Material: Polyurethane

Polyurethanes are particularly versatile plastics that can be foamed or cast in a wide variety of moulds. Polyurethanes are encountered in all areas of daily life, (mattresses, sponges, clothing, paints, adhesives, etc.). Polyurethane products can be manufactured in various gradations, from soft and elastic, to hard, as well as with different densities. In addition to these day-to-day applications, ZAPP-ZIMMERMANN uses polyurethanes in the area of fire protection. For many years ZAPP-ZIMMERMANN has been manufacturing most of the standard products, as well as a number of special components, of PU foams. 

Properties: A wide variety of geometries and shapes can be cast or foamed.

• Casting compounds: rubber-like to hard, medium density to high density, 500 – 1300 g/dm³
• Foams: soft to hard, low to medium density, 200 – 400 g/dm³

Examples: In addition to the standard products for cable and pipe penetration seals, ZAPP-ZIMMERMANN produces a wide range of polyurethane moulded parts with fire protection properties: Air transfer grilles, sealing rings, sealing strips, mats, and many other items.

Material: acrylic

Acrylics are elastic plastics, which in the construction area are primarily used for the sealing of joints and stress cracking. In addition, acrylic is used for paints and lacquers, as well as adhesives. 

Properties: Unlike silicone, acrylic is odourless. In addition, after hardening, acrylic can be coated over and can be built up in multiple layers. 

Examples: ZZ® 333 Fire Protection Mastic is an acrylic-based joint sealing compound that is used for sealing of joints and small openings in ZZ through penetration firestop systems, or also individually for small through penetration seals.

Material: silicone, silicone foam

Silicone is an elastomer with versatile implementation possibilities; in the construction industry it is primarily used as a sealant, casting compound or coating material. 

Properties: As an elastomer, silicone is extremely ductile and is capable of strong elastic deformation. Consequently, it is primarily used in areas where it accommodates elongation or deformation and then must return to its original shape. In addition, it is highly resistant to weathering; thus it is often used in outdoor areas or wet-duty areas, e.g. for joints in bathrooms. 

Examples: ZZ® 345 Fire Protection Silicone offers these advantages of an elastic joint sealant, and in the event of fire simultaneously forms an extremely stable, hard carbon layer for fire resistance up to EI 180. ZZ® Fire Protection Silicone, satisfies the requirements specified in the EN ISO 11600 standard for building construction joints, and in other standards.

Material: Butyl rubber

Butyl rubber is a polymer with plastic properties. Among other applications it is used in tapes, sealing compounds and adhesives. 

Properties: Butyl rubber is plastic, kneadable and mouldable, and in this regard self-adhesive, so that it can be very effectively shaped. Moreover, excellent resistance to ageing and weathering and compatibility with most building materials are additional advantages of this material. 

Examples: ZAPP-ZIMMERMANN primarily uses butyl rubber for ZZ® 451-150 Fire Protection Wrap.