SELEE Corporation is a technical materials company specializing in the design and manufacture of porous ceramics for a wide range of demanding industrial applications.  Scroll down this page to find the best filter for your application.

Cast House Filters

Aluminum Filter

CS-X® is a patented filter formulation offering significant benefits in performance, worker safety, and enviromental impact.

SELEE® Corporation invented the ceramic foam filter in 1973 based on a phosphate-bonded alumina (PBA) structure. It has since been widely copied by other suppliers and has become the standard cast house filter in the industry, representing >98% of ceramic
foam filters in use. In 2008, SELEE® introduced CS-X®. 
This next generation ceramic foam filter for aluminum cast houses offers significant advantages over other PBA filters available


Lithium Aluminum

CS-T™ exclusively developed for Lithium Aluminum alloys

More stable filter-metal interface resulting in better inclusion adhesion

Significant reduction in filter-metal reaction and associated inclusion releases

lithium aluminum 2



SELEE® filters are preferred by aluminum foundries due to their superior dimensional control, resulting in optimal mold fit and reduced risk of metal bypass.

Whether your foundry produces standard aluminum castings or critical, complex, thin-wall aerospace castings, we have the optimal filter for your application.

These filters are pecision cut after firing to the tightest dimensional tolerences including the cut sides have the desirable open-pore structure of true ceramic foam.

The superior dimensional tolerances of SELEE® filters for aluminum filtration are recognizable at first glance.  These filters are precision cut after firing to the tightest dimensional tolerances in the world.  All surfaces, including the cut sides, have the desirable open-pore structure of true ceramic foam.


Zirconia PRZ Filter

To meet the demanding requirements of steel foundries, SELEE Corporation recommends our Zirconia (PRZ) filter.

Our PRZ filters are formulated of a magnesia-stabilized zirconia, the perfect composition for filtering steel grades from carbon to stainless.

There are many benefits to the steel foundry customer including fewer reoxidation and subsurface defects and a higher casting yield.  They are highly thermal shock resistant, a must for the steel foundry.


Steel foundry 1


The high internal surface area of SELEE filters makes for a deep-bed filtration effect throughout the thickness of the filter.  Through deep-bed filtration, even highly fluid slag is retained in the foam network, significantly reducing scrap and machining.  SELEE produces filters in a wide variety of sizes and in several thicknesses and pore sizes to meet the filtration requirements of grey and ductile iron foundries.


MAX Copper Filter

Reduced Break Frequency:  Casting filtered metal has proven to reduce wire and rod breakage by up to 35%.

Reduced Incidence of Nozzle Blockage:  Using filters in launder and/or tundish removes inclusion material, dramatically reduces nozzle blockage and increases production run.

Reduction of Scrap Related to Slag Treatment Operation: Filter pores trap by-products generated during slag treatment, eliminating or greatly reducing scrap and increasing casting yield.

Reduced Scrap Due to Furnace Changeovers:  Casting filtered metals results in increased casting speed and fewer furnace changeovers, which in turn reduce the amount of scrap product related to slag carryover during furnace changeovers.




Investment Casting

The highly specialized Investment Casting industry requires unique filtration and metal handling products.

SELEE has the right ceramic filter composition for your investment foundry.  Whether it’s master melt or casting, our filters can be designed for custom structures.


Start Designing Your Filter Today 1-800-438-7274