SX Siroflex Instant Paintable Decoratiors Caulk White is a fast drying, low odour caulk that is suitable for interior application. The instant paintable decorators white caulk is ideal for sealing and filling gaps between plasterwork, window frames, door frames, skirting boards and architraves. The Siroflex Instant Paintable Decorators Caulk can be overcoated with water-based and synthetics immediately after application. Siroflex Decorators Caulk prevents cracks and discolouration of paints and is the perfect adhesion without the use of a primer to most substrates.