How-To Prepare Roll-Up Doors with Peeling Issues
A Guide to Prepping Roll-Up Doors with Wide-Spread Peeling Issues
Published on
October 7, 2024 at 2:57:15 PM PDT October 7, 2024 at 2:57:15 PM PDTth, October 7, 2024 at 2:57:15 PM PDT
10/07/2024 - In Development Article: Pending Review
Preparation
- Clean and remove any chalk using Zap-It! Chalk & Grime Buster, then remove all loose and peeling paint using a power washer, scrubbing, and/or scraping as needed.
- Thoroughly sand and/or wire brush the entire door, focusing on smoothing and feathering the edges of the remaining paint that could not be removed during power washing. This step will also roughen the surface and improve adhesion to the original SMP coil coating exposed after the peeling paint is removed. It is extremely important that all curling and lifting edges of the failed paint are removed and sanded smooth, and that all slick, glossy areas are abraded to ensure good adhesion. Remove any dust.
- Spot prime all areas where raw ferrous metal is exposed with a corrosion-inhibiting metal primer as soon as possible.
- Spot prime all edges where loose or peeling paint was removed. If paint peels during priming, re-detail those areas.
Chem-Bake
- Evaluate the door after drying. If the existing coating is the original SMP or urethane-based paint over SMP that is well-adhered and likely to withstand the bonding power of a urethane paint, apply Chem-Bake according to the manufacturer’s guidelines.
- Inspect the door for any issues and address them as needed.
Endura-Crylic
- If the existing paint cannot provide an adequate substrate for Chem-Bake, or if the older coating is acrylic and has not been completely removed, Endura-Crylic may be the better option. While it doesn’t offer the same life expectancy or durability as Chem-Bake, it is a premium acrylic with good fade resistance, greater flexibility, and doesn’t pull on the underlying paint as much as Chem-Bake as it cures.
- Priming with Bond-All is required when painting over a previous acrylic coating and is recommended for doors with widespread peeling. It will further stabilize the existing coating, reduce the risk of water intrusion, and improve the adhesion of the new Endura-Crylic coating.
- Apply one coat of Bond-All Bonding Primer. If any edges of the old coating peel during primer application, remove the loose paint, and apply the primer by brush to seal the edges.
- Finally, apply Endura-Crylic per the manufacturer’s specifications. After application, inspect the door and repair any additional areas exhibiting peeling paint or curled edges following the earlier steps.
- At the conclusion of the project, there should be no visible remnants of the old peeling paint. The applied Endura-Crylic coating should form a monolithic, uniform layer with no breaks, gaps, curling edges, or areas where water can seep underneath the coating.
Chem-Bake® One-Step: Overview
Chem-Bake® One-Step is the preferred coating solution for self-storage roll-up doors when applied to sound substrates, free from peeling or adhesion failure. It provides a superior solvent, chemical, moisture, mar, and fade-resistant finish that most closely resembles the glossy, fade-resistant, and durable qualities of the original SMP coating. Chem-Bake® is based on automotive paint technology and uses a 'chemical baking' process that results in a highly cross-linked and bonded coating when applied to properly prepared surfaces. Not for use on cars.If peeling or other substrate issues are present and they can be addressed to create a sturdy foundation for Chem-Bake®, it remains the preferred solution for roll-up doors.
Applying Chem-Bake® to inadequately prepared surfaces or surfaces with existing integrity issues may accelerate the peeling process due to its powerful bonding action.
Product Documentation
Endura-Crylic: Overview
Endura-Crylic is a single-component, water-based acrylic urethane with low VOC and HAP. This coating is designed for use on primed or previously painted substrates.Endura-Crylic is ideal when it is determined that the existing substrate has serious failure issues that cannot be sufficiently addressed to allow the use of Chem-Bake.
The existing surfaces must still be cleaned, and any peeling, cracking, or other failure issues must be addressed as thoroughly as possible. In some cases, a coating of Bond-All Bonding Primer may further stabilize the underlying coating and improve adhesion of the Endura-Crylic. This may result in a 'best-that-can-be-achieved' finish, which means it may not completely hide underlying problems or stop existing failure issues, but it could extend the useful life of the door for a few more cycles. Endura-Crylic does not offer the bonding strength and durability of Chem-Bake.
Product Documentation
Bond-All Bonding Primer: Overview
Bond-All is a high-performance, multi-surface, water-based bonding primer. It provides outstanding adhesion to properly prepared interior and exterior metal and previously painted metal surfaces. It also offers very good solvent and chemical resistance.Glossy or smooth, hard slick surfaces should be dulled and/or abraded using silicon carbide sandpaper, Scotch-Brite®, or other abrasive mediums to de-gloss and create a surface profile for maximum adhesion. Bare or rusting ferrous metal requires a rust-inhibiting iron primer to be applied first. As previously detailed, a cross-hatch adhesion test should have been performed to determine the stability of the substrate—no new coating will 'glue down' a failing coating. Bond-All will improve the bonding of Endura-Crylic, especially over previous urethane finishes.
Product Documentation
Self-Storage Roll-Up Doors: A Guide for Painters
This guide offers professional painters a comprehensive approach to evaluating, preparing, and painting roll-up doors using the Chem-Bake® system. It addresses the challenges of SMP coil-coated surfaces, provides tips on surface preparation, adhesion testing, and correct application techniques for achieving a durable, smooth finish on self-storage roll-up doors.
Part Failure Part 2: Other Causes, Testing & Wrap-Up
There are a lot of reasons why paint fails. We'll wrap up a few other causes here and then cover solutions and other topics in subsequent articles. Aged Paint: When paint ages past its life expectancy, it becomes brittle and prone to failure. Recoating over such a surface increases the risk of peeling, cracking, or flaking, as the old paint may not adhere well. Proper preparation, including cleaning, sanding, and priming, is essential to ensure the new coating bonds effectively and lasts longer. We also touch on what can be done with a peeling paint job and wrap up with issues of worksmanship.ID#PF0001
Paint Failure Part 1: Diagnosing the Root Causes
Paint failures due to a variety of preventable issues can lead to substantial material and labor costs, and in some cases replacement of roll-up doors. Understanding why common problems like peeling, chalking, fading, cracking, and blistering occur is crucial for facility operators and painting contractors. By identifying the root causes of these issues, such as improper surface preparation, inadequate application techniques, or environmental factors, these paint failures can be avoided. For paint contractors implementing best practices can yield better results, and help avoid problems that can cost you both money and reputation. A variety of resources are provided to help diagnose and avoid common paint failure situations. These resources include guides, frequently asked questions, tips with images to diagnose the cause of a particular failure, and recommendations. ID#PF0001
Additional Reading
Self-Storage Roll-Up Doors: A Guide for Painters
This guide offers professional painters a comprehensive approach to evaluating, preparing, and painting roll-up doors using the Chem-Bake® system. It addresses the challenges of SMP coil-coated surfaces, provides tips on surface preparation, adhesion testing, and correct application techniques for achieving a durable, smooth finish on self-storage roll-up doors.
Part Failure Part 2: Other Causes, Testing & Wrap-Up
There are a lot of reasons why paint fails. We'll wrap up a few other causes here and then cover solutions and other topics in subsequent articles. Aged Paint: When paint ages past its life expectancy, it becomes brittle and prone to failure. Recoating over such a surface increases the risk of peeling, cracking, or flaking, as the old paint may not adhere well. Proper preparation, including cleaning, sanding, and priming, is essential to ensure the new coating bonds effectively and lasts longer. We also touch on what can be done with a peeling paint job and wrap up with issues of worksmanship.ID#PF0001
Paint Failure Part 1: Diagnosing the Root Causes
Paint failures due to a variety of preventable issues can lead to substantial material and labor costs, and in some cases replacement of roll-up doors. Understanding why common problems like peeling, chalking, fading, cracking, and blistering occur is crucial for facility operators and painting contractors. By identifying the root causes of these issues, such as improper surface preparation, inadequate application techniques, or environmental factors, these paint failures can be avoided. For paint contractors implementing best practices can yield better results, and help avoid problems that can cost you both money and reputation. A variety of resources are provided to help diagnose and avoid common paint failure situations. These resources include guides, frequently asked questions, tips with images to diagnose the cause of a particular failure, and recommendations. ID#PF0001
Disclaimer: The information provided in the Self-Storage Learning Center is for general informational purposes only. While we strive for accuracy, All From 1 Supply makes no guarantees regarding the completeness or reliability of the information. Use of this content is at your own discretion, and we encourage independent verification before making decisions based on the material.
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