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HARDROCK® Multi-Fix Angle Fillet is manufactured from high density ROCKWOOL insulation and produced with an integral mineral coated glass fibre fleece. It is non-combustible, heat resistant and designed to fully support bituminous waterproof membranes at 90° abutments, providing a smooth transition between the horizontal and vertical interface.


  • Excellent heat resistance, ideal for torch applied bitumen systems.
  • Excellent dimensional stability.
  • Prolongs the life of the waterproof membrane.
  • Cost effective and easy to install.
  • A single size solution which is compatible with all bituminous and GRP membrane systems.
  • Secures a strong bond to the waterproof membrane.
  • Provides the perfect finish at 90° abutments.

General information

75 x 30 x 1200 mm

Uniclass 2015
Pr_35_90_07_04 Angle filletsPrimary

J21/10 Warm deck roof coating

J21/425 Mineral wool warm deck roof insulation

J31/10 Warm deck roof coating

J31/334 Mineral wool warm deck roof insulation

J41/10 Built-up reinforced bitumen membrane warm deck roof covering

J41/425 Mineral wool (MW) warm deck roof insulation

J42/10 Warm deck roof covering

J42/425 Mineral wool (MW) warm deck roof insulation

Specification data - Angle fillets
Product Reference

ROCKWOOL Angle Fillet

Standard product features


75 x 30 x 1200 mm.


Fleece faced.

Fire classification:

A1 (to BS EN13501-1).

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