GENERAL INFORMATION

PORPATCH is a thick, pudding-like substance which acts as a total rust inhibitor and is also very effective as a metal filler. PORPATCH can be easily brushed, or trowelled. It chemically bonds to rusted steel to form a rock-hard, non-porous coating that won't crack, chip, or peel. Because it is actually POR-15 in a thickened state, it works by isolating metal from moisture; without moisture present, steel can't rust. PORPATCH is easier and less expensive to apply than epoxies because it doesn't require mixing. Since PORPATCH actually bonds chemically to metal, the underlying surface does not have to be sanded before application. As long as loose or flaking rust is removed from the surface, an application of PORPATCH will not only cover up the rust and prevent it from spreading, but will strengthen the underlying metal and seal holes by forming its own membranes.

APPLICATION OF POR-15 TO NEW METAL

For proper adhesion to aluminum, galvanized metal, and smooth steel surfaces, prep first with POR-15 METAL-READY Rust Remover/PrePrimer. Keep surface wet for 15 minutes, then rinse off with water and dry thoroughly. This process will leave a zinc phosphate coating on the metal and insure perfect adhesion.

LABORATORY TEST RESULTS

PORPATCH was tested for 168 hours at 97°F in a condensing humidity salt spray (ASTM B117). At the end of the test period, coated steel was free of rust or pitting. Acid and alkali resistance test performed found panels coated with PORPATCH to be impervious to gasoline, oil, chromic acid, hydrochloric acid, phosphoric acid, sodium hydroxide, caustic soda, 50% sulfuric acid, 50% hydrofluoric acid. PORPATCH was applied over a rusty substrate as a finish coat (approximately 2-3 mils dry film thickness). The coating showed essentially no undercutting at the scribed area after 2000 hours in a weatherometer*.

A 2 mil thickness of PORPATCH was applied to lightly rusted steel and then exposed for 1000 hours to a salt spray. At the end of the test period, no undercutting was observed at the scribed area.

Recoatability is excellent.

Laboratory tests have shown very good adhesion when applied up to 14 hours after application of the first coat. In an actual field test, a topcoat was applied 2 weeks after the first coat had been applied, and the intercoat adhesion was excellent as determined by a crosshatch tape test. A metal box used as a filter for raw sewage was coated with PORPATCH and placed in service within a few hours after the interior and exterior were coated. No visible rusting occurred at the welded areas after a six month exposure.

A PORPATCH coating was subjected to 500°F for 10 hours; it remained hard and showed no apparent loss of adhesion.

A panel subjected to elongation was pulled beyond the yield point of the base metal without affecting the PORPATCH coating.

*WEATHEROMETER - Dew cycle XWR with corex D filter, cycle is:
1. 30 minutes sun, 135°F, 30% relative humidity.
2. 30 minutes dark, 75-80°F, 100% relative humidity (achieved with water spray on panel backs).

TYPICAL APPLICATIONS

Use as a primer or finish coat. Automobiles: fenders, floorboards, bumpers, trunk areas, engine compartments, rockers. Trucks, trailers, storage tanks, agricultural equipment, snow removal and highway equipment, factory machinery, bridges, boats, all types of marine use. Outdoor sign supports, fencing, metal roofs, fire escapes. Use to waterproof insulation or wood. As a filler for metal. Use as a bonding agent on wood or styrofoam. Prevents rust in refrigeration units where moisture corrodes metal.

ADVANTAGES OF PORPATCH OVER MOST DUAL-COMPONENT COATINGS OR SEALERS

Better chemical resistance, better adhesion to metals, greater ease of application, strengthened by exposure to moisture. Reasonable pot life, non-shattering, great flexibility. No catalyst required for curing.

CONTAINER AVAILABILITY:

- Tube
- Quart
- 5 Gallon Pail
- 55 Gallon Drum