Joint Sealants

StockedWhite sausages at all five yards. Any other color is a special order — tell us early and it is not a problem.

Most of what this sealant does on our jobs happens on a substrate behind the cladding, where nobody will ever see it and the color is irrelevant. Stocking white deep beats stocking twelve colors thin, because the thing that actually stops a crew is the sausage not being there on Tuesday.

If the joint is going to be looked at — a visible architectural joint, a curtain wall, a finish coat you are matching — that is when the color matters and that is when you order it. Dymonic 100 holds color better than anything else in the line, so it is worth specifying rather than settling. Send us the color early and it arrives with the rest of the order.

By orderOrdered against the spec with the lead time quoted up front.

It is the sealant that covers the most ground. ±50% movement handles nearly any joint you will design, the long skin time means a crew can gun a whole elevation and come back to tool it, and the color stability is the reason it still looks right on a building five years after handover. If we were only going to keep one on the floor, this is the one — and right now it is the one.

Start with the joint. Vertical and it needs to hold its shape — non-sag, so Vulkem 116 or a Dymonic. Horizontal and walked or driven on — self-levelling and traffic-rated, so Vulkem 45 SSL. Moving a lot — ±50%, so Dymonic. Visible and the color has to last — Dymonic 100. Cold, or the crew comes back tomorrow — Dymonic FC.

A sealant bonded on three sides cannot stretch and tears at the first cold snap. Backer rod sets the depth and breaks the bond at the back, so the joint works in two directions. The rule of thumb is half the joint width for depth, and never less than a quarter inch. We stock the rod with the sealant because the two get bought together or the job fails.

Tremco