silicone- why?

opps · 16 Jun 2018

She who must be obeyed decided to have our aluminium double glazed windows replaced with uPVC.

A year later, I am finally getting around to repainting our rendered exterior. Thus far I have spent 2.5 hours trying to remove the effing silicone between the beadings and the painted render.

Why do the vast majority of double glazers use silicone where an MS polymer would be more suitable? Is it ignorance, cost or do they just see it as "someone else's problem"?

Keithmac · 16 Jun 2018

Our last windows had been in in excess of 20 years, the silicone was still sound and leak free, new ones have been sealed wirh silicone as well and should last the same hopefully!.

Only time it would be an issue is when painting as you have found, cant you mask around the joints?.

honda · 16 Jun 2018

opps said:
She who must be obeyed decided to have our aluminium double glazed windows replaced with uPVC.

A year later, I am finally getting around to repainting our rendered exterior. Thus far I have spent 2.5 hours trying to remove the effing silicone between the beadings and the painted render.

Why do the vast majority of double glazers use silicone where an MS polymer would be more suitable? Is it ignorance, cost or do they just see it as "someone else's problem"?

Because it's fast, easy, hides a multitude of sins and initialy "looks good". I hate the stuff

opps · 16 Jun 2018

Keithmac said:
Only time it would be an issue is when painting as you have found, cant you mask around the joints?.

You would hope that the people fitting the windows would assume that the owner might possibly want to repaint their house at some point.

Masking tape is not an option. I want a painted finish with clean lines and that wont crack off at the edges whenever the window cleaner does his thang.

Am currently using a multitool, chisels and stanley knife, and where necessary, I will back fill damaged areas with filler and then run a bead of CT1 before then painting.

Plumbers and uPVC fitters are definitely two trades that should not be allowed anywhere near a tube of silicone sealant (ok, perhaps not all of them, but most of them).

Notch7 · 16 Jun 2018

Does CT1 set hard?

If so Id use a more flexible MS polymer.

Window fitters use silicone cos its cheap, only £1.00 or so a tube. MS is more £3 CT1 more £10!

Cutting of silicone is a horrible job.....best of luck

opps · 16 Jun 2018

Notch7 said:
Does CT1 set hard?

If so Id use a more flexible MS polymer.

Window fitters use silicone cos its cheap, only £1.00 or so a tube. MS is more £3 CT1 more £10!

Cutting of silicone is a horrible job.....best of luck

CT1 remains flexible. I use it because it is widely available and has a wider range of colours than any other brand that I can think of.

When replacing putty (for example) I use Timbabuild glazing (it is half the price).

Notch7 · 16 Jun 2018

opps said:
CT1 remains flexible. I use it because it is widely available and has a wider range of colours than any other brand that I can think of.

When replacing putty (for example) I use Timbabuild glazing (it is half the price).

Thanks.

We tried timbabuild for face putty on a job, but found it too hard to get out of the tube.....so hard it broke 2 mastic guns.

I tried because we usually use repaircare dryseal, but at £11 a tube its a bit pricey.

We use it for bedding slimlite double glazed units instead of traditional face putty

opps · 16 Jun 2018

Notch7 said:
We tried timbabuild for face putty on a job, but found it too hard to get out of the tube.....so hard it broke 2 mastic guns.

Yes, it is much thicker.

I had to buy a higher trust ratio gun from screwfix to work with it.

https://www.screwfix.com/p/p-c-cox-sealant-adhesive-dispensing-gun/4379h

It's a great gun but do not use it with thin products as they will come out too quickly.

A friend of mine who repairs sliding sash windows uses white Stixall.

Apropos RepairCare, I tend to use Timbabuild products because I get the impression that their products are equal in quality but significantly cheaper.

That said, I have only been using epoxy resin for about 2 years and have very limited experience of the repaircare range. Your feedback would be appreciated.

Thanks

Gazman16 · 19 Jun 2018

Wurth acrylic sealant for internal and external use.
Masking tape a nice straight edge, Gun, Run finger in both directions multiple times, Paint and remove tape.

You could possibly even caulk/paint over existing silicone.

Notch7 · 19 Jun 2018

opps said:
Yes, it is much thicker.

I had to buy a higher trust ratio gun from screwfix to work with it.

https://www.screwfix.com/p/p-c-cox-sealant-adhesive-dispensing-gun/4379h

It's a great gun but do not use it with thin products as they will come out too quickly.

A friend of mine who repairs sliding sash windows uses white Stixall.

Apropos RepairCare, I tend to use Timbabuild products because I get the impression that their products are equal in quality but significantly cheaper.

That said, I have only been using epoxy resin for about 2 years and have very limited experience of the repaircare range. Your feedback would be appreciated.

Thanks

Ive actually only used dryseal, as we make new windows not do repairs, I do know chippies that use their epoxy repair system and are pleased with it....apart ftom the cost

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silicone- why?

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