Depending on its moisture, softwoods and hardwoods expand and contract constantly, and some more than others. Aluminium expands and contracts in accordance to temperature. OB1 Construction Sealant & Adhesive will maintain its robust bond when cured from -40°C to +120°C and therefore is able to cope in harsh external weathering conditions and in a refrigerated environment. Its bond has the ability to elongate up to 350%.The original formula makes OB1 Construction Sealant & Adhesive the ideal sealant for under water applications even resistant to saltwater. Its hybrid polymer formulation can be applied under water and retains its initial bond. It also acts as a structural underwater bond in closed-face applications in swimming pools such as floor and wall tiles without the need to drain the pool.The original solvent free hybrid polymer formula used in OB1 Construction Sealant & Adhesive allows flexible adhesion that can move with the expansion and contraction of metal and steel without etching or burning the surfaces. For polypropylene and polyethylene contact manufactures technical services.Typically solar panels are installed with mechanical fixings drilled into the roof substrate. They are sealed with silicone mastics which contain a solvent base. The solvent will eventually evaporate causing the mastic to collapse hence the seal/bond line failing. OB1 Construction Sealant & Adhesive does not contain any solvents so it will never crack, shrink or collapse, creating a permanent seal/bond. In addition it has a high resistance to weathering.Gutters leak when the EPDM Seal degrades from exposure to the elements. Silicone sealants are often used to repair the seal, but the surface has to be dry first. Solvents within the sealant will evaporate causing it to shrink and collapse on the seal/bond line resulting in failure. OB1 Construction Sealant & Adhesive performs flawlessly even when applied under water, doesn’t contain solvents, so therefore will never shrink or crack. It’s the perfect repair for leaking gutters. · · · Excellent Chemical Resistance · · Resists Fungal Growth · · Weather Resistant · · Unique Flexibility · · Available in 9 colours · · White · · Dimensions: W:55 H:227