Waterproofing and reliability
Reduce waste, secure your assemblies and guarantee the tightness of your equipment subjected to pressure.
European leader
Waterproofing by impregnation
Subcontracted work, Complete installations and dedicated products to guarantee the waterproofing of your parts.
A complete offer around impregnation
Maldaner supports foundries, equipment manufacturers and manufacturers throughout the value chain: from the raw part to the finished part, 100% waterproof.
What we do
We treat the porosities of your parts to secure your waterproofing, safety and performance functions.
- Impregnation subcontracting for your series and prototypes
- Design, sale and rental of impregnation installations
- Supply of impregnation products and resins
- Process support and industrial development
Costs & deadlines
Respect your quality commitments while controlling your production costs and your time to market.
A controlled process
A proven industrial process, included in the range, reproducible and perfectly traced.
Why impregnation?
10-6
helium bars
Maximum sealing
800
bars
Pressure resistance
In many cases, the impregnation is included in the range from the design of the parts.
The majority of foundry parts are neither gas nor liquid tight. The origin of these defects lies in the method of casting metals.
It is at this stage that cracks, sinkholes, porosities, etc. form. These manufacturing anomalies are rarely detectable to the naked eye. Impregnation is the only process that can definitively resolve waterproofing problems of these parts.
Increasingly complex parts, high quality requirements and cost constraints have imposed impregnation as an essential response to foundry problems.
Upgrading leaky parts without scrapping them
Securing hydraulic, pneumatic or cooling functions
Long-term leak control, including in severe conditions
A sequence of controlled industrial steps to guarantee a reproducible, traceable result that meets your requirements.
Preparation & cleaning
Cleaning adapted to the material and type of porosity, degreasing and preparation of surfaces to promote penetration of the product.
Vacuum impregnation
Vacuuming the parts then pressurizing the impregnation product to fill the porosity networks, including the finest.
Spinning & polymerization
Elimination of excess product, rinsing and controlled polymerization to permanently fix the impregnant in the part.
Control & traceability
Tightness control, quality records and marking of parts for perfect traceability of your productions.
Why work with Maldaner?
Industrial experience
Several decades of experience serving foundries, equipment manufacturers and industrialists, with processes validated by major clients.
Site responsiveness
Three sites in France to limit transport, reduce delays and offer you processing times adapted to your rates.
Technical support
Support for the definition of specifications, development of impregnation ranges and quality monitoring throughout the series life.
Our sectors at a glance
A horizontal reading to quickly browse the areas where impregnation provides reliability and waterproofing.
Automotive & mobility
Engine housing, hydraulic blocks, power steering parts, gearboxes, electric vehicle components.
Energy & HVAC
Heat exchangers, pumps, compressors, valves, boiler parts and air conditioning systems.
Aeronautics & defense
Hydraulic and pneumatic components subjected to high pressures and extreme reliability requirements.
Other industries
Railway, medical, special machines… Any application requiring long-lasting sealing of metal parts.
Porosity categories
The external appearance of the porosity does not make it possible to determine the nature and importance of the defect. Impregnation is recommended after machining but before surface treatment to avoid penetration of stripping products.
Internal porosities
Without direct consequence but which can become unblocking during machining operations.
Surface porosities
May cause appearance defects: bleeding, oxidation, degassing, etc.
An essential technical solution
Trust Maldaner expertise for the sealing of your foundry parts.