Acrylic dispersion Caulk products are designed to be used as a means of filling or concealing any cracks or small gaps that might arise between two substrates which may have some movement in them e.g. between a flexible material such as wood and a non flexible material such as plaster or masonry. ECT Adhesives provides a range of such filers from our partners Siroflex and Nullifier. When selecting a product for a specific application one takes into consideration factors such as flexibility, ease of sanding, ability to paint, suitability for interior or exterior work, fire resistance. ECT Adhesives have the complete range to cater for all requirements.