The Ultimate Decorators Caulk 380ml has over double the flexibility of leading caulk brands at 12.5%, making it more resistant to movement and longer-lasting. Fill deeper, wider and overpaint in 1 hour!
 
HB42 Ultimate Decorators Caulk fills deeper and wider than most other caulks – designed for a professional finish. HB42 Pro-finish Caulk is an easily applied, white, solvent-free, acrylic sealant for external & internal use. It forms a a durable, flexible seal and contains a fungicide to discourage mould growth. It can be overpainted within 1 hour depending on temperature and humidity. HB42 Ultimate Pro-Finish Decorators Caulk is made to the highest specification and will withstand joint movement capability of up to 12.5% and can be used in joints up to 25mm wide and 20mm deep. Manufactured to EN ISO1 1600 F 12.5P, BS EN 15651, F-EXT-INT. For sealing cracks and gaps. Can be used as an adhesive for polystyrene. Not suitable on PE, PP, Teflon and bituminous surfaces.