The new thermoplastic glueing process for Jasba mosaics is also eminently suitable for permanently wet and underwater areas. Tests by independent institutes have confirmed that the fibreglass net is not subject to microbiological attack under normal hygienic conditions. The bond properties after dry and wet storage are above the standard values. Accordingly, thermoplastic glueing on the back is not only recommended for dry areas but also for underwater areas (swimming pools and whirlpools) as well as for areas permanently exposed to