Gasket Treatments and Coatings

Nov. 15, 2002
For many applications, gaskets are treated with various other metals to achieve better surface properties, encourage or discourage adhesion, or resist chemical or microbial attack.

For many applications, gaskets are treated with various other metals to achieve better surface properties, encourage or discourage adhesion, or resist chemical or microbial attack.

Adhesives are used where an immediate permanent bond is needed. They are usually a synthetic rubber, resin, or combination.

Fungicides resist mold growth and may be an integral part of the gasket material or applied as surface treatment. Common fungicides are betanaphthol, pentachlorophenhol, salicylanilide and various compounds of copper and mercury.

Graphite is applied as a dry flake, mixed with oil, or in a water emulsion to level surfaces and to inhibit adhesion.

Oil and hot paraffin dip coats prevent loss of moisture during storage.

Reflectors such as aluminum paint or lacquer offer some protection to gaskets located near heat sources.

Rubber coatings such as neoprene are applied as a dip coat to reduce oil penetrations, loss of moisture, and installation breakage. Polysulfide coatings help level the surfaces and promote sealing contact of relatively hard-fiber sheet materials.

Talc and mica dust are applied dry or in an adhesive vehicle to cut surface friction of gaskets. They are often used where mating parts must be rotated to close the joint.

Sponsored Recommendations

From concept to consumption: Optimizing success in food and beverage

April 9, 2024
Identifying opportunities and solutions for plant floor optimization has never been easier. Download our visual guide to quickly and efficiently pinpoint areas for operational...

A closer look at modern design considerations for food and beverage

April 9, 2024
With new and changing safety and hygiene regulations at top of mind, its easy to understand how other crucial aspects of machine design can get pushed aside. Our whitepaper explores...

Cybersecurity and the Medical Manufacturing Industry

April 9, 2024
Learn about medical manufacturing cybersecurity risks, costs, and threats as well as effective cybersecurity strategies and essential solutions.

Condition Monitoring for Energy and Utilities Assets

April 9, 2024
Condition monitoring is an essential element of asset management in the energy and utilities industry. The American oil and gas, water and wastewater, and electrical grid sectors...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!