Use Teknoseal TSP 99 to Impregseal Moulded Connectors

With the current trend of increasing use of plastics in automobile for weight reduction and increased electronics in vehicles, impregnation of electrical wire harnesses and plastic moulded connectors have gained much importance.

Wire harnesses are impregsealed against porosity. These wire harnesses are of different lengths, contain wires of different thicknesses, and are made by Tier 1 suppliers such as Delphi, ATPI, Siemens, Group Dekko, Sumitomo and Federal Mogul and many more.

The Reason we do it

As we know almost all molded or cast products consist of porosities, which contains micro voids. Impregsealing your plastics using TSP 99 completely fills these openings to moisture proof. The procedure is also called vacuum impregnating.

When it first emerged in the 1940s, porosity was sealed with sodium silicate and styrene-based resins, and it was mainly used to mend metal castings which were found to have “leakers” in leak-test operations. Shortly after the commencement, the method was used for preventing corrosion in metal castings, powdered-metal parts, and other porous metal elements.

Now the process of prevention of corrosion for other porous metal component such as plastic composites and wood, were being done with potting materials. But by the 1980s, more easily adaptable and flexible resins came to the market for sealing these products.

The process of impregnation is very much needed in connectors. In the connectors, while the socket is made up of plastic, the internal pins are of copper and aluminium etc. In order to avoid the leakage path in the interface between the metal and plastic, impregnation is used, thereby making the components leak proof.

Porosities in harnesses consist of micro porosities within the insulation coating. These porosities could be susceptible to trapping moisture that could lead to sparking and short circuit.

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