These products act to secure two leaves of a cavity wall to each other, allowing them to act as one structurally.
A cavity tie usually incorporates some mechanism, (usually a change of shape) to discourage moisture moving across the tie. Most cavity ties are available with a dedicated clip to secure insulation (usually in sheet form) within the cavity.
Multidrip feature to prevent moisture travelling across the cavity.
The design means that the tie can be installed either way up.
Tested as Type A (sound) Tested as Type 4 (strength) to BS EN 845-1