in transmission and differential repair. As a neutral-curing special silicone, it is the first choice for professionals when it comes to permanently sealing housing flanges exposed to constant vibrations and chemically aggressive oils.

Whether for the general overhaul of manual transmissions, sealing drive axles or differential covers – the HT200C forms a high-strength, yet permanently elastic seal that reliably bridges micro-cracks and remains absolutely leak-free even under mechanical stress.

Your advantages at a glance

Special formula for the drivetrain: Maximum resistance to modern synthetic and hypoid transmission oils as well as ATF fluids.
Optimal temperature resistance: Safe to use in temperatures ranging from -50 °C to +200 °C.
Material-friendly (neutral system): Acetic acid-free curing – causes no corrosion on aluminum, magnesium, or steel alloys.
Excellent adhesion: Adheres reliably to cast and light metal surfaces without primer.
Permanently elastic: Confidently compensates for thermal expansion and mechanical vibrations during driving.

Versatile applications

The HT200C is a true all-rounder for workshops, motorsport, and industry:

Transmissions: Housing halves, shift covers, bell housings, and power take-offs.
Differential: Housing covers and flange connections on the final drive.
Engine: Oil pans, timing cover, valve covers, and accessory drive housings.
Cooling system: Thermostat housings and water pump flanges.
Industry: Sealing pump housings, flanges, and gearboxes in mechanical engineering.

Technical data & application

Base: Silicone (neutral curing)
Color: White
Skin formation time: approx. 5–15 minutes
Curing: approx. 2 mm per 24 hours (depending on humidity and temperature)
Application: The sealing surfaces must be clean, dry, and grease-free. Apply sealant to one side, assemble components within the skin formation time, and bolt according to manufacturer's instructions.

Important note: The HT200C is not suitable for sealing fuel lines or permanent contact with gasoline/diesel. Also not to be used as a substitute for cylinder head gaskets.