Product Short Description: Rxsol ORG -15 (Asphasol) shale inhibitor is a partially water soluble, water dispersible blend, containing sulfonated organic resins for water-base muds. Product Description: RXSOL ORG -15 (Asphasol) shale inhibitor is a partially water soluble, water dispersible blend, containing sulfonated organic resins for water-base muds. It aids in stabilizing shale sections, controlling solids dispersion and improving wall cake characteristics.