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Dowsil DC785+ Sanitary Silicone Sealant 310ml White

4.8 (458 reviews)
SKU: 240304163928001 EAN: 5413278248596

Compare 6 prices for Dowsil DC785+ Sanitary Silicone Sealant 310ml White — from £8.21 to £10.95 across 6 UK sellers including BP Tools UK, B & Q, Screwfix and more. Save up to £2.74 (25%).

£8.21 8h ago
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Compare Prices from 6 Sellers

Prices updated 19 Apr 2026
2
B & Q
£9.99 +£1.78
5h
3
Screwfix
£9.99 +£1.78
16h
4
Travis Perkins
£10.84 +£2.63
38h
5
Tooled Up
£10.95 +£2.74
38h
6
My Tool Shed
£10.95 +£2.74
38h
#2 B & Q
5h ago
£9.99 +£1.78
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#3 Screwfix
16h ago
£9.99 +£1.78
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#4 Travis Perkins
38h ago
£10.84 +£2.63
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#5 Tooled Up
38h ago
£10.95 +£2.74
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#6 My Tool Shed
38h ago
£10.95 +£2.74
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If you’re looking for a reliable and high-quality sanitary sealant, you can’t go wrong with Dowsil DC785+ silicone. It provides a strong adhesion to most non-porous surfaces, and is incredibly fast-acting – it will be tack-free within the hour.\nThis sealant provides added protection against mildew and bacteria growth, so it’s suitable for use on sanitary fittings in both domestic and commercial settings. After application, Dowsil DC785+ leaves a shiny and glossy finish – it looks smart and professional, and will stay that way for even longer.\n• Bacteria-resistant acetoxy silicone sealant\n• Gets to work quickly – tack-free in 30 minutes\n• Gloss finish looks smart and tidy\n• Joint movement capability of +/- 20%\n• 100% recovery\n• Application temperature range of +5°C to +40°C
Brand Dowsil
MPN 3279120/C05
No features listed
No items listed

Customer Reviews 458

4.8
458 reviews
5 star
399
4 star
45
3 star
11
2 star
2
1 star
1
Does the job
5.0
February 27, 2026
Bezzo Verified Purchase

1st time using it, it does seem to work very well time will tell

Dowsil Sanitary Sealant
5.0
February 21, 2026
50df509d-cfcf-53fd-9db7-adfaf7c17fa0 Verified Purchase

I do prefer the Dow products to others available on the market. The sanitary sealant sticks well, is smooth and easy to work and gives a nice neat bead. It costs more than some other makes but I think it is worth the extra.

Great job
5.0
February 20, 2026
T Bone Verified Purchase

Looked at other feedback and decided on this. It was easy to use and did a great job. It was a while before the odor cleared so recommend open windows.

Dowsil
5.0
February 20, 2026
3LittleAvenue Verified Purchase

Quality product, as expected works perfectly. Would recommend as an effective sealant.

Shower sealant
5.0
February 18, 2026
Sergio 93 20 Verified Purchase

Worth paying for the best. Top quality product by Dow with mould resistant property’s

Dowsil 785 White Silicone Sealant
5.0
February 18, 2026
Graham Nash Verified Purchase

Nice silicone, easy to apply and smooth out, leaves a good finish.

Brilliant white sticky silicone
5.0
February 17, 2026
Demir Verified Purchase

Love the brilliant white colour, stays white longer than others, easy to apply and mould resistant upto a certain length of time

Recommended bathroom white silicon
5.0
February 17, 2026
87b2c0bc-7401-5ae3-8c86-45e5bdd6e7dd Verified Purchase

My go to white bathroom silicon. Dies exactly what it says on the tube

Does the job
5.0
February 16, 2026
Aprilia Verified Purchase

Good sealant this brand is what i use the most good colour

Great sealant
5.0
February 14, 2026
La la la la Verified Purchase

Great stuff works well easy to apply and smooth over

Use this regularly no problems
5.0
February 9, 2026
3514302e-8650-546f-94ad-facc9f14f722 Verified Purchase

This is a good quality sealant which lasts well and seems less prone to mould than many others.

Recommended by Chat GPT, lets see if its any good
4.0
February 5, 2026
Robbob the superhero Verified Purchase

Will it go mouldy after a while?? Who knows, time will tell. All sealants look good when brand new but its longevity that matters. I went for a more expensive one, and that was recommended by AI.

great sealant
5.0
February 5, 2026
Bertyboy88 Verified Purchase

easy to apply and when it has set, very firm to touch

Great silicone
5.0
January 31, 2026
990301cb-f28e-5cb6-af79-f7567346daa6 Verified Purchase

Great product that does what it's supposed to, good value too.

Excellent product that did not go mouldy last time I used it
5.0
January 30, 2026
Kukri Verified Purchase

Have used it before and was happ and hence the purchase this time

Dowsil DC785+ Sanitary Silicone Sealant 310ml Whit
5.0
January 28, 2026
72477a70-04ef-5532-bc18-27b910afa5c6 Verified Purchase

Very easy to apply, quality silicone, you can tell the difference when applying.

An all round quality product.
5.0
January 26, 2026
Jarg Verified Purchase

Having used many other silicons for years I find it gives a better finish and mould resistance compared to most other brands.

Dowsil DC785 is very good flows nicely
5.0
January 16, 2026
Bill Poster Verified Purchase

Dowsil DC785 is very good flows nicely I would recommend it as a reliable sealent

Excellent Product
5.0
January 15, 2026
Keen DIYer Verified Purchase

This is my go to for sanitary silicone as it has better mould and mildew resistance than others I have used. It does eventually get light mould on it but it is easily removed with cleaner.

Hope it lasts
5.0
January 3, 2026
90ba1e5f-a590-5e81-878e-fb777c49857d Verified Purchase

I chose this sealant based on reviews saying it seals well and doesn't mould. I was nearly put off by some reviews saying it is difficult to work with or doesn't dry.
I found the sealant to be no more difficult to work with than the better quality low-modulus upvc window sealants. I used the product mostly as directed, though I did wipe my finger on a baby wipe then ran it over the bead ONCE. Don't try to go back in to correct anything. With these sealants you do only get one shot at smoothing the bead. And it needs to be done within the fist couple of minutes as it skims over fast.
The product has dried as expected and sealed my shower perfectly. Now only time will tell if it moulds.

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