Paint Over Rust with Extend Rust Neutralizer

Available Sizes: 8.0 fl. oz.


Color When Dry: Black



Where to Buy


Loctite® Extend Rust Neutralizer

Before Painting over Rust

Safety Precautions

Well-ventilated area, rubber or plastic gloves, safety glasses.


May stain skin. Wear gloves. Protect finished surfaces. Remove loose rust, dirt and oil. Sand with coarse sandpaper (50 grit) or wire brush. Some rust must remain to be converted. Caution: The product may cause rust if applied to a non-rusted surface. Surface Preparation: Old Steel: All loose or flaky rust, dirt, oil, paint and all other contaminants must be removed. Only conversion of firmly bonded rust will result in durable protection. Loose rust, mill scale and oil paint should be removed preferably by power wire brushing, followed by rinsing with water to remove powder and solubles. Manual wire brushing, chipping and scraping can also be used. Rust Conversion Time and Appearance: Two coats of Loctite® Extend Rust Neutralizer are recommended. On lightly rusted steel (that has been wire brushed), the first coat will start to develop a violet color within 60 seconds. This will become satin to flat black in appearance. The second coat should dry to a satin black appearance. On heavily rusted steel (that has been wire brushed), the first coat should develop a purple-black color within seconds. The second coat should dry to a black color with gloss varying from flat to satin. The second coat should be applied within 15 to 30 minutes of the first coat.


Ensure material is mixed thoroughly before using. Shake bottle before use. Remove oil, dirt and grease from surface. Wire brush to remove flaky rust and loose scale. Some surface rust must be present. Brush or sponge on affected area liberally and evenly. A black coating will appear within 5 minutes. Uneven color indicates need for additional coats for maximum protection. Recoat time 15 to 30 minutes. Allow 24 hours minimum to dry before finish paint. Most finish paints will not require any additional primer. However, light color latex and metal filled paints require a solvent based primer on top of Loctite® Extend Rust Neutralizer before finish application. Brushes, rollers and other tools should be cleaned immediately with soap and water. Loctite® Extend Rust Neutralizer is extremely difficult to remove once dry. Brush on lightly and evenly. Apply 2 to 3 coats allowing no more than 20 minutes drying time between coats. Final application should dry to a black finish. Wait for 24 hours before applying top coat. If not top coating, protect from moisture and humidity and use third coat of rust neutralizer 24 hours after applying the second coat. For a smooth finish, sand with 320 grit sandpaper before top coating. Do not sand after top coating. This will break the barrier and will cause future rust. Resistance to Moisture, Solvents & Chemicals: Loctite® Extend Rust Neutralizer should be painted for many applications. Continuous exposure of Loctite® Extend Rust Neutralizer to water, solvents or chemicals can cause whitening, blistering or flaking of the latex film. Loctite® Extend Rust Neutralizer should not be used in applications involving continuous immersion in water or fluids. It should be painted with products known to be resistant to the environment expected. Latex paints are not recommended without a suitable barrier coat.


Uncured rust neutralizer can be removed with rubbing alcohol or mineral spirits. Cured rust neutralizer can be removed with paint stripper or by sanding.