Formed-In-Place Foamed Gasket (FIPFG)

Here, too, a compressible seal is applied to a component in the form of a bead. After vulcanization, the foam seal adheres to the substrate. Installation can take place after vulcanization. The seal is again achieved by partial compression.

Materials: Silicone and PU foams

Procedure:

• Restriction to addition-curing RTV-2 and PU foams
• Components A and B are processed in the dynamic mixer and are usually loaded with gas
• The mixture is applied in flowable or solid form to the parts to be sealed using a robot or coordinate table
• The material foams up on the parts (about 2 to 4 times its volume)
• Reaction slightly exothermic at room temperature
• Depending on the system, fully vulcanized in minutes to hours
• Heat dissipation or heat supply (ambient temperature, heating during mixing, temperature and thermal conductivity of the substrate) influence reaction rate and foam structure
• Sealing must be carried out in groove for flowable systems

Advantages:

• seal compressible
• Low closing forces
• Closed-cell foam
• High tolerances with large dimensional fluctuations
• Automatic application

Disadvantages:

• Not suitable for sealing liquid media such as oils, coolants
• High machine expenditure
• Processing conditions must be adjusted specifically to applications

Possible uses:

• headlight housing
• taillight housing
• intake pipe, intake duct
• ignition cable covers
• housings of various types
• packaging industry

Synonyms: Freely applied silicone or PU foam sealant,Freely applied sealant, Wet installation , Freely applied sealant, Dry installation