DTM paint, or direct-to-metal paint, is a specialized protective coating that can be applied directly onto a metal surface without the need for a primer. This innovative type of paint is designed to simplify and expedite the painting process on a range of metal substrates, ensuring a durable and corrosion-resistant finish.
With DTM paint, you can experience a simpler, more efficient painting process by eliminating the primer coating. This not only reduces the number of required painting steps, but also offers long-lasting protection against rust, corrosion, and harsh environmental conditions.
DTM Paint Overview
As the name suggests it’s used for metal substrates but that’s not the only surface it can be used on.
What is DTM Paint Used For?
DTM (Direct-to-Metal) paint is a specialized protective coating designed specifically for metal surfaces. This type of paint can be applied directly to a metal substrate without the need for a primer.
It is commonly used for both interior and exterior applications on various metal surfaces such as machinery, equipment, pipelines, and structures.
The main purpose of DTM paint is to protect metal surfaces from corrosion but it can also be used on other surfaces such as:
- Structural Steel
- Previously painted surfaces
- Primed Galvanized and Aluminum surfaces
- Steel doors and decking
- Railings and fire escapes
- Machinery and equipment
- Storage tanks
- Piping and conveyors
- Bar joists
- Interior and exterior walls
- New construction projects
- Repaints
Additionally, it can be used on properly prepared and primed substrates such as:
- Iron and Steel
- Galvanized Steel
- Aluminum
- Drywall/Gypsum Board
- Plaster
- Stucco
- Concrete
- Masonry
- Brick
- Concrete Masonry Units
- Wood and Engineered Wood
- Architectural Plastics
Performance and Benefits
DTM paint offers several performance benefits when used on metal substrates. Firstly, it provides excellent adhesion to the surface, ensuring long-lasting protection and durability. This is important as metal surfaces tend to expand and contract due to temperature changes, putting stress on the paint film.
Another advantage of DTM paint is its rust-inhibitive properties. By applying a high-quality DTM paint, you can prevent the formation of rust and subsequent corrosion of the metal surface. This prolongs the life of your metal structures and equipment and keeps them looking and functioning at their best.
The use of DTM coatings also streamlines the painting process by eliminating the need for a separate primer. This can save you time and money as it simplifies the overall process and reduces the number of coats required.
Moreover, DTM paint typically dries quickly, allowing you to complete your projects faster. It also has a high resistance to chipping, cracking, and peeling, ensuring that your metal surfaces will remain protected over time.
DTM paint offers multiple performance benefits, such as excellent adhesion, rust protection, and a simplified painting process.
This type of paint can improve the look and longevity of your metal structures and equipment while saving you time and resources.
Recommended Products and Where to Buy
Photo: Behr.com
When it comes to purchasing DTM (Direct-to-Metal) paint, there are several reputable brands that you can consider for your project. One such option is the Sherwin-Williams Direct-to-Metal Alkyd Enamel. This high-build alkyd coating is designed for application directly on bare steel, offering rust-inhibitive properties.
Another recommended product for painting metal surfaces is BEHR PREMIUM Direct-to-Metal Semi-Gloss Paint. This 100% acrylic paint provides excellent corrosion and flash rust resistance while being engineered for excellent adhesion on a variety of properly prepared or primed residential and light commercial metal surfaces.
For those looking for another acrylic option, the Sherwin-Williams Pro Industrial DTM Acrylic is a popular choice. As part of the Pro Industrial™ High-Performance Coatings line, this product has garnered positive reviews from users for its performance on metal surfaces.
Lastly,Rust-Oleum’s 3800 System DTM Acrylic Enamel Paint is a fast-drying, water-based metal coating suitable for indoor and outdoor applications. The direct-to-metal coating offers excellent corrosion resistance and protection for surfaces exposed to mild to moderate environments, making it a versatile option for your project.
Application and Surface Preparation
When you have the DTM paint at hand follow these steps to properly prepare and paint your surface.
Gather the Appropriate Tools
To apply Direct-To-Metal paint, you’ll need the following tools:
- Cleaning tools: Before applying DTM paint, the surface should be thoroughly cleaned. You may need a detergent, commercial cleaner, or a degreaser to clean the metal surface and remove dirt, grease, and any foreign contaminants. A brush, sponge or cloth can be used for scrubbing the surface.
- Sandpaper or wire brush: To prepare the surface for painting, you may need sandpaper or a wire brush to remove any loose rust or deteriorated coatings. This helps in creating a smooth surface for better paint adhesion.
- Protective equipment: Wear safety goggles, gloves, and a dust mask or respirator when handling chemicals or sanding the surface to protect yourself from dust, debris, and fumes.
- Paintbrush: Use a high-quality synthetic bristle brush to apply the DTM paint. A brush with fine bristles will help you achieve a smooth finish on the metal surface.
- Paint roller: Use a high-quality synthetic fiber paint roller for larger surfaces. A roller with a 1/4″ to 3/8″ nap is suitable for most surfaces.
- Paint sprayer: For faster and more even application, you can use an HVLP or airless spray system. Make sure to choose the correct spray tip and pressure settings according to the paint’s specifications.
- Mixing tools: You may need a paint stirrer or a mechanical shaker to ensure proper mixing of the paint before application.
- Paint tray: Use a paint tray for the roller. Or just dip it in the can if the roller fits.
- Drop cloths/Masking paper/Masking tape: To protect surrounding surfaces from paint drips or overspray, use drop cloths, plastic sheeting, and painter’s tape to cover areas that you don’t want to be painted.
When you’ve gathered the materials you can move on to the cleaning of the surface.
Surface Cleaning
Before applying Direct-To-Metal (DTM) paint, the surface should be prepared as follows:
- Ensure the surface is clean and free of dirt, grease, oil, salt, and chemical contaminants. You can clean the surface using a suitable cleaner like Krud Kutter® Original Cleaner Degreaser, commercial detergent or other appropriate cleaners.
- If mold or mildew is present, clean the surface using a chlorinated cleaner or bleach solution.
- Rinse the surface thoroughly with fresh water and allow it to dry completely.
- For steel surfaces, use a wire brush or a power tool with the appropriate attachments to remove loose rust, mill scale, and deteriorated previous coatings.
- For previously coated surfaces, make sure the existing coating is sound and in good condition. If the surface is smooth, hard, or glossy then sand it with a fine-grit sandpaper.
Once the surface is dry and free of dust and debris you can move on to the next step which is painting.
Application Methods
Once your surface is properly prepared, you can proceed to apply the DTM paint. There are a few application methods to choose from, depending on your preference and the specific product being used. Some options include:
- Brush Application: Apply the coating using smooth, even strokes. Maintain a wet edge on each stroke to prevent lap marks and ensure a smooth finish.
- Roller Application: For larger surfaces or areas that require faster coverage, a paint roller is an ideal choice. Select a roller cover suitable for the paint being used and proceed to apply the coating using steady, overlapping passes.
- Spray Application: In some cases, spraying DTM paint may be the preferred application method, particularly for large or complex surfaces. Using a paint sprayer and following the manufacturer’s instructions for the specific product, apply an even coat of paint to the surface.
Remember to always follow the manufacturer’s application instructions and recommended drying times for the specific DTM paint brand you’re using. This can be found either on the can or on the manufacturer’s website.
2 coats of paint are usually needed for the best result. Even if you achieve full coverage on the first coat the second coat adds durability, evens out the finish, and enhances the color depth.
FAQs About DTM Paint
Here are some commonly asked questions about the topic.
Can DTM paint be used on wooden surfaces?
Although DTM paint is specifically formulated for metal substrates, it may also adhere to properly prepared wooden surfaces.
However, it’s essential to note that DTM paint may not provide the same level of durability and performance on wooden surfaces as it does on metal. For best results, it is recommended to use a paint specifically designed for wood applications.
Does DTM paint need primer?
Direct-to-metal (DTM) paints are designed for use on properly prepared metal surfaces without the need for a primer. However, some situations may still benefit from using a primer before applying the DTM paint. These situations can be:
Tinted DTM bases: When using a heavily tinted DTM paint or one with a high tint load, a primer may be recommended for optimal corrosion protection and better adhesion. Previously coated surfaces: If the existing surface has old paint or coating, a primer may be necessary to ensure proper adhesion and performance, especially if the existing coating is glossy or has peeling issues. Challenging substrates: Some substrates, such as galvanized steel or aluminum, may require a primer for better adhesion and protection. Severe or aggressive environments: If the surface is exposed to harsh conditions or aggressive environments with high levels of humidity, chemicals, or abrasive forces, using a primer before applying the DTM paint can offer better performance and corrosion resistance. Preventing staining and bleed-through: A primer can sometimes be helpful if there are concerns about stain-blocking or bleed-through on the substrate.
While DTM paints are designed for direct application to metal surfaces without a primer, certain situations may warrant using a primer for optimal performance, protection, and adhesion. Always refer to the specific product datasheets and manufacturer guidelines for the appropriate use of DTM products and primers.
Can you put DTM over rust?
DTM paint has rust-inhibitive properties and can be applied directly to bare steel. However, it’s essential to remove loose or flaking rust before applying the paint to ensure proper adhesion.
For surfaces with significant rust, it’s recommended to use a rust converter or a rust-inhibitive primer before applying the DTM paint.
Is DTM heat resistant?
Direct-To-Metal (DTM) paints can have some degree of heat resistance, but the level of resistance depends on the specific formulation of the paint.
Some DTM paints may have a dry heat resistance of up to 200°F (93°C), as seen in the Rust-Oleum 3800 System DTM Acrylic Enamel and Sherwin-Williams Direct-To-Metal Alkyd Enamel Semi-Gloss.
However, it’s important to check the specific product data sheet for the DTM paint you are using to find the exact heat resistance level.
Conclusion
As a homeowner or DIYer, you might find DTM paint to be a game-changing solution for your projects.
Its ability to adhere directly to metal surfaces without the need for a primer simplifies your painting process, saving you valuable time and effort.
This paint not only protects your metal structures against corrosion, rust, and environmental damage, but also enhances their lifespan.
Whether you’re working on interior or exterior projects, DTM paint’s versatility has got you covered. It’s perfect for a range of metal surfaces in your home, such as garden furniture, gates, or railings.
With proper surface preparation and following the recommended application methods, you can achieve professional-grade results.
