Wire brush rusty areas and treat with kill rust or similar.
Prime surfaces with metal etch primer.
Apply Butyl flashing tape over all joints and any holes.
Using brush, roller or spread UV polyurethane liquid membrane at 1.5li/sqm as 2 coats each 0.75li/sqm, one following the other as soon as cured but still tacky. (If you press membrane with a finger and it remains depressed, then not cured sufficiently. Use some polyethylene film to protect your finger).
Wire brush rusting away and treat with kill rust or similar.
3. When the primer is dry apply two coats UV resistant Polyurethane modified Acrylic liquid membrane for a total usage rate of 1.5 litres/m2.
Please note that the above advice assumes the roof is in good condition and not rusting. If there is rust on the roof the rust has to be removed and the metal treated with a rust converter before the primer is applied.
Please note that when the rust converter is dry the metal has to be wiped over with clean water and allowed to dry before the primer is applied. If the leak can be identified then the hole can be covered with Butyl tape after the primer has been applied and before the membrane is applied.
Waterproof Leaking Metal Roof Liquid Membrane:
Kemseal UV P14 Fibre
P14-Fibre is a liquid applied polyurethane modified copolymer waterproofing
membrane containing a fibrous filament reinforcing. When fully cured, Kemseal
P14-Fibre forms a Class III flexible waterproof lining to showers and wet areas
as described in AS 4858- 2004- Waterproofing Wet Areas Within Residential
building. Kemseal P14-Fibre may be applied to most building materials
including reinforced concrete, cement render, wet area plasterboard, compressed
fibre-cement sheeting, plywood and particleboard wet area flooring. Apply over Flashings, Balconies and Decks, Exposed
WPA 160 is a specialised, solvent free primer, designed to enhance the adhesion of subsequently applied waterproofing membranes, adhesives, toppings and decorative finishes, over porous or non-porous substrates. The unique formulation ensures outstanding adhesion over difficult to bond to surfaces and offers a safe and environmentally friendly alternative to traditional methods of etching and solvent based primers. Solvent free, fast drying, non-tacky. Suitable for bonding to a wide range of metals, plastics, glazed, smooth and dense surfaces. Excellent adhesion properties. Time saving, simplified application. Suitable for internal and external applications. Can be directly covered with waterproofing membranes, tile adhesives, mortars and paints.
S-80 is a 100% solids fluid applied single component elastomeric silicone
polymer roof coating that cures to provide a long term waterproof and
weatherproof protective seamless membrane layer for roof surfaces. Kemseal S-80
is manufactured using advanced silicone technology to provide superior UV
protection and ponding water resistance that prolongs the life of all existing
roofing systems providing immediate and long term cost and energy savings.
Kemseal S-80 coating (white) meets Cool Roof reflectance performance
requirements for both flat and sloped roofs considerably reducing thermal heat
intake into the building, saving considerable building energy cooling costs.
UV-stable top coat for polyurethane and other
membrane coatings. Protective coating to seal and repair existing roofing and
gutter systems. Restore rusted metal and asbestos cement roofing. Restoration
of aged roof membranes such as; torch-on, EPDM, and other sheet and liquid
applied membranes. Lining Box gutters