Flange sealants

The special flange sealant is used for prevention of corrosive damaging of flange joints, leakage of working fluids, elimination of the axial displacement of flanges. Such products are often used, for instance, in gearboxes and drive mechanisms.

Types of flange sealants

In accordance with the operational principle, these products are divided into the following categories:

• The substances, which harden being exposed to atmospheric moisture. This category includes silicone sealants. They are rather popular because they are easy-to-use. Such products withstand the effects of motor and transmission oils. Usually, they are used for filling wide gaps.
• The sealants, which harden when they come into contact with metal surfaces in the absence of air. This type of compounds are called anaerobic. They are notable for resistance to all technical fluids, used in a car. Such products are perfect for sealing of flanges with small defects.

Composition

The basis of the silicone sealants are high-molecular organosilicon compounds. And dimethacrylate esters are the active ingredient of anaerobic products. Moreover, sealants of both types include synthetic resins.

Tips on flange sealants use

Take into account that the silicone sealants are used for dismountable flanges, while the anaerobic ones – for non-dismountable. Use these products in accordance with manufacturer’s recommendations. Most often, before sealant application, the part surface should be thoroughly cleaned, degreased and dirt removed.

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