Dowsil 995 Structural Glazing 305ml – Box of 12

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Suitable For: structural joints in small to medium-sized buildings
Area of use: INT & EXT
Application Method: silicone gun
Volume: 305ml
Container Type: cartridge
Type: sealant
Colour: 3 colours
Brand: Dowsil
Manufactuer: Dowsil
Box Size: 12

Data Sheets

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DOWSIL 995 Silicone Structural Sealant is a one-part, neutral-curing silicone specifically engineered for structural bonding applications involving glass and metal in both factory and field settings. While its surface cure and cure-in-depth rates can be influenced by environmental factors such as temperature and humidity, high temperatures combined with high humidity may slow down the surface cure rate of this sealant. This elastomeric adhesive provides exceptional unprimed adhesion to most building substrates, making it particularly suitable for structural glazing applications in hurricane or impact-rated windows and doors. Additionally, it boasts a movement capability of ±50%, allowing it to accommodate structural shifts effectively.

Key Points:

Application: Designed for structural bonding of glass and metal in factory or field conditions.
Curing Characteristics: Surface cure and depth cure rates are affected by temperature and humidity, with high humidity potentially slowing surface cure.
Adhesion: Offers superior unprimed adhesion to various building substrates, ideal for structural glazing in hurricane-rated installations.
Movement Capability: Features a movement capability of ±50%, allowing it to handle structural movement effectively.

For all other Dow Corning products on our website, please click here.

For any further information, you may need, please visit the Geocel website here.

Alternative products please see below, options like CT1 are available.

Dowsil 995 is suitable for structural joints in small to medium-sized buildings can utilize protective glass sealants designed to withstand bomb blasts, enhance school security glazing, and endure severe weather conditions.

Preparation

Thoroughly clean all joints and glazing pockets, ensuring the removal of foreign materials and contaminants such as grease, oil, dust, water, frost, surface dirt, old sealants, glazing compounds, and protective coatings.

Application Method

Begin by installing back-up materials or joint fillers, setting blocks, spacer shims, and tapes. Mask areas adjacent to the joints to achieve clean sealant lines. While primer is usually unnecessary for nonporous surfaces, it may be beneficial for optimal sealing on certain porous surfaces; conducting a test placement is recommended.

Apply DOWSIL™ 995 Silicone Structural Sealant in a continuous manner using positive pressure. The sealant can be dispensed with various air-operated guns and most bulk dispensing equipment. Before a skin forms, typically within 10 minutes, tool the sealant with light pressure to ensure it adheres well to the backing material and joint surfaces. Remove the masking tape promptly after tooling the bead.

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Elementlength
	up to 1,5 m	up to 2,5 m	up to 3,5 m	up to 4,5 m	up to 2,5 m	up to 3,5 m	up to 4,5 m
Type of window frame material	Minimum witdth of joints for a butled mounting b in mm				Minimum witdth of joints for a inner mounting b in mm
Hard PVC (white)	10	15	20	25	10	10	15
Hard PVC and PMMA (dark) (colour extruded)	15	20	25	30	10	15	20
Hard PUR integral foam	10	10	15	20	10	10	15
Wood-aluminium-window	10	10	15	20	10	10	15
Aluminium-plastic sandwich frame (bright)	10	10	15	20	10	10	15
Aluminium-plastic sandwich frame (dark)	10	15	20	25	10	10	15
Wooden window frame	10	10	10	10	10	10	10

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Bond-It De-Bond Mate Silicone Sealant Remover

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CLEARANCE – ARBO Arbosil 1070 Fire Resistant Silicone GREY 380ml

~~£8.14~~£1.19 inc. VAT
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~~£8.14~~£1.19 inc. VAT
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ARBO Arbosil 1070 represents a single-component, Low Modulus Silicone Sealant with Fire-Resistant properties. It undergoes curing upon exposure to moisture vapor, ultimately transforming into a highly flexible silicone rubber material. For more information on Arbo, please visit their website here. For more in our range of sealants, please click here. For application guns to use with this product, please click here.

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CLEARANCE – Bond It LMH25 Internal & External Sealant 380ml RED

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~~£3.61~~£1.19 inc. VAT
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~~£3.61~~£1.19 inc. VAT
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Bond It LMH25 is a tough, flexible hybrid sealant ideal for installing internal and external window and door frames. Can also be used for sealing expansion and connection joints between most common substrates, without the use of a primer. PLEASE NOTE: THIS PRODUCT HAS A SHELF LIFE OF ONE MONTH BENEFITS - Solvent‐free & low odour. - Easy to tool and finish. - Can be overpainted with water based paints. - UV resistant. - Quick curing. - Contains no isocyanates, solvents, silicone and phthalates. - Excellent adhesion to most surfaces (even moist surf

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Damian Vizzard - Blazing Burners

15:15 02 Nov 24

We've used Sealant Supplies a few times now and will continue to use them. They are competitively priced and deliver quickly, and the choice for products is great. Customer service is top notch too! Highly recommended.

Helen Jones

14:02 01 Nov 24

Excellent service and product. Would recommend and definitely use again.

Ryan Thorne

16:04 28 Oct 24

Sun Shine

11:56 01 Oct 24

I made a purchase from Sealant Supplies for Mapei Kerapoxy (5kg) (who were significantly cheaper than elsewhere, I ended up buying 4 tubs!).For those in the know.... this is an excellent product, easy to apply, excellent finish and most important the only product to use when you want your white grout to remain white!Epoxy grout is more expensive than normal grout, but in my view it works out so significantly cheaper. We did a huge bathroom, including steam shower, using 2 tubs.I always measure small quantities to mix, apply, have a cuppa, wash off, and the following morning wash again to remove any haze.The UK is very slowly becoming aware of the benefits of Epoxy grout, so this product is rarely kept in stock. Usually website do not advertise this, but inform you at point of purchase. On Sealant Supplies website, they were honest stating this was not a stocked item, and giving a rough delivery period. I was extremely pleased when the items we ordered where dispatch immediately and received the following day, in perfect condition.I normally do not write reviews (good or bad), but after having numerous issues with suppliers, it was such a pleasure to order something, and receive what I ordered timely, in perfect condition at the cheapest price.I cannot recommend this company enough, and will be using them going forward.

Tony Zudys

11:05 01 Oct 24

What a happy discovery! One supplier with every possible sealant or adhesive, whatever you purpose.Excellent pricing, rapid delivery, and best of all wonderful videos showing expert tips - wish I'd seen those a few years ago!

Colin McClung

10:09 01 Oct 24

Excellent product range, excellent service

Acton Glass Ltd

15:21 28 Aug 24

Great Company. Wide range of sealants and excellent prices. I will buy it again.

Ady

04:46 13 Aug 24

Fantastic range of sealants and other products at very good prices, all with knowledgeable friendly service.Recommended.

Nicole Ho

12:41 06 Aug 24

The service is fast and reliable. Every question is answered promptly, with quick responses and a friendly attitude.

Roger Rockley

11:40 06 Aug 24

Top drawer, delivery,quality and price point 10/10 thx

Kathy

10:22 06 Aug 24

Excellent choice of products here at very competitive prices combined with good old-fashioned customer service and extremely fast delivery. Will keep shopping here.

Ian Black

10:19 06 Aug 24

Good variety of products, prices very competitive and a first class delivery.Definitely use again.

P B

10:17 06 Aug 24

ExcellentGreat products and service, definitely recommend!

Bradly Gladden

09:50 10 Jul 24

Always friendly staff very helpful and always have what I need in stock

David R.

09:26 10 Jul 24

Excellent company to deal with, and with a good range of products at competitive prices.

Ashley Stevens

12:28 09 Jul 24

Great to deal with 100% will use again.

waqas rafiq

09:11 17 Jun 24

Amazing service from Mike and the team, got exactly what I needed and was kept updated through out the whole way. Will most certainly be using them again!

Jacqueline Kelsall

15:37 05 Jun 24

Highly recommend.Good products at competitive prices. Dispatched promptly and well packaged.

Alan Fuller

14:03 02 May 24

The service we received from SSL was exceptional. Very clear and easy to use website, speedy delivery along with fantastic products which deliver what it says on the tin. Plus staff gave me good advice regarding which product would be best for my project. Well done SSL.

Charlene Hurlock

08:30 25 Apr 24

Great service - Love Reggie!

Carla Villa

06:20 25 Apr 24

Quality sealant and adhesive properties good value for money I'll use again without doubt many thanks

Beverley Betts

13:17 24 Apr 24

Very fast delivery. Very good product. Very happy with service.

Tim B

10:54 14 Apr 24

Over a week and still no details about what is going on with my order. Will likely will have to do a charge back.

Christian Gluntz

10:13 02 Feb 24

Dianne David

13:07 20 Jan 24

I needed to fix a couple of mouse mesh panels to outside airbricks. Realising that they would needed to be stuck instead of screwed into place, I googled sealant and adhesive that would do the job.Sealant Supplies had exactly what I needed and at a brilliant price. It was delivered really quickly and I'm really pleased with the result.

Luke Badcock

11:32 19 Jan 24

Amazing customer service, they had what I needed, super quick turnaround👏 highly recommended 👌

MICHAEL BELTON

11:08 19 Jan 24

GREAT SERVICE

Chris Meeks

11:03 03 Jan 24

First time customer, visited the store and had a friendly welcome. Got advised on what products I needed. Very happy with the service provided and the cost of the items.

Ella Harding

20:42 19 Dec 23

Eliza Parkin

20:41 19 Dec 23

Fantastic service by Mike and Reggie. Colour matched my kitchen perfectly. Thank you

Dani Dani

12:58 18 Dec 23

Good shop to buy things , very good products and good ppl on shop !

J GRANT

11:44 15 Dec 23

The product that I purchased did an excellent job. It arrived on time and I would definitely use these traders again.

Richard curd

16:08 14 Dec 23

5 stars that's all you can say about sealant supplies Ltd we are a small company and they are there to help .

Ivan Watton

13:06 14 Dec 23

I purchased some lead guttering repair sealant from Sealant Supplies Ltd and the on-line purchase was quick and easy. The delivery address was in Norther Ireand and I received the product 2 days later which was an excellent service. Will definitely us this company again and gladly recommend them.

Kris Treharne

16:28 01 Dec 23

Brilliant service and good deal 👍🏻Use them all the time.

Rhys Smith

08:51 23 Nov 23

Highly recommended for all your sealant and mastic requirements, reasonable priced and very helpful

Manchester Help

09:28 30 Oct 23

I found Sealant Supplies through an online search for ARBO sealant and was impressed with the range of competitively priced products on the website. The online ordering process is straightforward and the shipping time was quick - we will back to purchase more in the future.

Clive Goudercourt

11:32 27 Oct 23

This was my first visit to sealant supplies, here’s my review; The website is so easy to navigate, which, for me is good as I do sometimes struggle with them. I found there was a really good range of products and the prices are really good. I had done a bit of searching around on the net as I need a lot of product so want to get the best price I could get. After a couple of minutes I’d found what I wanted and added to my basket, went through the payment process and that was it, done.Delivery was actually a lot faster than I expected and the product was very well wrapped. I bought some expanding foam and, if you’re reading this you probably know the differences in quality of this kind of product. I did think that at the price it wouldn’t be the best, but my mind was put at rest when I used it. The foam is a really good quality product and absolutely perfect for the job I’m doing, which is restoring an old motorhome.To summarise, great website, well laid out, easy to navigate, secure payment options, super quick delivery and really well packed. Don’t think I could ask for more and I’ll certainly be using Sealant supplies again, what a great find.

margaret mcgeever

16:20 26 Oct 23

Excellent service knew what I need led and speedy delivery and great price. Thank you

michael coleman

14:49 26 Oct 23

Excellent service, fast delivery of good products

Rick Guy

10:56 13 Oct 23

paid for express delivery. was delivered 3 days later. had to source elsewhere as trades starting on site. when returning the item was charged a further 25% restocking fee. If they had sent on time I wouldnt have had an issue.

scott williams

13:48 11 Oct 23

Great service

Nick S

11:03 04 Oct 23

Excellent quick service.Thoroughly recommended.

Win Fix

10:53 03 Oct 23

Brilliant service, friendly bunch of good people always ready to help.Will definitely come back.Thanks Mike

No One

09:39 03 Oct 23

Cheapest around

ian stewart

00:42 29 Sep 23

Great company to deal with

David Ellis

11:11 28 Sep 23

Excellent service, first class customer service and also sales advice. Excellent range and customer care. Five stars from me

Manjit Singh

11:27 25 Sep 23

Top service

Lewis Hodge

08:35 14 Sep 23

Very helpful 👍 would use again.

frank saville

08:31 14 Sep 23

sean quinn

15:48 05 Sep 23

I’ve been waiting over two weeks for a delivery. I was promised next day delivery 5 days ago and still no sign. Won’t be using again.

Eric McQueen

17:45 30 Aug 23

Excellent service and prompt delivery. Definitely use this company again.

AG Fencing

12:30 30 Aug 23

Good communication, high quality products with competitive prices!

Tom

14:45 11 Aug 23

Great products, good prices and great communication!

Parbinder Singh

09:31 08 Aug 23

Good stock level and fast service.

John Oldham

18:05 27 Jul 23

Bought plasterers enhanced gritcoat from sealant supplies, this is a great prep grit before plastering, easy to spread and sets hard, got a great price from sealant supplies with speedy delivery.

googlenick 2

16:02 27 Jul 23

I needed my order in a rush and SSL were really helpful getting it despatched very quickly. Friendly and customer focussed, plus a good range of stock at competitive prices - highly recommended

roy atkinson

14:34 27 Jul 23

Brilliant silicone fast delivery will certainly recommend you to all trades i deal with

Simon Roberts

22:45 30 May 23

Great price and great communication. Products arrived in good time and perfect for the job, a fungicidal wash to help keep moss off the roof. Already recommended Sealant Supplies to a neighbour so we'll no doubt have the cleanest roofs in the area :-)

julie close

18:25 30 May 23

Excellent service. Very easy to order and purchase. Very helpful with my query on the phone.

Matt Dodman

14:18 19 Apr 23

Great product, great service with a competitive price and efficient delivery. I highly recommend Sealant Supplies!

Alan Gray

10:20 19 Apr 23

I ordered mastic online from Sealant Supplies and was very pleased with the product supplied. The delivery service service was very fast and cost was very competitive. I do use a lot of mastic from time to time on different projects and will certainly be using Sealant Supplies again for future orders.Thanks Alan

June Brook

08:26 05 Apr 23

I found exactly what I needed here and it was delivered quickly and well packaged. The grout and sealant I purchased was of very good quality and easy to use. I would have no hesitation in recommending this company and will purchase from them again in the future.

Eóin Dawson

15:33 14 Feb 23

Delivered exactly what I needed in a really timely manner all the way to N. Ireland, which a lot of companies seem to struggle with these days. The sealant was well packaged and arrived in perfect condition. Overall an inexpensive, hassle free experience.

Sarah Jackson

01:21 09 Feb 23

Could not get epoxy grouting from anywhere in Northern Ireland but I came across sealant supplies and they sent it in good time great price and well packed !!!!!just want to say thank you for a great service

Amanda Macdonald

12:02 24 Jan 23

Quick and easy order and delivery. Was actually surprised how quick they were at getting it delivered. We will definately use Sealant Supplies again. And recommend to my other clients Thanks

Stephen Hudson

19:12 15 Sep 22

Tried to obtain Wide Gap Joint Fill unsuccessfully all over the country without success but Sealant Supplies came up trumps! Not only did they have it in stock but the price was lower than prices I had seen elsewhere (and the othes couldn't deliver anyway as they were 'out of stock'). Not only that but delivery was extremely quick too. Good company first class service!

Simon

12:11 14 Sep 22

James and the team were great. Our block paved back patio, side path & driveway were a mess. Over 15 years old, full of moss & weed and badly discoloured by black & white lichen. I was on a budget so forced to completely jet wash, bleach, re-colour, re-sand & seal from scratch (or replace with tarmac costing £'000). Decided to use Bond It "Drive Alive" products including the new black & brindle colour enhancer and patio seal. Found "Sealant Supplies" online so ordered over the internet, paid by PayPal. Orders confirmed by reply email. Goods delivered within 3 working days. Great service from the guys. Project cost a little over £500 of which +£350 with Sealant Supplies. Much cheaper solution than replacement. Photos speak for themselves.Thanks, Sealant Supplies!

Paul Morris

07:01 03 Sep 22

Initially the items I ordered didn't turn up and when I contacted the team about this they were excellent, very apologetic and arranged for the items to be re-sent out straight away. Things do go wrong, probably with the delivery company, but the important thing is how they are dealt with when this happens and in this case the team at Sealant Supplies were brilliant. Many thanks to all involved in quickly resolving this for me.

Mohammed Esmail

16:06 02 Sep 22

I used Sealant Supplies (via Amazon) to purchase Resiblock Gloss Superior Block Paving Patio Sealer. The delivery time was on schedule and the price was cheaper than other distributers - thumbs up from me

Dave Meyrick

13:09 02 Sep 22

Brilliant prices, brilliant after sales service. I really wouldn't hesitate to use sealant supplies again for all my sealants and coatings. Easy to purchase what you require on line. Quick delivery time. Highly recommend sealant supplies.

Raymond Gregg

11:24 02 Sep 22

Spent a lot of time looking for the right colour of sealant with no real results until I stumbled across Sealant Supplies. I was able to match the colour I required with their color swatches and ordering was some painless via their website. Item was ordered and I was kept up to date as to when my item was despatched and it was delivered before the estimated delivery date even thought it had to be delivered to Northern Ireland. My first stop now for sealant will be Sealant Supplies. Excellent service, highly recommended.

Elaine Robins

08:37 26 Jul 22

Fantastic Company with just about possible colour Sealant you could ever want and a really wide range of products available.Both Mike & James are a wealth of knowledge and offer great customer service. Great Prices too!!Can't recommend highly enough.

Dowsil 995 Structural Glazing 305ml – Box of 12

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