... on many substrance Excellent weatherability long shelf life CharacteristicsHX-4800 is one-component, neutral-curing, silicone sealant with ... wallSealing of connecting and expansion joints in the buildingAdhesionHX-4800 exhibits excellent primerless adhesion to many substrates, e.g ... of the substrates with a primer.Restrictions on useHX-4800 may be discolored in contact with some organic elastomers, ...