Monthly Archives: January 2015

Commercial Painting – Enamel Paint

commercial painting

Enamel Paints

Enamel alkyd paints are good, all-around paints that dry to a hard gloss.

common characteristics for these popular commercial paints are:

  • Fast drying
  • Flake and chip resistant
  • Resistant to dirt, abrasion and impact
  • Easy to apply

Enamel paints that offer these characteristics arise from the alkyd binders used in these paints. As you may recall from previous blogs, alkyds are derived from alcohols and organic fatty acids. Both paints use medium aliphatic hydrocarbon solvents.  We rely to the Commercial Enamel when conditions are a little more demanding.

Uses and Characteristics

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Commercial Painting & Flooring in Bucks County, Pennsylvania

We were contacted by a dog kennel in Bucks county Pennsylvania in September 2014 to install a new epoxy floor in their kennel.  The current floor was experiencing delamination due to excessive water, urine, and cleaners.


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From what we were told by the owner, the floor had been installed over 10 years ago.  He knew it was an epoxy coatings, but was unsure of the millage or preparation that went into the floor.  Additionally, the owner requested that the walls be painted with a fresh coat of commercial paint.  At our discretion, we selected a solvent based epoxy, because of its superior adhesion.

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Commercial Painting with Epoxy Polyamines

Commercial Painting with epoxy paint

Epoxies are resins used as coatings and adhesives in a number of applications, including commercial paints. When mixed with a hardener such as polyamine, epoxies react to form hard coatings that resist high temperatures and chemical attack. At PennCoat, we often use epoxy polyamine preparations  for painting industrial and commercial spaces that must stand up to wear, chemicals, and contamination.

Characteristics

Epoxy Polyamine paints are typically packaged in 2 components:

  • Part A is resin containing epoxy polymer.  Depending on the paint, it can include solvents, quartz and titanium dioxide. Epoxies contain the epoxide chemical group, which is a cyclic ether containing a 3-atom ring centered by an oxygen atom.
  • Part B is a polyamine hardener that helps determine the product’s characteristics when the two parts are mixed. Amine hardeners undergo a reaction with epoxy resin in which the amine, or NH2, groups polymerize with the epoxide groups to form strong, three-dimensional cross-linked networks that have the desired characteristics.

A common commercial paint we use calls for a 4:1 Part A to B ratio.  It is composed of 80 percent solids by volume (89 percent by weight) that is dry to the touch in about eight hours. When dry, it has excellent durability and resists abrasion, weathering, direct impact, heat, moisture, salt and other chemicals. When subjected to the ASTM moisture condensation test for 1,000 hours, HPE applied to a steel substrate showed no blisters, rust, delamination or creepage. Mixed HPE weighs 12.9 pounds per gallon.

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Industrial and Commercial Painting Selections

Industrial Acrylic Facility Painting

We’d like to devote the next few blogs to the topic of commercial painting. Let’s start with a product we frequently use to paint bare metal, Sherwin Williams DTM Acrylic Coating (DTM stands for “direct to metal”).

Characteristics

SW DTM Acrylic Coating is a corrosion resistant paint/primer composed of 100 percent acrylic. It contains 38 percent solids by volume and 50 percent by weight. The coating is designed to be applied directly to prepared substrates:

  • Iron and Steel
  • Aluminum
  • Galvanized metal
  • Concrete/Masonry
  • Drywall
  • Wood

Of course, its most important feature is that it acts as both a primer and paint when applied on bare, prepared metal. It is available in gloss or semi-gloss finishes and several colors. Caution is necessary when applying to unprimed bare steel because of the possibility of pinpoint rusting — two coats are recommended, each with a thickness of 2.5 to 4 mils when dry. The coating’s acrylic polymers are water- and UV-resistant when they dry, creating a barrier against rust and corrosion.

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Concrete Densifiers for Polished Concrete

Concrete Densifiers

Densifiers are used for polished concrete floors. When added to the concrete, a chemical reaction causes the surface to get extremely hard. While we touched upon densifiers in an earlier blog, we’d like now to examine their characteristics in detail. As is our custom, we’ll zoom in on a product we regularly use at PennCoat, in this case AmeriPolish 3D HS Densifier.

Densifiers for Polished Concrete

Polishing densifiers penetrate the surface of a concrete structure, such as a floor, to give it a better shine and harden it against wear and damage. The densifier helps to solve two problems encountered when polishing concrete:

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