| For a Step-by-Step illustrated explanation of using POR-15® Rust Preventive Paint, see our How It Works page. |
POR-15® PRODUCT DESCRIPTION
  POR-15 Semi-Gloss Black Paint - 1 Qt. POR-15 Semi-Gloss Black Paint - 1 Gal. |
POR-15 is easier and less expensive to apply than epoxies, since it doesn't require mixing: and POR-15 dries to a high-gloss or semi-gloss finish just like paint, except that it cannot be scratched or peeled off.
Since POR-15 chemically bonds to metal, the underlying surface does not have to be sanded before application. As long as loose or flaking rust are removed from the surface, an application of POR-15 will not only cover up the rust and prevent it from spreading, but will also strengthen the underlying metal and seal holes by forming its own membranes.
POR-15 is a rust-preventive paint designed for application directly on rusted or seasoned metal surfaces. It dries to a rock-hard, non-porous finish that won't chip, crack, or peel, and it prevents rust from re-occurring by protecting metal from further exposure to moisture. POR-15 is sensitive to UV light (sun) and must be top coated before prolonged exposure to sunlight. POR-15 is cured and strengthened by exposure to moisture and will dry faster under extreme humidity, but moderate to dry atmospheric conditions are most desirable when applying this product, because extreme humidity may cause an immediate surface cure, trapping carbon dioxide gas below the surface. When this happens, bubbling may occur. Extreme humidity at the time of application may also interfere with proper adhesion of the POR-15 coating to metal because it's almost impossible to keep metal dry under such conditions.
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POR-15 Semi-Gloss Black Paint - 1 Qt. POR-15 Semi-Gloss Black Paint - 1 Gal. |
CHARACTERISTICS
Solids - 74%
Vapor Pressure - 38mm
Hg: Boiling Point - 232°F
Specific Gravity 1.05
Percent volatile by Volume 25%
Weight per quart - 2.25lbs.
Solubility in water - insoluble.
Appearance:
Glossy or Semi-gloss (black only) finish.
Application: Brush, roller, spray
Spreadability: 96 sq. ft. per Quart, 384 so. ft. per gallon.
Recommended Temperature Application: 45°F - 95°E
Drying Time: Varies according to humidity; average is 4.5 hours.
Shelf Life: Unopened can - 2 years or more. Opened can - up to 6
months.
Abrasion Resistance: Using Taber Abrasion Test, POR-15®
passes 200 cycles with a 100 gram weight on a CF17 Wheel.
Solubility: POR-15 is readily soluble in
esters. ketones, and aromatic solvents.
POR-15 APPLICATION PROCEDURES
Surface preparation:
Rusted surfaces are best; seasoned metal and sandblasted surfaces are also good.
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POR-15 Semi-Gloss Black Paint - 1 Qt. POR-15 Semi-Gloss Black Paint - 1 Gal. |
Use POR-15 Prep & Ready to prepare surface before painting. Surface must be dry and free of grease, oil, or other foreign substances. Use of 'rust converter' products is not recommended as they may affect bonding of POR-15 to metal. POR-15 likes to adhere to surfaces with 'tooth' rather than smooth, glossy surfaces.
STIR CONTENTS GENTLY AND THOROUGHLY before painting.
Do not shake.
Refrigerate unused portion of POR-15 for longer shelf life.
Apply in thin coats, 1 to 2 mil thickness. Minimum 2 coats.
Topcoat when first coat is dry but with slight
finger-drag remaining, usually 4-5 hours.
SPRAY APPLICATION:
Use 30-35 lbs pressure for normal gloss.
Reduce pressure for lower gloss (20-25 lbs).
Thin only with POR-15 Solvent, if necessary,
but do not thin more than 5%.
TO TOPCOAT A FULLY CURED POR-15 SURFACE:
Wet sand with 600 grit until gloss is dull, then paint,
or use POR-15 Tie-Coat Primer directly on the cured
POR-15 surface, then topcoat as desired.
NOTE:
Never topcoat a POR-15 surface that
hasn't dried, as this will ruin the coat already down.
Use POR-15 Solvent or lacquer thinner for cleanup, which must be done before POR-15 dries. NOTE: Organic vapor particulate respirators, NIOSH/MSHA approved, must be used when spraying POR-15.
Moisture will shorten the life of unused POR-15. Seal can or jar immediately after using. We recommend placing plastic wrap between lid can and storing in a cool dark place.
APPLICATION OF POR-15 TO NEW METAL
For proper adhesion to aluminum, galvanized metal, and smooth steel surfaces, prep with POR-15® Prep & 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.
TYPICAL APPLICATIONS
 | Use as a primer or finish coat |
| Automobiles: fenders, floorboards, bumpers. trunk areas, engine compartments, rockers |
| Trucks, trailers, agricultural equipment, snow removal and highway equipment |
| Storage tanks, bridges, boats, factory machinery |
| 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 |
| Use on lawn mower housing to prevent rust; keep grass from sticking and clumping in wet weather. |
WHICH FORMULA TO USE?
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POR-15® SILVER contains metal filler and should be used on badly rusted steel to fill small holes and pitted areas. |
| POR-15® BLACK is used on frames, floorboards. under fenders, engine compartments. trunk areas, etc. |
| POR-15® CLEAR dries to a perfect satin gloss, used on exterior surfaces before painting. Excellent for "touch-up". |
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POR-15® GRAY is ideal for use on concrete. |
ADVANTAGES OVER MOST DUAL-COMPONENT COATINGS
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
ULTRA-VIOLET SENSITIVITY
POR-15® is sensitive to UV light (sun) and must be topcoated for prolonged exposure to sunlight. Failure to do this may result in long-term damage to the POR-15® coating. Topcoating is not required for areas not exposed to sunlight.
POR-15 Semi-Gloss Black Paint - 1 Qt.
POR-15 Semi-Gloss Black Paint - 1 Gal.
LABORATORY TEST RESULTS
POR-15® 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 tests performed found panels coated with POR-15® to be impervious to gasoline, oil, chromic acid, hydrochloric acid, phosphoric acid, sodium hydroxide, caustic soda, 50% sulfuric acid, and 50% hydrofluoric acid. POR-15® was applied over a rusty substrate as a finish coat (approximately 23 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 POR-15® 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 days after application of the first coat. In an actual Field test, a topcoat was applied 6 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 POR-15® 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 POR-15® coating was subjected to 700°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 POR-15® 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).
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POR-15 Semi-Gloss Black Paint - 1 Qt. POR-15 Semi-Gloss Black Paint - 1 Gal. |
Rust is caused by moisture coming in contact with metal, which causes a chemical action called oxidation. All paints provide a measure of protection for a while, but since they are eventually softened and weakened by moisture, it is only a matter of time before moisture penetrates the painted surface and attacks the metal below. All of the so-called rust preventive paints on the market (except POR-15) are weakened by exposure to moisture. POR-15 is strengthened by exposure to moisture. Notice the hardness of the POR-15 coating. It doesn't chip, crack, or peel like ordinary paints do, and its hardness will resist the wear and tear of every day life.
Rust conversion products claim to change the chemical nature of rust and convert it to a more stable element that won't rust again. History of the failure of these products is well documented; most simply don't work for more than a few months at best, and they are subject to the same chipping and cracking that occurs with ordinary rust coatings.
POR-15 works because it chemically bonds to rusted metal and forms a rock- hard, non-porous coating that won't crack, chip, or peel. It keeps moisture away from metal with a coating that is strengthened by continued exposure to moisture.
IS IT BETTER TO BRUSH OR SPRAY POR-15?
Most people brush it on, but many spray also. Proper equipment and organic
vapor particulate respirators for solvents are essential for spraying.
HOW DO I THIN POR-15 IF I WANT TO SPRAY IT?
You should use only POR-15 Solvent for thinning. Keep lacquer thinner
handy for clean-up. Do not thin POR-15 more than 5%.
CAN I PAINT OVER POR-15 WITH OTHER PAINTS?
Absolutely. POR-15 will accept all paints, including lacquer-based paints.
POR-15 Tie-Coat Primer is the best prime coat to use before topcoating POR-15.
Be sure to read thoroughly our directions and tip sheets regarding topcoating
before using POR-15.
CAN I USE BODY FILLER OR PUTTY WITH POR-15?
Yes. First paint both sides of the rusted area with POR-15; then use body
filler or putty as soon as the POR-15 is dry to the touch.
HOW LONG DOES IT TAKE POR-15 TO DRY?
That depends on the ambient humidity (surrounding area). The more humid
the area, the faster the dry time, which usually varies from 3 to 6 hours.
IS IT DANGEROUS TO GET POR-15 ON MY HANDS?
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POR-15 Semi-Gloss Black Paint - 1 Qt. POR-15 Semi-Gloss Black Paint - 1 Gal. |
ARE THE POR-15 VAPORS DANGEROUS TO MY HEALTH?
Yes. That's why you must always paint in a well-ventilated area and keep
your nose away from the paint container. POR-15 is not dangerous if you
follow our simple directions.
WHAT IS THE BEST SURFACE ON WHICH TO PAINT POR-15?
POR-15 likes rusted surfaces best. Seasoned metal and sandblasted metal
are also good. POR-15 does not adhere well to smooth, shiny surfaces, but
will adhere well to those surfaces with the proper preparation.
WHAT IS THE 'PROPER PREPARATION'?
We make a product called 'Prep & Ready'. It's a rust remover that leaves a
zinc phosphate coating on base metal, the perfect preprimer for POR-15.
NOTE: New steel is coated with a protective oil finish at the mill. This
finish must be removed before using POR-15 or Prep & Ready. Clean metal first
with POR-15 Marine-Clean, then rinse with water and dry.
WHICH POR-15 (BLACK, SILVER, GRAY, CLEAR) SHOULD I USE?
Silver contains metal filler and should be used in badly rusted, pitted
areas. It will fill in holes better than black or clear. Black is generally
used on frames, underside of fenders, etc. because that's the usual color
there. Clear renders the smoothest finish and is often used as a preprimer on
exterior surfaces; Gray is great on concrete floors, bilges, storage areas, as
well as steel.
MUST I PAINT OVER POR-15 TO MAKE IT LAST?
No, but POR-15 has an ultra-violet sensitivity and must be topcoated if
continually exposed to sunlight. Once topcoated, POR-15 will remain effective
for many years.
WILL THE SUN DESTROY MY POR-15 COATING IF I DON'T TOPCOAT IT?
No, your POR-15 protection will remain, but the sun will change its appearance
cosmetically. That's why we recommend you topcoat it.
CAN I APPLY POR-15 OVER OTHER PAINTS?
Yes, but you will lose the important benefits of POR-15. You must remember
that ordinary paints are weakened by exposure to moisture. POR-15 can't stop
rust if it isn't in direct contact with the base metal.
CAN POR-15 BE USED WITH FIBERGLASS?
Absolutely. POR-15 is fully compatible with fiberglass and can be used to
repair cracks in gelcoat. It will adhere better than polyester resin and has
greater strength. Use also with fiberglass cloth to make super-strong
surfaces in rusted-out areas. But be aware that POR-15 doesn't contain styrene
and thus cannot melt fiberglass cloth like polyester resin does.
APPLYING POR-15 TO SEASONED OR RUSTED METAL: First, wire brush loose rust and scale. Then remove any grease or oil with POR-15 MARINE=CLEAN and prep with POR-15 Prep & Ready. DO NOT USE SOLVENT- BASED CLEANERS.
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POR-15 Semi-Gloss Black Paint - 1 Qt. POR-15 Semi-Gloss Black Paint - 1 Gal. |
PRIMING OVER POR-15: Use POR-15 Tie-Coat Primer after POR-15 is dry, following directions on can. Tie-Coat Primer may be sprayed or brushed in multiple coats if desired. Sands to a perfect finish.
CHROME MOULDING CLIPS can scratch a new paint job when they are pushed through the body. POR-15, even if scratched off, will only rust where it's removed, so rust won't travel upward to ruin that new paint job. Coat around holes and under chrome before you prime and paint.
ROOF DRIP RAILS are a place where rust begins early. Put on a coat of POR-15 and let dry. Then apply a second coat, wait for it to dry, then apply a coat of POR-15 Tie-Coat Primer and topcoat as desired.
STAINLESS STEEL TRIM PIECES that push down around the windshield... if they won't stay down, put some POR-15 in the channel and brace it with wood strips overnight. Regarding windshields, with the rubber removed, put a coat of POR-15 around the body where the rubber rests; this is a high humidity area and should be sealed with POR-15. POR-15 INSIDE REAR EXHAUSTS will stop rust where it starts.
LOWER COWL SECTIONS, ROCKER PANELS, LOWER PORTION OF FENDERS AND REAR QUARTERS, INSIDE DOORS are other good places to coat with POR-15.
RUSTED OUT PINHOLES: Put a piece of tape behind the larger pinholes, then paint. When the paint dries, pull the tape off and paint the back side as well. POR-15 can be used to seal gas tanks, also, and POR-15 PUTTY will take care of larger holes.
OLD CARDBOARD INTERIOR PIECES AND MOLDED VINYL VISORS can be coated with POR-15 and then painted over with vinyl dye.
Reminder: POR-15 SHOULD BE STIRRED, not shaken, each time you use it.
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