San Antonio Exterior Painting Contractor
Painting is a major investment. In time. In money. In labor. You know it pays to spend a little extra to get a high-quality, long-lasting finish.
But what does “quality” mean? And what benefits do high-quality paints provide?
Bottom line: Better ingredients mean better performance. A high-quality coating starts with high-quality ingredients that allow the paint to apply more easily, look better and last longer. Here are the four key ingredients that affect the quality of paint:
There are two different types of pigment that go into a can of paint. First are “prime” pigments.
These provide color and hide. Second are low-cost “extender” pigments. By comparison, they add bulk to the product but have little value as it relates to color.
Higher-quality paints have more of the all-important, yet more expensive prime pigments – all the things that in the end give you easier application as well as better durability and color retention.
There are a variety of binders used in today’s paints. Latex paints contain either 100 percent acrylic, styrene-acrylic, or vinyl acrylic binders. Oil paints typically contain linseed oil, soya oil, or modified oils called alkyds.
The type quality and amount of binder affect everything from stain resistance and gloss to adhesion and crack resistance. Higher quality binders, found in higher quality paints, adhere to surfaces better and provide enhanced film integrity and longer lasting performance. This makes them more resistant to cracking, blistering and peeling.
The liquid provides no added performance benefits. It’s simply the “carrier” that allows you to get the paint from the can to the surface.
As you might guess, top quality paints have a greater ratio of solids (pigment and binders) to liquids, while cheaper paints are more “watered down” with liquid.
Additives are ingredients that give a paint a specific benefit that it might not otherwise have. Common additives in higher-end paints include:
Rheology modifiers – provide better hide through flow and leveling of the coating.
Mildewcides – keep mildew in check.
Dispersing agents – keep pigment evenly distributed.
Preservatives – prevent spoilage.
Additives do increase the cost of the product while providing significant added benefits.
We stand behind our paint quality, and so does third-party testing and research.
Question: Is acrylic latex paint a good product for rough-sawn exterior grade plywood siding? Should the plywood siding be treated with a preservative before applying the primer and then top coat.
A: Answer Quality acrylic latex paint is an excellent choice for painting rough-sawn exterior plywood siding. Preservative treatment of the wood before painting is not necessary if proper construction practices are followed when installing the siding. There should be no contact of the bottom edge of the siding with soil or other surfaces where water can puddle.
Question: I have an old, rusty tin roof to paint. What do you recommend?
A:Answer First, determine that the roof is indeed tin, and not galvanized steel. If it is tin, clean and rinse the surface to remove any dirt, mildew or surface contaminants. After the roof is dry, apply a slow-drying, rust-inhibitive oil-based primer followed by two coats of a quality top coat. Industrial-grade acrylics, slower-drying alkyds and aluminum paints can all be used for the finish coats. If the roof is galvanized, make sure it is clean, dry, and sound and then apply a primer like DTM Primer/Finish, following with two coats of DTM Acrylic Finish. Use a conventional roof coating material if the roof is flat.