For superior acoustic performance. It complies with BS 1230 Type 1 and BS EN 520 Types D and I. The board is composed of Aerated Calcium sulphate di-hydrate with fillers and fibres enclosed inside tough liner papers with bound edges. Core and papers are bonded with starch. Edge glue is PVA. It has a reaction to fire rating of Euroclass A2-s1, d0. GTEC dB Board can be jointed and finished with any of the GTEC Jointing systems. It can be plastered on either side using single coat proprietary gypsum finishing plasters not less then 2mm thick. The blue liner paper requires more paint obscuration than normal ivory liner. Allow 10 litres / 100 m2.