Product Description
HOW OSPHO WORKS
When applied to rusted surfaces, it resists/retards rust in chemical change on drying to a tough, hard surface ready for priming. A paint job will last longer after an application of OSPHO because subsequent paint coating securely attaches itself so that moisture and oxygen normally do not attack the metal. OSPHO is water-thin, can cover a larger area than paint, and goes on easily. It is equally effective for exterior and interior work alike. SKYCO OSPHO: a balanced formula of Phosphoric, Dichromate, Wetting Agents and Extenders . . . compounded exclusively by the Skybryte Company since 1947 ... recommended by paint manufacturers.
RUSTED METALS - OSPHO is a rust-inhibiting coating - NOT A PAINT You do not have to remove tight rust. Merely remove loose paint and rust scale, dirt, oil, grease and other accumulations with a wire brush - apply a coat of OSPHO as it comes in the container - let dry overnight, then apply whatever paint system you desire. When applied to rusted surfaces, OSPHO causes iron oxide (rust) to chemically change to iron phosphate - an inert, hard substance that turns the metal black. Where rust is exceedingly heavy, two coats of OSPHO may be necessary to thoroughly penetrate and blacken the surface to be painted. A dry, powdery, grayish-white surface usually develops; this is normal - brush off any loose powder before paint application.
NEW METALS - For new ferrous or aluminum metals: remove dirt, grease, or oil; apply OSPHO, let dry overnight, then paint.
GALVANIZED - where appearance is important, apply one coat of OSPHO, let stand for approximately thirty minutes or until metal is etched. Flush with water, avoiding damage to adjacent areas; or wipe to a smooth finish, let dry, then paint. Where appearance is not important, one coat of OSPHO is recommended to thoroughly coat and etch the metal. Let stand overnight or until completely dry. Brush off any loose powder before painting.
A typical paint application will last much longer after an application of OSPHO because subsequent paint coatings attach themselves so tightly that moisture and oxygen cannot attack the metal. OSPHO is water-thin, and therefore goes on easily and covers a larger area than paint. One gallon covers approx. 600 square feet. Historically, best results have been achieved using an oil-base primer and topcoat. Test a trial sample before using under epoxy or latex-base paint applications. OSPHO is equally effective for exterior and interior work alike and is highly recommended as a pre-treatment coating by leading paint manufacturers.
For best results, use OSPHO at temperatures no lower than 36 degrees F. Excessive dew and humidity may prolong drying time and cause powdery buildup.
Spray equipment should be flushed out with water after using. Clean brushes with water. Avoid getting OSPHO on adjacent areas such as painted surfaces, concrete, masonry and stonework. If splashing occurs, flush immediately with water to remove.
WARNING: OSPHO contains phosphoric acid. KEEP OUT OF REACH OF CHILDREN. If taken internally give large quantities of milk or water. Call physician. Avoid contact with eyes. In case of contact, flush with water. Prolonged exposure to skin may cause irritation - use rubber gloves or other forms of skin protection.
SAFELY DISSOLVES BLEEDING RUST FROM MANY PAINTED SURFACES:
CAUTION: paint composition & quality vary greatly. A check should be made by testing OSPHO on a small area. Dulling or peeling may occur in some finishes. The manufacturer assumes no liability for damage to finished surfaces.
Safety Information
Product Videos
Product Reviews
3 Reviews Hide Reviews Show Reviews
-
Good product and a job well done, thanks
I could not find Ospho locally, altho many other products were available. i ordered a gallon since the shipping was a large part of the price. I got it quickly and was packaged well. I applied it to the rusty old tractor and in a couple of days it had done it's thing. I need to wire brush it and paint when I get a pretty day. i'm pleased with the product, the prompt shipping, the price, and Caswell's interest and concern in providing good customer service. Thanks for a job well done.
-
good rust remover
good rust remover
-
Great for converting rust on cast iron
I used this product to remove (convert) rust on the cylinder heads of my Harley Ironhead Sportster. It was very easy to apply and it was a breeze getting into all the nooks and crannies between the fins on the heads. The white powder residue was also easy to brush off - used nylon as well as brass tube brushes to get in between the fins. The converted rust was really well encapsulated and quite hard - withstood vigorous brushing - even when using a stiff brass brush.
Important Information
Additional Equipment May Be Required
For Our Tank Plating Kits:
- Copper Pipe for tank bar
- Copper Wire to hang items
- Small amount of electrical wire to make connections
- DC Power Supply - Included In Some Kits. Check kit contents on web site
- Optional Rinse Tanks (or rinse over the plating tanks with a water bottle)
- Other minor household items may be required, such as gloves, water etc.
For Our Anodizing Kits:
- DC Power Supply (Standard Kit Only)
- 1 Gal Battery Acid
- Dyes (if desired)
- Optional Rinse Tanks (or rinse over the plating tanks with a water bottle)
- Other minor household items may be required, such as gloves, water etc.
Learn More Before Buying
You can purchase our Caswell Plating Manual and learn how to use the kits, before purchasing a kit. Simply Order Here. When you are ready to buy, we will discount the price of the kit.
Already Have Our Plating Manual?
If you are ordering a plating kit that contains our Plating Manual, and you already have our Plating Manual, you can remove it from all kits that contain it and save $30 per kit. Just use Coupon Code NOMANUAL in your Shopping Cart at checkout.