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Rockwool RockReveal

An insulated cavity closer consisting of a strip of Rockwool insulation encapsulated in weather-resistant polyethylene within a rigid PVC-U profile.

RockReveal is designed to close cavities around windows and doors without the need to return the blockwork, and is installed after the masonry is complete.

General information
Uniclass 2015
Pr_35_90_50_64 Plastics cavity closersPrimary

F30/18 Cavity closers

F30/180 Cavity closers

Specification data - Plastics cavity closers
Product Reference

Rockwool RockReveal


50 mm

80 mm

90 mm

100 mm

Standard product features


RockReveal provides 60 minutes integrity and up to 60 minutes insulation, to BS 476-20.


  • Rockwool insulation: 2 x 1.4 m.
  • PVC-U carrier: 2.4 m.

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