AAMA updates paint specifications to -17

AAMA-proud memberThe American Architectural Manufacturers Association (AAMA) regularly reviews and updates its specification documents, including for painted coatings. The association’s Aluminum Material Council’s Finishes Committee has adjusted AAMA 2603, 2604 and 2605. The most current versions are denoted as 2603-17A, 2604-17A and 2605-17A.

What’s changed?

In the updated AAMA specifications, the procedure rating the adhesion of coatings to different substrates (via tape test) has been removed. Those standards are still required to meet AAMA’s guidelines, but now Section 8.4 Peel Adhesion refers the reader to ASTM D3359 to find the details on tape testing. These AAMA specifications also reference ASTM D3359-17 for the new requirements for tapes used in adhesion testing.

Section 8.4.1 now clarifies that all tests shall be performed in the sequence they appear in the document. Connected to this, the order of testing has been changed in the specifications. References to subsections of 8.4 also have been updated in Section 5.5.

What’s remains the same?

As a member of AAMA, Linetec stays up to date on these stringent industry standards and documents. We are committed to ensuring our customers’ finishing specifications are met on every project.

For a quick refresher, here’s what to remember about AAMA 2603, 2604 and 2605:

AAMA 2603 – typical for interior specifications

Required to show only “slight” fade and chalking after one year, AAMA 2603 has no specifications for gloss retention and erosion resistance. Baked enamel (acrylic/polyester) paints should meet AAMA 2603. These painted finishes are less expensive than fluoropolymer resin-based coatings, but have poor resistance to color fading and chalking. Baked enamel coatings are harder than fluoropolymer and can be used for interior application where color retention is not required.

AAMA 2604 – an “intermediate” specification

AAMA 2604 specifications are more demanding. If a finish qualifies, then five years after its application the color must have faded no more than 5 Delta E, the chalking no greater than 8, the finish still retain 30% of its gloss and no more than 10% of it has eroded. This finish will provide good color and gloss retention. It also will provide good hardness and abrasion resistance. Painted finishes meeting this specification typically are a 50% fluoropolymer resin-based coatings and are commonly applied on aluminum storefront framing, entrances or other high-traffic areas.

AAMA 2605 – the specification for high-performance exteriors

Ten years after it has been applied, an AAMA 2605 paint will have faded no more than 5 Delta E, the chalking will be no higher than 8, 50% of its gloss will still be retained and only 10% of the film will have eroded. These finishes exhibit outstanding resistance to humidity, color change, chalk, gloss loss and chemicals. Painted finishes meeting this specification typically are a 70% fluoropolymer resin-based coatings and are commonly applied on aluminum framing and systems for monumental architectural projects.

For personalized assistance in selecting and specifying the right coating for your aluminum building products, please contact Linetec’s regional sales managers , email sales@linetec.com or call 888-717-1472.

To download the latest version of these, or any, AAMA documents, visit the AAMA Publication Store

What are common paint defects? How do you minimize them?

ILRegatta_MagellanSelecting the proper architectural paint for a project’s architectural aluminum products can ensure a visually pleasing result for years to come. Even when the correct painted coating is chosen, other factors can cause unforeseen defects to the aluminum product’s surface. Here are some common flaws that may occur, and how to correct or avoid them.

Pretreat the Metal, Dry Thoroughly

The condition of the surface to be coated plays a big role in the final product. The presence of oil, grease or other contaminants can cause adhesion failure in the paint. This could result in the topcoat peeling or flaking off. The rolling process of tubes and extrusions also can leave such a residue. For architectural finishes applied at a paint facility, baking of the paint after application is required, any reside not removed prior to painting, may run, or leach out, from beneath the coating, damaging both the paint and metal.

Your finishing applicator can avoid these flaws by pretreating the metal before paint ever touches it. Using a combination of high-power water rinses, high-temperature acid clean, etch and desmut and a chromium phosphate coating will remove most contaminants and increase the corrosion-resistance of the aluminum. A thorough drying process afterward will ensure that any remaining moisture is evaporated and that the finishers have an ideal surface on which to work.

Know Your Oil

Non-water soluble oils can lead to “fisheye” problems. Fisheye is a defect where circular depressions or “craters” appears in the finish. Most pretreatment systems are not equipped to remove these oils in advance, so if you suspect them to be present on your surface, be sure to discuss this with your finisher.

Watch for Corrosion

If the metal was stored outside before painting, it may suffer from corrosion in spots, which will stain in areas after being finished. Corrosion can be minimized or removed entirely by sanding the affected areas of the metal prior to finishing.

spray application4Apply with Care and Control

The process of paint application also can cause defects to appear later. Blisters or “pops” can appear beneath the surface of the finish after the curing process is complete, if there wasn’t enough flash off time before baking. Inconsistent coloring can occur in the paint if its application was inconsistent or the thickness of the finish varies across the surface. This will result in a coat that has color variation throughout, particularly if viewed from different angles.

These flaws can be avoided by quality-controlled, standard operating procedures for paint application on the part of the finishers. By applying the coating consistently throughout the process, the finishers can ensure less variation in the end product. A combination of automated spray equipment and painting specialists, helps to ensures an even, gradual coating application to prevent film build-up.

Send a Sample

If you are still concerned about the opportunity for defects in your architectural paint, consider sending a sample sheet of the metal that will be used to your finisher, as a mock-up, in advance. By applying the exact process that would be use for your actual project, any potential flaws can be identified and corrected in advance.

ArchResourceImage-arch resource center

Learn more about Linetec’s quality control and paint finishing services by clicking here . For personalized assistance in selecting the right coating for your aluminum building products, please contact Linetec’s regional sales managers , email sales@linetec.com or call  888-717-1472

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Building Enclosure features “Preventing coating failures”

Helping ensure the best finish for architectural aluminum products, Linetec’s Tammy Schroeder recently authored “Preventing coating failures.” Published in the July issue of Building Enclosure magazine, the article addresses the benefits and cautions of selecting paint and anodize finishes.

5-webWith proper consideration and application, finished architectural aluminum will retain its intended look and long life with minimal maintenance. A durable finish helps provide the desired performance in the harshest environments, including the highly corrosive seacoast. These qualities reduce the need to replace materials and components, conserve resources, optimize labor and save money.

Click here to read the online article.

Need help selecting the right coating for your project? Please contact us for personalized service.

5 Things to Know About On-Site Finishing Repair and Restoration

Regardless of its durability, no architectural finish is completely maintenance-free. Periodic cleaning is needed and, in such cases, on-site repair and restoration may be necessary. Here are five things to keep in mind when looking into on-site finishing services:

  1. Start at the source   Whether it is graffiti removal, premature paint chalking and fading, or an anodized surface needing to be refinished, begin by talking to the original finisher to see if they can correct the issue with their on-site team. If this isn’t a practical option or they don’t offer field repairs, please contact us to discuss a plan for restoring your finish to its intended appearance
  2. USCourthouse-RightNewlyPainted-webGo with the pros  For any large refinishing project, consult a professional service. On-site restoration and repair of sizeable architectural projects require specialized equipment and knowledgeable professionals. As projects like these typically are performed on occupied buildings, an experienced partner also can help minimize disruptions with appropriate scheduling and communication.
  3. MadisonCourthouse-fieldrepaint3-webPerformance counts  Ask if the coatings being applied during restoration and repair meet the American Architectural Manufacturers Association (AAMA) specifications of the original finish application. One solution may be a PVDF resin-based air-dry coating that is field-applied by a qualified, professional finisher. Developed to meet green building criteria, these tough properties of these coatings resist marring and abrasion, and require little maintenance.
  4. Take care with touch-up  For minor scratches and blemishes, some applicators may supply a limited amount of touch-up paint. These are fairly easy to apply, but remember that they are only intended to cover a small area. It does not have the adhesion or durability of factory-applied coating, and will deteriorate at a faster rate. For best results, follow all instructions that come with touch-up paint and use it very sparingly. Also, when applying touch-up, use extreme caution as excessive use may void the original finisher’s warranty.
  5. Know your warranty  On-site project warranties vary greatly depending on the project and situation. If the issue being repaired is an applicator or manufacturer issue, the warranty most often will parallel the manufacturer’s factory warranty. For field repair and restoration work unrelated to a factory-applied issue, warranty options may be applicable depending on the base metal condition, base finish condition, site location or type of damage. Read carefully to understand the terms and timeline.

Learn more about Linetec’s on-site repair and restoration services by clicking here. For personalized assistance or to request a site visit, please contact Linetec’s field service manager, Dale Robinson, by emailing fieldservice@linetec.com or calling 888-717-1472.

Architectural Paint Data Sheet

Process  .  Warranty  .  AAMA Specifications  .  Guide Spec

Architectural-Paint-Data-Sheet-1Download complete data sheet

High-performance fluoropolymer resin-based coatings may be defined as a thin layer of plastic film containing resin, binder and pigments that is applied to the surface of an object to provide protection and a decorative organic coating. The exact composition of a particular paint coating is often complex and proprietary.

Fluoropolymer resin-based coatings provide protection against… read more

High-Performance Architectural Paint Process

Paint systems are designed to be applied over clean metal that has been properly pretreated.

Without a proper pretreatment, delamination will likely happen within the first year of installation. To prevent, and warranty against, this type of failure a chrome-type pretreatment is recommended.    read more

ArchResourceImage-LinkedInStrengths of High-Performance Paint

  • Color Retention (UV resistance)
  • Salt-spray resistance
  • Vast array of color choices
  • Paint protects and maintains the structural integrity of the aluminum
  • Field touch-up / repainting capabilities
  • Small-batch and custom color capabilities – fast and cost effective

Paint Warranty

Projects painted by Linetec, utilizing liquid PVDF resin-based coatings, are warranted by the strength of both Linetec and the paint manufacturer. Linetec’s documented testing allows us to offer warranties of 10 years, on high-performance (AAMA 2605) coatings, with confidence that your product will perform as intended.

In some cases, with prior approval and a minimal up-charge, Linetec can offer an extended warranty up to 20 years on AAMA 2605 coatings. read more

AAMA Specifications

In order to ensure the paint performance expected for an architectural / commercial application, AAMA 2605 specification should be referenced along with the paint color.

Beyond the stringent standards and regulations, Linetec offers a downloadable guide spec with specifiable differences that contribute to a project’s long life, durability and sustainability.   read more

Damaged_Anodize-McDonalds door-brickwashCleaning and Maintaining your Aluminum Finish Guide

This paper discusses the recommended care of painted and anodized finishes on architectural metal and examines three levels of concern: care and cleaning, minor repairs, and more complex refinishing.             read more

How long will my paint’s color last?

PRESTON-HYUNDAI-1---Preston-MD=webFrom the moment painted coating is applied to a surface, it begins to degrade from exposure to the elements. Over time, the difference between a coating’s original and current color becomes more pronounced. Selecting a coating designed for the environment where the painted aluminum product is installed, and taking steps to protect it, will help ensure color that lasts as long as possible.

When discussing how long a painted coating’s color will last, we usually refer to “fade.” Fading occurs from the oxidizing or leaching of pigment from the paint, causing its color to alter from its original application. Intense UV radiation (i.e. daylight) also causes fading. All paint color will fade eventually, but the degree of fade can be reduced with knowledgeable selection and basic maintenance.

Specifying for Fade Resistance

The American Architectural Manufacturers Association’s industry-leading performance standards – AAMA 2603, 2604 and 2605 – for architectural painted coatings specify color retention in terms of Delta-E (dE). A dE is a unit of measurement between two colors where 1.0 is the smallest difference a human eye can see. As time passes and a finish drifts from its original hue, its dE increases.

  • AAMA 2603 requires that a paint show only “slight” fade after one year. This pertains to baked enamel coatings typically used for interior application where color retention is not a large concern.
  • AAMA 2604 requires that a painted coating must not fade more than 5 dE over five years. This pertains to 50% PVDF resin-based coatings and typically is used for storefronts, doors or other high-traffic areas.
  • AAMA 2605 requires that a painted coating must not fade more than 5 dE over 10 years. This pertains to 70% PVDF resin-based coatings and typically is used for curtainwall and window wall on monumental architectural projects.

Formulating for Vibrant, Durability

The composition of a paint’s pigments will influence how quickly it fades. Inorganic pigments fade more slowly than organic pigments. Some brighter, more vibrant colors – such as bright red – traditionally use organic pigments to achieve their desired hue. The organic pigment’s greater susceptibility to fading can be combatted by applying a clear-coat over the topcoat of paint. This helps minimize UV exposure to the more vulnerable pigment.

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Image shows fade comparison of Kynar 500 (AAMA 2605) to Polyester (AAMA 2603)

Cleaning for Longevity

Once applied, even a durable finish will require occasional cleaning to slow its fading. Avoid cleaning a coated surface with strong acid or alkali cleaners. Instead selecting a mild soap solution for washing your finished surfaces.

Learn more about color retention and Linetec’s paint finishing services by clicking here . For personalized assistance in selecting the right coating for your aluminum building products, please contact Linetec’s regional sales managers , email sales@linetec.com or call 888-717-1472.

 

Choosing architectural painted coatings – 70% PVDF, 50% PVDF, Baked Enamel – What’s the difference?

man hands on window frameWhen selecting high-performance architectural coatings for aluminum building products including window, curtainwall, storefront, entrance and panel systems – there are three main choices for durable painted finishes: 70% PVDF, 50% PVDF and baked enamel.

70% PVDF resin-based coatings offer the ultimate protection in building performance.

No other coating system can withstand the rigors of nature and time like those based on the polyvinylidene fluoride (PVDF) resin, such as Kynar 500® or Hylar 5000®. The resin system determines the properties and performance of the paint. In a 70% PVDF coating, 70% of the resin component is PVDF.

Ideal for high-performance exterior-facing building products, 70% PVDF resin-based coatings meet the industry’s stringent requirements set by the American Architectural Manufacturers Association – AAMA 2605. They exhibit outstanding resistance to humidity, color change, chalk, gloss loss and chemicals to ensure a long lasting, durable finish.

Linetec-paint-chips-(9)-web-smallerAmong the most popular and reliable 70% PVDF resin-based coating families are:

  • AkzoNobel TRINAR®
  • PPG DURANAR®
  • Valspar Fluropon®
  • Sherwin-Williams SHER-NAR®

50% PVDF resin-based coatings offer an intermediate level of exterior protection.

Architectural painted finishes with 50% PVDF resin-based coatings that meet the AAMA 2604 specification provide good color and gloss retention in exterior applications. These coatings also offer good hardness and abrasion resistance, making it a frequent choice for storefront, doors, or other high-traffic areas.

Among the most popular and reliable 50% PVDF resin-based coatings are:

  • AkzoNobel ALUM*A*STAR® and ALUM*A*Escent®
  • PPG ACRYNAR®
  • Valspar Acroflur®

Baked enamel coatings offer a lower level of protection, typically for interior metal products.
Baked enamel finishes are acrylic/polyester coatings. Meeting the AAMA 2603 specification, the coatings are a one-coat system with poor resistance to color fading and chalking. For these reasons, they typically are used for interior applications where color retention, chalk, fade and weatherability is not required.

Among the most popular and reliable baked enamel coatings are:

  • AkzoNobel ACRA-BOND® ULTRA
  • PPG DURACRON®
  • Valspar Flurocryl

Learn more about architectural paint types by clicking here. For personalized assistance in selecting the best high-performance architectural coating for your aluminum building products, please contact Linetec’s regional sales managers, email sales@linetec.com or call 888-717-1472.