Elastomeric Paint – Possibly The Best Exterior Paint
Possibly the best exterior finish is elastomeric paint. This coating is so durable it can out perform even the best 100% exterior acrylic paint by 2 to 1. Elastomeric paint forms a durable, tough film that provides a waterproof coating to almost any structure. This paint is resistant to sunlight, heat, cold and wind driven rain.
Plus, it can be applied to all masonry surfaces, particularly stucco and concrete block. But is equally suitable for wood and T-111 siding, check your particular manufacture for compatibility with wood.
You can eliminate cracking in masonry and many types of wood with this very thick coating. Elastomeric coatings have tremendous elongation characteristics, it will bridge and repair non-structural hairline cracks.
This is especially useful with stucco that has developed numerous cracks. But wood surfaces, such as T-111 siding, can gain great benefits from its use. T-111 siding develops a large number of cracks over time. These imperfections must be completely filled with primer and paint or water will penetrate beneath the finish and cause peeling.
Many homeowners, and painters alike, try multiple coats of paint to fill these cracks. This doesn’t last very long. With peeling starting in just 2-3 years with the paint degenerating quickly there after.
Elastomeric Paint Doesn’t Need Multiple Coats
With 2 coats of elastomeric paint over an excellent primer, the cracks will be filled and water will not be able to penetrate. When properly applied a 100% acrylic paint can last 10 years, but an elastomeric coating can last much longer.
When compared to standard house paints the overall cost of this coating is about 50% more.
This is due to increase costs per gallon plus a small spread rate, 50-75 square feet per gallon is typical. If you are paying for labor as well, the cost of application of this coating will be also be higher. A do-it-yourself home owner can apply this product, if you have previous painting experience.
I have applied this coating to T-111 and masonite siding, plus stucco and concrete block, with excellent results. Providing a beautiful finish that will last for many years.
Brush and roller or airless paint sprayer can be used to apply this type of coating. Because of the heavy consistency of this product, a large powerful sprayer is needed. 1 gal per minute output or more is recommended with a tip size of 521 or larger. Choose the spray tip according to the pump manufactures recommendations. Thin this paint with water, if needed, and clean up with a mild soap and water.