Fascia boards are the horizontal boards fixed along the lower edge of a roof, typically supporting the gutter system and covering the roof trusses for a clean finish. PVC fascia boards are manufactured from Poly Vinyl Chloride (PVC), a durable thermoplastic material. They are an alternative to traditional wood fascia boards.

PVC fascia boards are exposed for decades to sunlight, heat, rain, and pollution. Like all PVC products, they are prone to degradation unless stabilized. ALCAMIZER™ (hydrotalcites) are added as stabilizers for several reasons.

Heat stabilization during manufacturing. PVC degrades when heated (processing temps 180–200°C). PVC releases HCl gas, which accelerates breakdown. ALCAMIZER™ products trap and neutralize HCl, preventing chain scission during extrusion of fascia boards. This keeps the boards strong, not brittle, right from the factory.

Long-Term Weather Resistance. On roofs, fascia boards get constant UV and thermal exposure. Without stabilizers, PVC would yellow, chalk, and crack. ALCAMIZER™ products act as an acid scavenger and works in synergy with other stabilizers (like calcium-zinc) to preserve color, gloss, and mechanical strength for years.

Eco-Friendly Stabilization. Older stabilizers were lead- or cadmium-based, which are toxic and now banned in most regions (EU, US, etc.). ALCAMIZER™ products are non-toxic and compliant with modern environmental regulations.

Improved Aesthetic Quality. Customers expect fascia boards to stay white, glossy, and uniform even after long exposure. ALCAMIZER™ products reduce yellowing and surface chalking, keeping the boards looking “new” longer.

Synergy with Additives. Fascia boards often contain TiO₂ (for UV protection) and lubricants. ALCAMIZER™ products prevent these additives from degrading or interacting negatively with PVC.