The bottom line is that if only clear coats are applied to exterior bare wood they provide only temporary protection against UV damage and degrade fairly rapidly so that even their ability to repel water may only last for a year or two. Within a few months the home will end up being multicolored with sun protected areas being significantly lighter than those areas exposed to direct sunlight.
|Effect of 18 Months of Sun Exposure on Bare Northern White Cedar|
|Bare Wood||Bare Wood After 18 Months|
So how does a colored finish avoid these same issues? The colorants or pigments contained in a colored finish absorb UV light and remain active as long as the pigments remain on the surface. It is the pigment that does the majority of the work protecting the underlying wood from the effects of UV exposure. The purpose of our Lifeline Advance Clear Topcoat is to protect the color coats just like the clear coat on a car. In addition to making a car attractive, car paint is designed to protect the underlying metal. The job of the clear coat is to protect the paint.
The same concept applies to our exterior finish systems. The color coats protect the underlying wood and the Lifeline Advance Clear Topcoat protects the color coats from the effects of dirt, wind, sunlight and weather. If you want a bare wood look, you can choose a color like Butternut or Wheat. They have the appearance of bare wood, but offer the UV protection inherent in a high quality pigmented stain. Note: These colors still need to be topcoated with Lifeline Advance. We occasionally get calls from potential customers who only want to purchase our Lifeline Advance exterior clear coat to apply to bare wood and become upset when we refuse to sell it to them. It's because we know that they will be disappointed with the results. We pride ourselves in supplying the very best finish systems in the world and to knowingly sell something to a log home owner that will not live up to our high performance standards is not the way Perma-Chink Systems, Inc. does business.