Profiled Metal Roofing & Cladding

Coating Failure & Commercial Metal Roof Repair

Problem: Coating Failure

The lifetime of a coated steel sheet may be defined as the time it takes to reach the stage where re-coating is necessary to preserve its performance or aesthetics. This can often be predicted using manufacturers’ projected performance data. Prime indicators are when the coating starts to fade, craze and/or delaminate or, on smooth finish coatings, when it starts to blister and spot corrode.

Some of the main reasons for coating aging are as follows:

Profiled Steel Repaint

  • UV exposure makes paint hard and brittle limiting its ability to expand and contract with the substrate, affecting adhesion & causing it to delaminate.
  • Moisture laying on the surface can penetrate a coating causing discolouration, lifting and corrosion on a steel substrate.
  • Important pigments added for colour, UV stability etc. are lost through chalking, a natural self-cleaning process where paint literally wears away.

The good news is that it’s usually the coating and not the sheet itself that needs replacing. Caught in time, most roofing and cladding can be treated and its protection indefinitely preserved. So if you’re looking for a metal roof repair solution, then GIROSIL® is the answer.

Treatment: GIROSIL® RoofCoat RC

GIROSIL® is NEW generation silicone hybrid coating system for reinstating long-term protection to profiled metal sheets, benefitting from properties which can often provide better protection than the original coating for the following reasons:

Treatment: Delcote Architectural Coating

  • GIROSIL® is highly UV resistant and temperature from -100oC to +250oC
  • GIROSIL® remains flexible and can easily accommode sheet movement.
  • GIROSIL® repels water, preventing moisture from laying on the surface
  • GIROSIL® will not sacrificially erode.
  • GIROSIL® is solvent free, releasing no VOC emmissions.
  • GIROSIL® incorporates laminar flake, offering matchless corrosion control.

Benefits of Delcote® Architectural Coating………………………………………..


GIROSIL® RC requires little preparation and provides 200 micron one coat protection at least comparable with Plastisol. GIROSIL® RC is applied as a system on roofs, to seal laps, bolts & cut edges. This, ensures that, unlike conventional coatings, the weakest details are equally protected.

Read more about GIROSIL ® RoofCoat RC

Cut Edge Corrosion

Problem: Cut Edge Corrosion

Corrosion commonly starts as edge peel at the cut edges of a metal sheet. It develops through normal weathering, mainly on roofs and rapidy accelerates, especially at the sheet overlap as a result of capillary held rainwater.

Edge corrosion is a progressive problem and, if neglected, can develop away from the cut edge, destroying the weather-sealed lap joint and gutter overhang. Early detection and effective treatment prevents costly future sheet replacement.

Treatment: Seamsil 100


GIROSIL® EDGE RC-E is the revolutionary next generation of coatings from Giromax, designed to treat both the top and reverse side of the cut edge through matchless corrosion treatment and encapsulation. Fully moisture tolerant GIROSIL® provides a strong, flexible external joint that can be installed without disturbing existing fixings and sheets and remains unaffected by UV or weather and temperature extremes.



Benefits of Seamsill 100GIROSIL® EDGE RC-E has been developed against a background of decades of experience of roof repair and is designed to overcome application limitations imposed by adverse weather conditions. It is a fully moisture tolerant system, incorporating laminar flake tecnology in both Basecoat and Sealant followed by brush applied coloured Topcoat.

Its application simplicity makes GIROSIL® EDGE RC-E a cost effective  cure for cut edge corrosion treatment and is offered with a 15 year performance guarantee.

Read more about GIROSIL® EDGE RC-E