PRODUCT INNOVATIONS


Green Sealant Protects Against Leaks at High Temperatures A recyclable sealant, Rexeal 100


by Ultraseal International/America Inc., Ann Arbor, Mich., has been developed for impregnating cast components operating in tempera- tures between -58F and 428 F (-50C and 220C). The sealant counteracts porosity and is particularly effec- tive for parts that have to undergo thermal cycling, such as engine and transmission castings. Rexeal 100 can be used on raw


castings at a metalcasting facilty or on machined and ready-to-assemble components at the end-user’s manufac- turing plant to prevent pressure leaks. Traditional sealant processes


A cross-sectioned component under UV light shows the location of the impregnating sealant.


wash away 95% of the sealant each cycle. Instead of being flushed away after the impregnation process, Rexeal 100 can be separated from the wash water in one of Ultraseal’s Sealant Recycling Systems, which will return the excess sealant and


June 2011 MODERN CASTING | 45


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