SYNTEVEN 451 is a highly reactive polyester styrene resin used as a binder for mastics. It cold-hardens at low temperatures, forming a transparent and durable polymer. It is recommended to use fillers like talc, dolomite/calcite, crystalline gypsum, and iron-free barite for improved sandability, adhesion, and compactness.

SYNTEVEN 463 is a medium-reactivity unsaturated polyester resin dissolved in styrene, offering strong flexibilizing properties. It enhances elasticity and adhesion on various substrates like galvanized steel and plastic, and it's suitable for non-"direct polished" polyester systems. Widely used in primers for U.V. photo-curing systems, automotive putties, and direct gloss resin-based paints, it maintains excellent adhesion and sandability without compromising gloss or scratch resistance, making it ideal for demanding industrial sectors. Preliminary compatibility tests are recommended before use.