What does DTM stand for?
Direct to metal paint, also called DTM paint, is used for a variety of interior and exterior surfaces. Paints labeled for DTM usage are available at most hardware stores and some automotive supply stores. DTM paint is usually made with acrylic resin, and it is formulated for use on unprimed metal.
What is a DTM coating?
Indeed, DTM coatings allow simplification of the coating system by replacing traditional primer/topcoat systems with one or more coats of a single coating that performs all of the functions of both primer and topcoat.
What is direct to metal paint?
DTM paint is just as its name implies, applied directly to metal. A Direct to Metal paint does not require a primer and may be applied with minimal surface prep. The DTM paint acts both as a primer and top coat in one. It’s best to speak to your professional painter to determine when to use Direct to Metal paint.
What is Heuer DTM coating technology?
This attribute enables customers to formulate a DTM coating layer that is heat-resistant up to 550–600 C and 99% VOC-free and offers outstanding UV- and corrosion-resistance, according to Heuer. “The new hardener technology combined with our silicone binders is able to create a DTM formulation on critical substrates like cold rolled steel.
Why is surface preparation reduced?
As a two-in-one coating, surface preparation is significantly reduced because applicators get to skip the primer application step. However, for the full effect of DTM and an aesthetically pleasing result, it is important to make sure that the substrate receiving the coating is prepped correctly.
What is a DTM coating?
DTM is very well characterized by its name. This type of coating is to be applied directly to a metal substrate, giving the painted structure a nice architecturally pleasing look and protection from weathering forces. Further, this coating type requires minimal surface preparation and acts as both a primer and a topcoat.
How to remove rust from paint?
A wire brush can be used to remove any rust or flaking paint from the substrate’s surface. The remaining dirt or foreign material can be removed simply by wiping it down with a damp cloth. Meanwhile, acetone can be used to remove substances like grease or oil.
What is waterborne acrylic DTM?
Waterborne Acrylic DTM: This type of DTM contains low VOCs making it environmentally friendly and non-flammable. It applies to both interior and exterior environments.
What pressure should I use for Tizbi sprayer?
Tizbi Technologies recommends using a 0.015” sprayer tip and adjusting the pressure to 1500 psi. It is important to keep track of the recommended application rate and thickness of the used product.
What factors affect drying time?
Drying time can be influenced by factors like coat thickness, temperature, humidity, and ventilation. When finished, tools and other materials can be easily cleaned with water.
Does DTM paint require primer?
To elaborate on a characteristic of DTM paint that gives the coating its name, this type of paint does not require a primer. DTM is formulated to be applied with minimal surface preparation and acts as a primer/topcoat combination.
What are the benefits of DTM coating?
These functions include the adhesion and corrosion resistance provided by a primer coupled with the weathering protection and cosmetic appearance expected of a topcoat.
What is DTM coating?
Eliminating the primer coating of metal surfaces by using Direct-to-Metal (DTM) coatings is an excellent way to simplify the painting process. Applying DTM coatings can simplify, accelerate and economize the finishing process in the following ways.
How fast is DTM coatings growing?
DTM coatings are expected to grow at 1.5 to 2.5 times the rate of other market segments.
What is substrate wetting?
Substrate wetting is the foundation on which all properties are built and is critically important for DTM coatings. Wetting is a function of many formulation components but is largely dependent on the binder system.
What additives can improve substrate wetting?
Solvents and additives, such as surfactants can improve substrate wetting, but the backbone polymer is the primary driver of proper wetting. Combinations of binder chemistries are often utilized in DTM coatings to achieve this property.
What is the most complex coating process?
Arguably the most complex coating process is OEM automotive finishing. The automotive painting uses the majority of the energy consumed in vehicle manufacturing. Industrial and construction finishing doesn’t involve the complexity of automotive manufacturing, but the advantages of process simplification still apply.
Is alkyd a DTM?
Solvent-borne Alkyds are still the most common ambient curing single package coatings used worldwide. Although this is a mature technology, in regions where regulations allow alkyds can perform well as DTM coatings.
How to remove rust spots from metal?
Scrape off large rust spots with a wire brush. DTM paint helps seal metal surfaces for better rust protection, but existing rust spots need to be removed first.
What is the best paint for DTM?
Painter’s tape. Airless spray gun. Spray guns are best for DTM paint application. "Direct to metal" paint, also called DTM paint, is used for a variety of interior and exterior surfaces. Paints labeled for DTM usage are available at most hardware stores and some automotive supply stores.
How to clean a dirty surface?
Wash the surface with soap, water and a rag. Dirty surfaces don’t accept DTM paint easily.
Is DTM paint better than acrylic paint?
Because you don’t need to worry about primer, using DTM paint is faster than painting with a traditional acrylic paint. For good DTM coverage, however, you still need to do some light prep work and use the proper tools for application. Advertisement.
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What is direct to metal coating?
Direct-To-Metal coatings are commonly used by non-professionals and are regularly used for small jobs where only basic corrosion resistance or basic aesthetic appeal is required. Although surface preparation does not need to be of high quality as with other coating products, the material should still be free of heavy oxide layers and other debris.
What is direct to metal?
What Does Direct-To-Metal Mean? Direct-To-Metal (DTM) is a type of paint or coating used on metal surfaces. Direct-To-Metal coatings, as the name implies, are applied directly onto a metal substrate without the use of a primer beforehand.
Is primer needed for DTM coating?
Since a primer is not necessary for DTM coatings, they are regularly chosen for jobs when surface preparation is not possible or for applications in which high quality is not the primary concern. Advertisement.
What is a DTM coating?
Pro Industrial DTM Acrylic Coating is an interior/exterior, water-based, corrosion resistant acrylic coating for light to moderate industrial use. Designed for new construction or maintenance use and can be used directly over prepared substrates.
What is a high quality coating?
A high-quality coating starts with high-quality ingredients that allow paint to apply more easily, look better and last longer. Learn More
How to contact Sherwin Williams?
To learn more contact your local Sherwin-Williams Sales Rep or Call 800-524-5979.
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What primer should I use for galvanized aluminum?
Galvanized Metal, Aluminum & Other Non Ferrous Metals: Use a MPI #134 certified water based primer for galvanized surfaces, such as BEHR PREMIUM PLUS Exterior Multi-Surface Primer & Sealer No. 436.
What metals use SSPC-SP1?
Galvanized Metal, Aluminum & Other Non Ferrous Metals: Use SSPC-SP1. All oil film on new metal must be removed before it is painted.
How to clean a sanded sandpaper?
Clean by scrubbing the surface with a solvent such as mineral spirits or acetone and remove any residue.
What is required to clean a paint job?
Proper surface preparation is required. All surfaces must be clean, dry, free of rust, dust, dirt, chalk, oil, grease, wax, polish, mold and mildew stains, loose and peeling paint and all other foreign substances. Mildew: Remove mildew stains with a mildew stain removing product.
How to remove rust from metal?
Remove all rust and mill scale using sandpaper, steel wool, abrasive blasting, or other abrading methods to create a profile on the metal’s surface. Remove any residue, and clean the metal by scrubbing the surface with a solvent such as mineral spirits or acetone. Bare metal must be coated the same day it is cleaned.
How many sq ft per gallon of water?
350-400 sq ft per gallon depending on the application method and substrate porosity. It does not include the loss of material from spraying.
What does a member of a symlink do?
Members get exclusive, money-saving offers and special coupons for the products they use most.
What is BASF’s new resin?
BASF in 2020 is introducing two new resin products: solventborne JONCRYL® xDTM and waterborne ACRONAL® PRO 770. “Typically, when formulating with conventional polyols, formulators may add a tin catalyst to reduce dry times, but this tactic often negatively impacts pot-life. When using BASF’s JONCRYL xDTM, the use of a tin catalyst still allows formulators to reduce dry times but does not affect the pot-life —a major benefit in comparison to conventional polyol resins, making application easier and less expensive,” Blankenhorn says. JONCRYL xDTM is a low VOC-capable solventborne polyol specifically designed for DTM application that exhibits superior dry and wet adhesion to multiple metal substrates, performing particularly well on EZG and galvanneal steel, she says. “This new resin also offers reliable corrosion resistance and high gloss retention and hardness, eliminating the need to compromise between technical performance and aesthetic goals, according to Blankenhorn. Meanwhile, “in the current regulatory environment, many in the industry are switching to waterborne coatings and demanding higher corrosion protection performance from waterborne systems,” Hamp observes. BASF’s answer is ACRONAL PRO 770, a water-based resin that can achieve C3 or higher-level protection in a true DTM monocoat system, she says. “By eliminating the need for corrosion inhibitors and active pigments, PRO 770, which offers best-in-class corrosion protection coupled with superior wet and dry adhesion, reduces formulation cost and complexity,” Hamp comments.
What is formulation know-how?
Formulation know-how is an additional component to the creation of high-performing DTM coatings. “Developing new technology in additives and resins creates value for customers and end-users; however, it is critical to formulate these new technologies into real-world products that work day in and day out on a paint line. The best technology in the world will not be successful if it is difficult to apply on a paint line or requires additional capital investment or unique equipment to work,” states Carroll. As an example, Vanheertum points to waterborne 1K acrylic binder technologies, which can be less robust in DTM applications than alkyd- or epoxy-based technologies with formulation optimization using new resins and additives to maximize hydrophobicity and minimize transportation of ions and oxygen through the film. “Achieving this type of performance at the lowest possible VOC without using anti-corrosive pigments requires much more attention from formulators, but also from resin or additive developers,” he remarks. Hamp adds that for waterborne chemistries, formulation has always been critical to ultimate coating performance. “Any new formulation component must be assessed for compatibility with the whole system. To achieve this goal, in the last five years formulators have been increasingly using Electrochemical Impedance Spectroscopy (EIS) to characterize and predict a system’s corrosion protection performance, because this analytical method allows formulators to quantify the benefits of individual formulation components,” she observes.
What are resin chemistries?
Resin chemistries under development are new progressions of existing technologies designed to fill gaps in performance related to durability, lower VOC emissions, and easier-to-use levels in formulations, according to Heuer. There is also a trend to move from 2K to 1K solutions, of course without compromising performance. PPG, Carroll observes, is focused on developing new water-based resin chemistries to accommodate customer needs and specific regional regulations. “The challenge has been application robustness and cost versus traditional solvent-based resins,” he notes. DTM binder technologies have also faced issues with gloss, adhesion, and block and corrosion resistance compared to high-VOC solventborne or multi-coat systems, adds Goodyear. “Recent developments, however, have displaced the idea that performance expectations must be lowered when transitioning to waterborne systems,” she asserts. Avci points to the launch of new waterborne epoxy systems and DTM binders, such as styrene/acrylic-based emulsion polymers and alkyd emulsions, that deliver equal, and sometimes even better, corrosion resistance (longer salt spray hours) and better adhesion to multiple metal substrates. He does say, however, that a good balance of film hardness and low VOC is something that can often be difficult to achieve. “Advances that have happened in the last few years in water-based binders have been closely aligned to new developments in additives, as the compatibility and synergy of these ingredients is what ultimately gives a formulated coating its balance of properties,” Procopio adds. He stresses, too, that the industry is continually working on the next generations of waterborne acrylic DTM binders, looking for new advances in corrosion, adhesion, hardness, and low VOC.
What are the properties of acrylic latex?
Indeed, improved understanding of structure-property relationships has led to the introduction of new acrylic latex products for high-performing DTMs that display an excellent balance of properties, such as corrosion resistance, hardness, metal adhesion, low-VOC, and exterior durability, according to Procopio. Specific advancements in 1K waterborne acrylic DTMs have included more hydrophobic binders that facilitate coatings with greater corrosion resistance and binders with complex latex morphologies, which in turn allow for good hardness properties at low-VOC content, he notes. “These advancements are driven by end-user needs for improvements in these properties. In particular, a need for low-VOC waterborne acrylic DTM finishes below 50 g/L with good hardness (related to properties such as block, tack, dirt pickup resistance) has been expressed by the industry,” he explains. Additionally, waterborne epoxy systems are becoming more in demand because of the durability properties of epoxy resins, according to Avci.
What are the benefits of DTM coatings?
Benefits of DTM coatings that provide the desired level of performance are numerous, from convenience and ease of application to cost savings and enhanced sustainability. For DTM coatings, convenience and ease of application actually address a couple of hurdles that have to be overcome with these types of systems, according to Tom Vanheertum, marketing manager for industrial metal at allnex. “Metal cannot be regarded as one substrate as there are many variations between alloys, pretreatments, or residual chemicals from the production process like galvanization, sandblasting, residual lubricating oil from a cold rolling process, etc. These all have a significant impact on adhesion to the substrate,” he explains. In fact, in most industrial coating applications, DTM coatings are not applied directly to metal substrates, but on some type of pretreatment, adds Andrew Carroll, vice president of industrial coatings, Americas for PPG. “It is critical to understand the pretreatment/coating synergy, the real-world application, and online test results versus a lab environment on controlled panels,” he states.
What is a DTM coating?
Direct-to-metal (DTM) coatings are designed to provide the performance of traditional primer–topcoat systems, but in one coat. As technologies for the development of DTM coatings have advanced and led to more desirable properties during application and in applied films, demand for these coatings has been increasing. As a result, while DTM coatings today still account for a small percentage of the overall metal coatings market, they have become one of the fastest-growing subsegments of this market.
Why are additives important in DTM coatings?
“Using additives, it is absolutely possible to improve corrosion, adhesion and humidity resistance, or to improve the early water resistance as well, ” asserts Juckel.
Despite these misconceptions, modern waterborne technologies provide excellent performance and sustainability to direct-to-metal coating formulations
Waterborne direct-to-metal (DTM) coatings are increasing in popularity thanks to their ease of application, sustainability benefits, and time and cost-saving capabilities, but some formulators still have questions about their performance or implementation.
While some specific applications are best suited for solventborne coatings, waterborne coatings have proven themselves to be an effective and sustainable solution.
Myth 2: Waterborne coatings can redissolve from rain or humidity, decreasing effectiveness
This myth arises from a misunderstanding of how waterborne coatings work. Coating resins aren’t actually dissolved in waterborne coatings – they’re simply polymers that have been dispersed.
“When you create a coating, you have something that’s called film formation,” says Neely.
Myth 3: Waterborne coatings take a very long time to dry
Once again, the key to achieving a faster dry time is in the additives and formulation of the coating.
“There are a few ways we can formulate to improve dry time,” says Neely. “One is making sure the polymer chemistry is appropriate.
Making the switch
As with any changes to formulations, steps must be taken to ensure a smooth and successful transition. Coating formulators need to make sure their supply chain and infrastructure is ready to adapt.