Monarflex® Top-Hat

Monarflex® Top-Hat

Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type


One-piece, vacuum-formed LDPE collar.

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A one-piece, vacuum-formed LDPE collar designed to seal 110 mm diameter pipes. In some circumstances it may not be possible to fit the collar over a pipe, if for example there is a socket or bend at the critical point where the pipe penetrates the radon membrane. In these situations, Easi Pour™ Liquid Radon Sealant should be used.

Necoflex RAM system:

Can be used with other products to form the radon, air and moisture protection system for ground floors in buildings. It is used to seal floors, walls and service penetrations, thereby ensuring the necessary degree of separation between the interior spaces of a building and the underlying soil.

General information

Uniclass 2015

Pr_35_90_30_64 Polyethylene (PE)-based flashingsPrimary


J40/370 Preformed collars for pipes, ducts, cables, etc.

Specification data - Polyethylene (PE)-based flashings Enhanced data

Product Reference

Monarflex® Top-Hat

Standard product features



Third party certifications
  • IAB: Certificate: 09/0328
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