API-WP30 and API-WP40 were designed as low VOC water repellents that provide immediate, high contact angle water beading once dried and cured. API-WP30 is a silicone free emulsion for application on wood. API-WP40 is a silicone emulsion for application on both wood and masonry. API-WP30 and API-WP40 produce a clear coating leaving the appearance of the coated surface unchanged.