Problem Solving Forum (85)


What are the performance distinctions among various types of intumescent coatings (for example, water-based, solvent based, epoxies, methacrylates, etc.)?


Which factors are most important in selecting coatings for new concrete?


What are the options for shop-applied systems (surface preparation and coating type) to protect the interiors and exteriors of new saltwater storage tanks and associated steelwork that will be exposed to seawater, and that will allow for easy touchup and maintenance once the structures are erected?


What is the best method for removing production machine oils soaked deeply into a concrete floor before applying a non-skid coating?


When applying a 100% solids, fast-curing polyurea coating on concrete, what is the best method for verifying that the proper thickness has been applied?


What is the best way to remove thick-film elastomers from floors and ship decks?


Where would you use epoxy and cementitious intumescent coatings?


What type of material should I use to achieve bright, bold colors on a concrete floor with heavy foot traffic?


Can you provide recommendations on ways to make sure an acid stain can be successfully applied to an existing horizontal concrete surface? I understand that residues such as coatings, curing agents, waxes, or other materials will interfere with the stain’s reaction with the concrete, but can I find out what the substances are so I know how to remove them?


What type of antifouling or foul-release coating will provide the greatest protection in warm tropical waters, and for how long?


What are the performance distinctions among various types of intumescent coatings (for example, water-based, solvent-based, epoxies and methacrylates)?


How do I prepare an oil-stained, bare concrete floor for coating?


Which factors are most important in selecting coatings for new concrete?


What components of an onshore shale gas drilling rig require coating protection, and what properties must the coatings have?


What is the best way to protect an exposed concrete foundation?


How do you determine the best type of paint to use when repainting a block or concrete building?


How is it possible to determine if concrete is sound enough to receive a thick-film coating?


How do I prepare an oil-stained, bare concrete floor for coating?


When applying a 100% solids, fast-curing polyurea coating on concrete, what is the best method for verifying that the proper thickness has been applied?


I've seen claims of extreme durability for a new concrete floor coating material exposed to heavy foot traffic. Is there a quick test to determine the validity of these claims?


What are the performance distinctions among various types of intumescent coatings? More specifically, the differences between water-based, solvent-based, epoxies and methacrylates?


What are the performance distinctions among various types of intumescent coatings (for example, water-based, solvent-based, epoxies and methacrylates)?


What is the difference between concrete "coatings" and "toppings"?


What type of material should I use to achieve bright, bold colors that will last on a concrete floor with heavy foot traffic?


What would be a reasonable service life for a two-coat, zinc-rich epoxy/epoxy mastic system, about 200-250 microns, in a marine environment? What evidence is there from the field?


What kinds and sources of data are available to support the use of antimicrobial agents in coatings for hospital substrates?


When coating an aged concrete floor, how should one determine the correct sequence of surface preparation among the options of pressure washing and grinding or other concrete removal and roughening methods?


What type of antifouling or foul-release coating will provide the greatest protection in warm tropical waters, and for how long?


When coating an aged concrete floor, how should one determine the correct sequence of surface preparation among the options of pressure washing and grinding or other concrete removal and roughening methods?


How can I determine when concrete has cured sufficiently to be coated, besides waiting the 28 days typically specified?


What are the pros and cons of using shotblasting to remove a coating system from a concrete floor?


How do you prepare an oil-stained, bare concrete floor for coating?


Where would you use epoxy and cementitious intumescent coatings?


In what type of environment is the use of a vapor-impermeable air/moisture barrier recommended? Are there guidelines or standards to help determine this?


Is there a quick way to determine the validity of a claim of “extreme durability” for a new concrete floor coating material exposed to heavy foot traffic?


What can be used in states that will not allow the use of MEK for IOZ testing per ASTM D4752?


What type of material should I use to achieve bright, bold colors on a concrete floor that gets heavy foot traffic?


What is a self-leveling floor coating, and are there any published standards such coatings must meet in terms of smoothness or other visual properties?


We’re converting a grocery store into a motorcycle dealership. Should we polish the concrete floor or coat it? The concrete seems in fair shape, from what we can see under the dried mastic where the old vinyl tiles have been removed.


On guardrails on a marine wharf, grating panels consisting of mild steel bars about 1/8-inch by 1-inch on a 2-inch-square grid were painted with a three-coat zinc/epoxy/urethane system. Inspectors are finding numerous pinholes in the finish coat along the inside corners of the grating where the 1-inch-thick bars meet at a 90-degree angle. These pinholes were not noticed in the zinc or epoxy coats, but the final coat's visual inspection is more detailed. What is the likely cause of the pinholing, and what could be done to prevent it on future applications? Also, what should the disposition of the parts with pinholes be, as in, repair, accept as is, reblast and recoat, or an alternative?


Is a sealer coat always required for coating systems applied to concrete surfaces that will be exposed to marine environments?


What are the most effective procedures for protecting steel and adjacent concrete together?


In preparing for coating, what is the best way to treat a steel surface that has been attacked by microbiologically influenced corrosion (MIC)?


Which factors are most important in selecting coatings for new concrete?


What tests should be run to determine if an existing concrete bridge pier needs rehabilitation or repair before cleaning and coating?


RH probes are commonly used in concrete floors to determine moisture content. Can they be used in CMU walls or pre-cast walls?


What is the optimal moisture content for masonry before painting can begin?


What are the performance distinctions among various types of intumescent coatings (for example, water-based, solvent-based, epoxies and methacrylates)?


When applying a 100% solids, fast-curing polyurea coating on concrete, what is the best method for verifying that the proper thickness has been applied?


Which factors are most important in selecting coatings for new concrete?


What is an acceptable level of moisture in concrete walls before painting with an acrylic system, and how should the moisture level be measured?


Can lightweight block (CMU) be successfully coated to prevent water intrusion, or is it best to build with standard weight?


How do concrete admixtures such as hardeners and anti-dust compounds affect coating adhesion? What can be done to minimize negative effects?


What is the best way to assure compliance with specified dry film coating thickness requirements on vertical concrete?


What are the pros and cons of using shotblasting to remove a coating system from a concrete floor?


I’ve seen claims of extreme durability for a new concrete floor coating material exposed to heavy foot traffic. Is there a quick test to determine the validity of these claims?


What are the pros and cons of using shotblasting to remove a coating system from a concrete floor?


How, besides grinding, can one remove large areas of silicone coating from a ship’s hull to replace the silicone with an epoxy mastic?


When animal fat in slaughterhouses penetrates concrete surfaces, how do you identify and remove the contamination before coating the concrete?


What is the best way to remove thick-film elastomers from floors and ship decks?


What type of material should I use to achieve bright, bold colors on a concrete floor that gets heavy foot traffic?


What is the best method of testing for moisture content in concrete masonry unit (CMU) walls before application of coatings?


What’s the best way to determine if a cementitious-based mortar used to repair exterior concrete is ready to be coated?


What are the pros and cons of acid-staining a concrete floor?


We’re converting a grocery store to a motorcycle dealership. Should we polish the concrete floor or coat it? The concrete seems in fair shape, from what we can see under the dried mastic where the old vinyl tiles have been removed.


I need to coat a bare concrete warehouse floor that has visible oil stains. What are my options for cleaning the concrete before coating it?


What is the difference between a damp-surface tolerant and a wet-surface tolerant paint? How can we determine when a surface is damp or wet?


What is the best way to protect an exposed concrete foundation?


How do I prepare an oil-stained, bare concrete floor for coating?


Zinc metalizing has been applied to concrete surfaces to provide cathodic protection to rebar in the concrete. What are the problems, if any, with applying zinc metalizing to concrete, and what is the best approach to addressing them?


What components of an onshore shale gas drilling rig require coating protection, and what properties must the coatings have?


What type of antifouling or foul-release coating will provide the greatest protection in warm tropical waters, and for how long?


How do you prepare an oil-stained, bare concrete floor for coating?


Why would a pull-off adhesion test give a high value (no failure) for a solventless epoxy that later showed poor adhesion in service?


Where would you use epoxy and cementitious intumescent coatings?


What are the limitations of rust-encapsulating coatings?


I am experiencing problems with a paint system on some vessels we built. The system is an ethyl silicate zinc primer, glass flake epoxy tie-coat and aliphatic poly top coat. The project is constructed from A516 boiler plate 1/4 in thick. Blasted to SP10 with 2.5 mil profile. Painting is being done inside a paint booth where ambient conditions clearly meet the specification. The coatings are exhibiting symptoms of solvent popping in a specific area on the exterior of the vessel. The problem only manifests itself over the back side of a weld that is on the inside of the vessel. We have made numerous adjustments to the system as well as the process to try to solve the issue. Nothing is helping. The manufactures reps are scratching their heads, and I am pulling my hair out. Any input would be welcome.


How do you determine the best type of paint to use when repainting a block or concrete building?


What are the performance distinctions among various types of intumescent coatings (for example, water-based, solvent based, epoxies, methacrylates, etc.)?


Which factors are most important in selecting coatings for new concrete?


What is the best method for removing production machine oils soaked deeply into a concrete floor before applying a non-skid coating?


When applying a 100% solids, fast-curing polyurea coating on concrete, what is the best method for verifying that the proper thickness has been applied?


What are the options for shop-applied systems (surface preparation and coating type) to protect the interiors and exteriors of new saltwater storage tanks and associated steelwork that will be exposed to seawater, and that will allow for easy touchup and maintenance once the structures are erected?


How is it possible to determine if concrete is sound enough to receive a thick-film coating?


How do I determine when a cementitious-based mortar used to repair exterior concrete is ready to be coated?


 
 
   

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