TWP ® is a unique combination of chemicals, preserving and enhancing the natural warmth, beauty, and integrity of new and old wood. The products penetrate deeply into the wood without excessive surface film build, highlighting existing grain patterns with amazing clarity and warmth. It is specifically designed to provide protection against the four major causes of wood degradation; wood rot, water, sunlight and mildew. It also reduces water absorption, the major cause of wood cracking and veneer siding delamination and stops wood rot that destroys wood internally, causing structural failure that may require wood replacement. TWP ® has a life expectancy of three to five years (on vertical substrates) with proper preparation of substrate, proper application and two coats. Life expectancy is longer on two year old wood. TWP® is extremely lightfast, containing ultraviolet light absorbers maintaining the natural color, while surface mildewcides eliminate premature unsightly gray and black discoloration. Accelerated and natural weathering tests show superior performance compared to conventional clear and semi transparent wood finishes. Many stains on the market are surface oriented and subject to peeling, blistering and chipping. TWP® will not crack, peel or blister.