Geocel Contractors Decorators Caulk is a one part, easy to apply flexible acrylic filler which is ideal for sealing gaps and cracks prior to decorating. It has been specifically developed for the painting and decorating contractor where large volume usage is expected.It has been specifically developed for the painting and decorating contractor where large volume usage is expected. · · · Internal and external pointing around door and window frames · · Sealing around skirting boards and architraves · · Sealing joints between plaster board panels · · Sealing gaps and cracks in plaster · · Easy application · · Acrylic filler