Dow Corning 785+ Sanitary Silicone

Dow Corning 785+ Sanitary Silicone is the one to reach for when you need a bathroom or kitchen seal that actually stays clean. Kitchens, bathrooms, wet rooms, shower enclosures — anywhere moisture and warmth combine to create ideal conditions for mould, this sealant has the fungicide already built in. No separate anti-germ product needed, no extra step, no extra cost.

The built-in fungicide is proven effective against mould growth, and the product has been independently tested against salmonella, E. coli and MRSA. That matters in commercial settings especially — care homes, hospitals, restaurants, school facilities — but it’s just as relevant in any domestic bathroom where mould always seems to win the long game.

Why 785+ Holds Up in Wet Areas

A 25% joint movement capability means the seal stays intact even where there’s slight structural movement or thermal expansion and contraction. Bathrooms are exactly that kind of environment. Warm showers, cold nights, a bit of flex in the substrate — a sealant with no movement tolerance will crack and gap. The 785+ handles it without complaint.

It conforms to ISO 22196:2007 and ISO 11600-F-20HM, which covers both antimicrobial performance and the mechanical requirements for sanitary-grade silicone. If you’re working on a job that needs documented compliance, this ticks those boxes.

Colour Options

Dow Corning 785+ Sanitary Silicone comes in Clear, White and Manhattan Grey. White is the go-to for most bathroom and kitchen installs. Manhattan Grey suits slate tiles, dark grout lines and contemporary bathrooms where white would stand out awkwardly. Clear works well on glass, mirrors or anywhere you want the silicone to disappear into the background.

It’s a fast-curing formula, which helps on site when you need to hand over a bathroom in a reasonable time rather than leaving a job half-finished.