About Teknoseal
Asia's Leading Porosity Sealing Specialist
Teknoseal is Asia's leading provider of turnkey vacuum impregnation and porosity sealing solutions — and one of the top five players worldwide in impregnation technology. With a complete package covering impregnation equipment, sealant supply, and impregnation services, Teknoseal has earned international approvals from global automotive majors and OEMs. Their sealants are trusted across foundry, automotive, aerospace, and hydraulic applications where pressure-tight, leak-free castings are non-negotiable.
Asia's No. 1
Global OEM Approved
Turnkey Solutions
Equipment Supply
Sealant Supply
Impregnation Services
Automotive Approved
The Technology
What is Vacuum Impregnation?
Sealing Porosity — Without Affecting the Casting
Porosity is a natural phenomenon in metal castings — voids and leak paths form within the wall thickness of the casting as metal transitions from liquid to solid state. These internal defects cause castings to fail pressure tests, resulting in leakage of air, gases, or fluids in service. Vacuum impregnation is a proven OEM process that seals these internal leak paths by introducing a sealant into the voids under vacuum and pressure — making the casting completely leak-free without affecting its dimensions, mechanical properties, or surface finish. Castings that would otherwise be scrapped are fully recovered and made fit for use.
The Process
4-Step Impregnation Process
Step 1 — Impregnation
Vacuum & Pressure Fill
The chamber is sealed and vacuum is drawn — removing air from all porosity and leak paths. Sealant is then introduced under positive pressure, filling every void within the casting wall.
Step 2 — Drain
Excess Sealant Recovery
Excess sealant is removed from the casting surface through gravity, rotation, or centrifugal force — recovering unused sealant for reuse.
Step 3 — Wash
Rinse & Clean
Residual sealant is washed from internal passages, taps, pockets, and external features — leaving the casting dimensionally clean and ready for use.
Step 4 — Cure
Sealant Cure
The casting is passed through a cure station where the sealant polymerises within the porosity — forming a permanent, pressure-tight seal that lasts the life of the component.
Key Benefits
Why Vacuum Impregnation
Recover Rejected Castings
Castings failing pressure tests can be fully recovered — dramatically reducing scrap rates and saving casting and machining costs.
No Dimensional Change
The process seals internal voids only — no change to casting dimensions, surface finish, mechanical properties, or machinability.
Improves Surface Treatment
Sealed castings accept surface treatments — plating, painting, anodising — more uniformly, improving finish quality and corrosion resistance.
Permanent Seal
Once cured, the sealant is tough, flexible, heat resistant, and permanent — outlasting the service life of the component.
TSP 99 — The World's Most Trusted Impregnation Sealant
TSP 99 is Teknoseal's flagship sealant — the world-embraced choice for porosity sealing across foundry, automotive, and aerospace applications. Approved by global automotive majors, TSP 99 offers outstanding porosity filling capability, excellent washability, and a very balanced viscosity — making it suitable for fine and medium porosity across all casting types.
Balanced Viscosity
Tough & Flexible
Heat Resistant
Excellent Washability
Outstanding Fill Capability
Global OEM Approved
Applications
Where Teknoseal Is Used
Engine Blocks
Hydraulic Bodies
Pneumatic Components
Fuel Metering Pumps
Gas Valve Bodies
Aerospace Castings
Electrical Connectors
Oil & Gas Components
Aluminium Die Castings
Brazed Assemblies
Welded Assemblies
Sintered Metal Parts
Facing porosity or pressure leakage issues in your castings?
Contact us — we will assess your application and recommend the right Teknoseal solution.
