M Series: TYPE MD

A heavy duty, maximum security seal designed for exterior use on drains, manhole or inspection covers etc. Made from vulcanised rubber this security seal has two strips of interlocking security cuts either side of the aperture. It is supplied with a high bond spray adhesive for ease of application or two strips of mastic on the export version. The heavy-duty material means that the security seal does not wear or fracture when in use, furthermore the flexibility makes it suitable for uneven or unstable surfaces with excellent resistance to adverse environmental conditions.