Emshield DFR / WFR CE
Sika Emshield is an EN-1366-4 tested, fire-rated movement joint, Emshield DFR / WFR CE is a silicone-faced movement joint for European and other markets requiring CE marking. Tested by CSTB France and certified by European Technical Assessment (ETA), Emshield DFR / WFR CE provides up to 4-hours of fire resistance, and is a water, air, and smoke seal with 100% movement capability.
Other features include thermal insulation, UV stability, and trafficability. In contrast to fire barrier blankets Emshield DFR / WFR CE is installed entirely from above the floor slab and performs without the need for invasive metal anchors or complex field fabricated assemblies. Emshield DFR / WFR CE provides a cost effective, long-term watertight seal.
Emshield DFR / WFR CE combines a factory-applied, low modulus silicone with an open cell polyurethane foam infused with a water-based, fire-retardant, acrylic dispersion. The traffic-grade silicone facing is factory adhered to the infused foam on two sides at a width greater than the maximum anticipated joint extension, and is then cured. When compressed, the silicone facing forms a bellows profile capable of accommodating +/-50% (total 100%) movement from the product’s nominal size.
Emshield WFR CE is designed to be used in movement joints in exterior and interior walls where a combination of watertightness, fire-rating, sound attenuation, and thermal-efficiency are required. Emshield DFR CE is used in floors and decks. In deck and roadway usage it can be manufactured with a traffic-grade silicone surface and can be used alone or under any other movement joint cover, plate or filler where depth of substrate allows.
Watertight – Emshield DFR CE and WFR CE are manufactured with tensionless silicone bellows, which when installed with an optional silicone bead on the weather face, maintains a watertight seal in accordance with NF 12154 testing.
Fire Resistance – The fire-retardant-impregnated foam, when properly installed, ensures a 1, 2, 3 or 4-hour fire protection in accordance with EN 1366-4 testing.
Sound Attenuation – Emshield DFR CE and WFR CE minimize sound transfer which often occurs at the expansion gap.
The Rs.w (C ; Ctr) : is greater than or equal to 54 (-1 ; -3) in accordance with NF EN 10140-2 (2013) and NF EN 12999-1 (2014)
Non-Invasive Anchoring – There are no hard metal-to-substrate connections with either Emshield DFR CE or WFR CE. The systems are fastened to the joint faces by means of the 1) backpressure of the foam, 2) the epoxy adhesive, and 3) the injected sealant bands at the joint face.