Product & Company at a glance
Whenever we teach a Siga Air-Tight Construction Workshop, one of the first questions is inevitably: "how long will this stuff last?"
It's an impossible question to answer with any certainty. It's certainly a very long time. SIGA has seen plenty of 20+ year applications getting new work which allows inspections of old work, and the old work is doing fine. It tests well in rapid aging laboratories, but as we all can understand, there are factors come into play over the long haul and there are going to be cases where building movement, saturation and building damage preclude anything from working; Let alone gaps simply filled with spray foam or caulking.
SIGA products won't become embrittled as the solvents dry out like you often see happening with rubber based, or duct tapes. There are no solvents or VOC's in SIGA. Because of that, all but of one of the SIGA products have no shelf life. Having no shelf life supports the long life span expected of the products.
The one product that does have a shelf life is the primer Dockskin. It's not an adhesive. If you're past its' shelf life, a bond doesn't fail, it's just gets thick and is hard to brush it onto the concrete.
Since air-tight construction with adhesive tapes is new to the US, we always ask the workshop attendee's,"What do you use to seal the envelope with now?" The answers are always the same: They range from: "Nothing", to "caulking", or "foam".
What's learned by trying the SIGA system of air-tight sealing tapes is that it's a new approach that gives a more reliable result. The standard 60mm (2 1/4") wide SIGA tape will provide an 30mm (1 1/8") wide seal on both sides of the joint. You'll find so much adhesive on the tape that it will literally "move" with the substrate it's applied to. It won't tear. What this means is that all of the building movement that it will be subjected to... It can handle without failure. The comparison to make is to a caulk or foam that will dry out and not move with the building as it "ages in place". It's the long-term reliability that is the reason that tapes like SIGA have come to dominate the European construction market.
SIGA Products are nice for the project and the job site as well: There are no VOC's in any of the products to off gas as you use them, or later in the new air-tight envelope for your customer. At the end of the airsealing stage of slab, walls, windows, or whatever needs sealing, there is no dumpster full of empty plastic caulking tubes or messy foam cans on their way to a land fill. The only thing left are cardboard roll ends, strips of release paper, and a cardboard box or two... all of which can go into the paper recycling bin.