S-2000 offers the same clarity as NT-CLR but contains fewer additives and is therefore thinner than NT-CLR. This glaze has a higher coefficient of expansion (higher thermal expansion) and is more tolerant of high expansion bodies. S-2000 contains a blue dye to help you see where the glaze was applied.
The fundamental performance difference between our two clear glazes is in their rates of expansion: NT-CLR has a lower rate of expansion, S-2000 a higher rate. As you gain experience with specific clays or bisque bodies and monitor firing results you’ll understand which clear glaze is right for you.