Akcrostab LT-4798 Akzo Nobel-Akcros Chemicals North America South and Central America Heat stabilizer Light stabilizer / UV-absorber Vinyl Coil Coating mixed metal soap heat and light stabilizer designed for use in a variety of clear PVC articles.compatible with a wide range of compounding ingredients, formulated to give excellent clarity, heat and dynamic stability in clear vinyl, applicable to lightly filled compounds, recommended for use in extruded, calendered and plastisol applications, Suggested usage level is 2 to 3 phr. Akcrostab LT-4798 is a mixed metal soap heat and light stabilizer designed for use in a variety of clear PVC articles.Formulated to give excellent clarity, heat and dynamic stability in clear vinyl.