Icopal FormFlash Lead Free Anti-Theft Waterproof Flashing

FormFlash Technical Data & Installation

FormFlash lead replacement flashings are manufactured from SEBS modified bitumen on a malleable aluminium mesh finished with a fine grey granular finish on the outer face and a polyethylene film on the inner face.


FormFlash is installed and worked in a similar way to traditional lead flashing.
When installed in exposed conditions FormFlash should be mechanically fix with appropriate fasteners.

FormFlash can be worked in the same way as lead, without the need for protective measures, except for wearing gloves to protect from cuts, and:

  • Can be cut with a sharp knife or tin snips;
  • Can be secured using FormFlash fixing clips;
  • Is compatible with other building materials.


Technical Data:

Roll Length: 10m 
Nominal Roll Widths: 120mm, 150mm, 200mm, 250mm, 300mm, 450mm, 650mm  & 950mm
(Other widths available to special order).
Thickness: 4mm
Weight per m²: 4.75kg/m²
Colours Available: Grey 

Cold Bend: Remains flexible down to -20°C
UV Resistance: Accelerated weathering at 90 days no change. Natural weathering on going with no change in excess of 90 days.
Minimum Working temperature: Normal temperatures for roofing works.
Warm material gently with a flame free heating gun to ease use in cold conditions.



We recommend the use of FormFlash Sealant for pointing. Icopal FormFlash and associated products are compatible with most materials normally associated with building works.

However solvent based products and timber preservatives containing solvent may soften bitumen and other products and special care should be taken when selecting materials likely to come into contact with FormFlash.
If in doubt regarding compatability contact Icopal Technical Services.

    Contact Icopal 0161 8654444

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