Origin: Herten, Germany
Diffu-Therm is the non-destructive testing brand of Helmut Klumpf Technische Chemie KG (Herten, Germany) — the manufacturer behind the oldest German red/white penetrant testing system. The range covers dye penetrants, developers and cleaners for PT, magnetic powders and suspensions for MT, UV fluorescent systems, and the System C range that works on surfaces up to 200 °C.
Fast Group distributes genuine Diffu-Therm products in Vietnam. We work directly with the supply source to guarantee authenticity and batch traceability, and every shipment comes with the SDS/manuals and CO/CQ paperwork the project needs. With NDT consumables this is not a detail: a missing English SDS or a CO/CQ that does not match the batch number is enough to hold up an inspection sign-off.
Browse the full Diffu-Therm catalogue portal (in Vietnamese)
Diffu-Therm did not start out as an ordinary chemicals brand. The penetrant method that carries the name was developed at the Junkers aircraft and engine works in Dessau and patented in Germany in 1943 (DRP 895.839), with Helmut Klumpf credited as the inventor. An improved version was patented again in 1958 (DBP 1.207.663). The company has manufactured independently in Herten since 1950, and Diffu-Therm is known today as the oldest German red/white penetrant testing system.
That history matters in practice for QA/QC teams. This is a manufacturer that has done one thing for more than seven decades, and the range is built as a matched system — penetrant, developer and cleaner from the same family are tested to work together. It is the reason serious NDT procedures discourage mixing consumables from two different suppliers within a single inspection.
Founded in 2019, Fast Group is an authorised industrial equipment distributor in Vietnam. What sets us apart is not the size of the catalogue — it is the direct working relationship with our supply sources, which gives us control over authenticity, pricing, lead time and the documentation attached to every batch.
With NDT consumables, documentation is usually where projects come unstuck. A shipment can arrive on schedule and still fail acceptance because the English SDS is missing or the CO/CQ does not match the batch number. That is why our process starts by confirming the correct part number and the complete document set before we quote, rather than sorting it out after the goods have landed.
With headquarters in Ho Chi Minh City, a branch office in Vung Tau — the centre of Vietnam's oil & gas industry — and a presence in Singapore, we are positioned to connect international supply with the schedule your plant or project actually runs on.
Fast Group runs a dedicated catalogue portal for Diffu-Therm. Every part number has its own page with pack sizes, working temperature range, related standards and downloadable SDS/manuals. The portal is currently published in Vietnamese.
Send us the part numbers, pack sizes, quantities, inspection method (PT/MT/UV) and the documentation your project requires — we will confirm availability, lead time and price.
