Premium weather-resistant silicone building sealant
Seimeda is a single-component silicone building sealant made for glazing and construction joints. It is formulated to stay flexible and adhere strongly across the mixed materials that show up around a window or a glazed facade — glass, aluminium, stainless steel, ceramics, plastics and timber.
Single-component means it comes ready to use with no mixing or measuring on site, and cures on contact with moisture in the air. That matters practically: two-part sealants have to be proportioned and mixed correctly, and mixing errors are a common source of joints that never cure properly.
It is aimed at the work we do every day — installing and sealing windows and doors, glazing sunrooms, and sealing joints on smaller glazed assemblies.
Sealant is not a product our clients choose, but it is one that decides whether their windows leak. Seimeda single-component silicone is one of the sealants we use for the weather seal between a window or door frame and the wall, for glazing beads and for the joints in shower enclosures, alongside DOWSIL where a structural or a specified sealant is required. It is a neutral-cure silicone, so it does not corrode the aluminium or attack the coatings, and it stays flexible through the thermal movement of an aluminium frame in a New York winter.
Every window we install gets a continuous exterior perimeter seal over a backer rod, an interior air seal, and a sill pan sealed at its ends; the sealant is tooled, not smeared, and the joint is sized so the bead can stretch. Where a specification names a sealant — a curtain wall, a structural glazing job, a warranty condition — we use the named product. See waterproofing and DOWSIL.
We supply Seimeda sealant with our installations and to contractors who want the same material we use; tell us the quantity and the colour.
Seimeda S807 is the maker’s weatherproof silicone labelled for architectural sunlight rooms: sunroom, conservatory and skylight glazing. We have a sample on the bench and are running adhesion, sag, compatibility and weathering tests; the write-up, and how to get a free sample from the distributor, is in Seimeda S807: what it is and how we are testing it.
A single-component, neutral-cure silicone building sealant for glazing and construction joints, used for weather sealing windows and doors and for glazing beads.
No; it is a weather and glazing sealant. Structural glazing uses a structural silicone such as DOWSIL 795 or 995.
Neutral-cure silicones do not release acetic acid as they cure, so they do not corrode aluminium, attack coatings or etch mirrors.
Clear, white, black, grey and bronze as standard; we match the frame colour.
Yes, with our installations and to contractors; ask for quantity pricing.
