Soluble wax cores enables precision investment casting foundries to incorporate internal features that cannot otherwise be obtained through hard tooling inserts or ceramic cores. However, as foundries continue to meet challenges to cast ever larger investment castings with more complex internal features, soluble wax technology has not kept up. For example, increased volume of soluble wax required for some patterns leads to longer dissolution times which slows down productivity. End users have also seen increase in surface crazing or cracking in larger cores along with air entrapment. This has resulted in higher reject rates and increased production costs. Working closely with Cera-Met, REMET’s new Solucore® Plus J23 soluble wax was evaluated and successfully implemented into production. This paper presents results of productivity analysis that evaluated the performance of Solucore® Plus J23 in injecting larger soluble wax cores with improved surface finish and faster dissolution rates while maintaining dimensional requirements of existing tooling. Improvements in processing soluble wax cores has also resulted in reducing the foot print in the wax room, lowered production costs and delivered higher quality castings to the customer.