Isomass Isocheck Expandastrip Frame Seal

Isocheck Expandastrip is an open-cell Polyurethane foam, impregnated with chemically stabilised acrylic and supported by a self-adhesive scrim tape.

Expandastrip maintains permanent elasticity, expanding upon application to fill joints, including any irregularities or imperfections. With its remarkable flexibility and elasticity, it is ideal for uneven surfaces and is suitable for use with materials such as concrete, brickwork, steel, plastics, timber, and fibrous substances.

Supplied in rolls, Expandastrip is mechanically compressed to one-sixth of its original thickness, with a self-adhesive coating on one side. When fully expanded, it provides a light air baffle. Additionally, if expanded by only 25% of its compressed thickness, it can create a weather-tight seal against driving rain and wind.

Expandastrip is perfect for sealing joints between precast units, around door and window frames, and between corrugated roofing panels, roof structures, and roof lights, as well as in ventilation and air conditioning ductwork.

It is also used as a primary or secondary seal in both vertical and horizontal joints of building facades, metal cladding systems, window perimeter curtain walling, and skylights.

Typical Applications include:

• Acoustic sealing of gaps between floors and walls
• Weatherproof sealing around windows and doors
• Weatherproof sealing of profiled sheeting
• Weatherproof sealing of expansion joints
• Weatherproof sealing of prefabricated sections
• Air and dust sealing in domestic dwellings