Mould is just one of many causes of stains on silicone sealants that are frequently overlooked ... and antiviral properties, plus it acts as a natural bleaching agent. The ubiquitous three percent ...

SikaSil-C 990 is a one-component silicone sealant with plus-100%, minus-50% movement capability and is targeted for exterior insulating finish system facade joints and other weatherseal applications.

“It’s not necessarily new as they have been around in some form since the 90s, but it’s much better today because silicone sealant doesn’t cause ride disturbances. In the past, sealants ...