ZZ^® 535 Fire Protection Joint Seal

Fire protection joint seal for tunnel construction made of of elastic polyurethane foam with special fire protection additives and flexible silicone outer skin. This makes it particularly suitable for use in component joints that are exposed to higher levels of moisture or climatic stress. With a fire resistance classification of up to EI240, it reliably contributes to maintaining fire resistance in moving joints.

Processing is straightforward and efficient: the joint seal is simply inserted into the joint with the specified excess and adapts easily thanks to its elastic structure. It can compensate for movements of up to 25% and can be cut to size individually. The ends are sealed with silicone. This makes it a true “one-product solution” that requires no additional materials or work steps and enables economical, time-saving installation.

Fire protection in tunnels – tested according to RijksWaterStaat curve (RWS)

• Up to EI120 between concrete test specimens with 30 mm fibre cement boards
• Up to EI240 in combination with fibre cement boards

Particularly suitable for:

• use in harsh weather conditions (frost, UV, splash water and salt spray)
• Tested in durability assessment for type X applications (with additional loads)
• Tunnel atmosphere with weathering
• Joint widths Ø 20 - 80 mm

Advantages:

• Intumescent foam with silicone cover protects internal joint seals from fire and tunnel atmosphere
• Resistant to moisture, exhaust gases, UV radiation, high temperature fluctuations and mechanical loads
• Quick installation without adhesives or fasteners