Internal Sealants

Our range of high-performance sealants is designed to deliver lasting protection, flexibility, and a clean finish across a wide variety of construction and remedial applications. From internal mastic work to external weatherproofing, each product is selected for its proven durability, adhesion, and resistance to the elements.

Whether you're sealing joints, frames, facades, or sanitary areas, Optimum’s sealant collection includes trusted solutions like Arbosil HM — available in a variety of colours to suit every project.