Barkwood is the thickest and strongest vinyl siding you can choose to protect and beautify your home. We make it sturdier and more rigid to lay straighter - and to give your home the clean, crisp lines that you're looking for.

In fact, T-lok Barkwood holds its shape so well, it can conceal miner imperfections in sidewalls to enhance the beauty of you home. Even as the seasons change, it stays straight by resisting the expansion and contraction effects of changing weather and temperatures.

Smart design is always in style. When you choose T-lok Barkwood to create a stylish new look for your home, the good looks will last for years to come. One reason is Mastic's own T-lok design - an advanced locking system that tightly joins panels together. This design and the added thickness means T-lok Barkwood will stay securely in place in winds that would loosen other panels.