EPDM Coatings/Liquid Roof/Liquid Rubber may be applied on roof decks, gutters, structural steel, air conditioner enclosures, cooling towers, galvanized steel, unit heater flues, smoke stacks and chimneys, fiberglass and non porous masonry surfaces. Surface to be coated should be clean, dry and structurally sound. Fasten loose areas with adhesive (contact cement) or pop rivets. Oil or wax must be completely removed.
All surfaces to be coated should be clean and dry. Remove peeling paint and brittle caulking. Heavy build ups of asphalt roof cement should also be removed. Tighten any loose fasteners and replace those which are severely corroded. Repair or replace roof panels damaged by storms. Remove heavy rust with abrasive discs or wire brushes. Power washes all surfaces to be coated and allow drying thoroughly. Caulk all gaps wider than 1/16 inch which are not expansion and contraction slip surfaces.
Remove loose portions of existing coatings and brittle caulk with scraper and wire brush before using Liquid EPDM. Whatever still has good adhesion may remain to be re-coated.
Rusty or pitted metal should be wire brushed to remove loose oxide. Tightly adhering corrosion may be recoated. Asphalt based aluminum coatings should be removed as much as possible by wire brush or abrasive disc. Roof cement should be removed and replaced with butyl caulk where necessary.
Repair torn rubber by re-gluing loose areas with contact cement. Coat exposed edges with contact cement to prevent solvent absorption from Liquid EPDM Roof/Liquid EPDM Rubber. A rubber patch may be applied over torn area if desired. Remove chalk from white rubber membrane by brushing with a detergent solution followed by a water rinse or working surface with a stiff brush. Smooth metal or plastic surfaces should be roughed up to improve adhesion of Liquid Roof/Liquid Rubber A de-glossing solvent may work on some plastics.
For Large Commercial Projects: Airless or Air Atomized spraying, Airless equipment needs only one hose from pump to gun but must generate 3500-4000 psi pressure and is limited in the length of hose which can be used because of high pressure drops. Air atomized equipment requires two hoses to the gun making it more cumbersome to maneuver plus the addition of a compressor.
Liquid Roof is the only liquid EPDM Rubber product currently on the market.
Equipment specifications:
PUMP -capable of delivering 3-4 gal/min. at 3500-4000 psi
HOSE if 3/8 inch ID max. permissible length is 150 feet
when using .019 tip
if 1/2 inch ID max. permissible length is 200 feet
when using .21 tip
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