Form-in-Place Gasket Application

Form-in-Place gaskets are a process in which an un-cured elastomer is applied to a sealing face and then allowed to cure. A conductive EMI Shielding gasket or Environmental Seal is applied directly onto enclosures, mouldings and covers. Our Form-in-Place gaskets are dispensed using highly accurate CNC machinery.

UVOX MP Series of compounds has been specially developed for form-in-place gaskets. They consist of a silicone elastomer and, often, a filler. The filler comprises µm-scale conductive particles.

The silicone elastomer is unaffected by most temperature changes and has an operating temperature range of -40°C to +200°C.

The MP Series of compounds are RTV. They provide a safe method of curing when applied to sensitive materials or enclosures. This is especially true for PCBs which can often be damaged by high temperatures or humidity.

Form-in-Place Bead

Customer Benefits

  • Suits complex gasket layout
  • Offers lower compression forces than other solutions
  • Easier to handle and assemble
  • Effectively utilised EMC gasket
  • Lower lifetime service and maintenance costs
  • Large cost saving versus moulded alternatives

Features

  • Easy to customise
  • Very fast turn around compared with moulded gaskets
  • A firm fixed gasket to components
  • Material costs are low due to minimal waste

Technical Data

Description Unit MP-A3X MP-L6X MP-L6K MP-A3X-SF MP-L6X-SF MP-BY1 MP-AY1
Datasheet   Download Download Download Download Download Download Download
Elastomer   Silicone Silicone Silicone Silicone-Free Silicone-Free Silicone Silicone
Conductive Filler   Ag Ag/Al Ag/Al Ag Ag/Al Non Non
Corrosion Prevention   Poor Poor Good Poor Poor Very good Very good
Number of Components   1 1 1 1 1 1 1
Volume Resistivity mΩcm < 2 < 8 < 9 < 2 < 8 7 x 1017 7 x 10 17
Shielding Effectiveness
200MHz to 10GHz
dB 80-110 80-110 80-110 80-110 80-110 None None
Hardness Shore A 45 55 50 58 58 25 20
Density (cured) N/cm3 2.2 2 2.3 2.5 2 1 1
Compression Set % < 15 % 6% 14% 22% 22% 25% 1%
Adhesion Strength N/cm2 > 10 > 10 > 10 > 10 > 10 > 10 > 10
Deformation Strength N/cm 2 6 4.5 4 4 1.2 1.2
Temperature Range °C -40 to + 200 -40 to + 160 -40 to +125 -30 to +100 -30 to +100 -40 to +150 -40 to +150
Full Cure Hr. 24 24 24 24 24 24 24

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