Products designed to fill, seal and bond joints or mating surfaces, preventing the passage of liquids, gases or particulates. While sealants remain partly flexible after curing to accommodate movement, gasket makers cure into a resilient material that forms a custom-fit gasket between flanges or components.
Common Sub-Categories & Examples:
Key Characteristics to Consider:
- 
Curing Mechanism: Moisture-cure (silicone), moisture-insensitive (polyurethane), anaerobic (gasket makers). 
- 
Movement Capability: Percentage joint movement accommodation (e.g. ±25 %). 
- 
Temperature Resistance: From sub-zero (freezer sealants) up to 300 °C+ (high-temp silicones). 
- 
Substrate Compatibility: Metals, plastics, wood, masonry – some require primers. 
- 
Paintability & Finish: Whether the cured sealant can be over-painted to match surrounding surfaces. 
- 
Chemical & Environmental Resistance: Exposure to fuels, solvents, UV, ozone or salt spray.