<br />Surfaces treated with Enviroseal remain permeable to vapour so that moisture within the structure does not remain trapped.<br /><br />Enviroseal is clear and colourless and will not normally alter the appearance of treated surfaces. In some cases, however, very slightly darkening may occur, so a small test area should be applied when appearance is critical.<br /><br />Depending upon the nature of the surface treated and conditions of exposure, two coats of Enviroseal can be effective for at least 10 years.">