Screwfix OB1 sealant / adhesive

[RivalRedwing]

A flyer came through relating to the above claiming that it is very multipurpose and can do anything bar act as a dental filling - has anyone with some trade knowledge used it in anger? Is it as good as they claim? (lets be careful of the Mods).
Here's a link: OB1 Multi-Purpose Sealant & Adhesive Black 290ml

no personal interest etc.

 

[vyv_cox]

The reviews are interesting. One reviewer says he was told it was an alternative for CT1. Most are positive, the exception being someone who tried the virtually impossible with it.

 

[fredrussell]

The thing with OB1 is that if you strike it down, it only becomes stronger.

 

[VicS]

A flyer came through relating to the above claiming that it is very multipurpose and can do anything bar act as a dental filling - has anyone with some trade knowledge used it in anger? Is it as good as they claim? (lets be careful of the Mods).
Here's a link: OB1 Multi-Purpose Sealant & Adhesive Black 290ml

no personal interest etc.

I think you will find that it is a similar type of co-polymer sealant to CT1 , Stixall and many others

 

[Lightwave395]

I'm about to use it to refurb my Lewmar Ocean Hatch

 

[Bertie1972]

The thing with OB1 is that if you strike it down, it only becomes stronger.

This is not the sealant you are looking for...

 

[V1701]

I use CT1 a lot, this looks worth a try as a few quid cheaper...

 

[Rappey]

A brand has a sealant , for wood, plastic, ceramics, masonary etc, then they have a sealant that does everything? Does that even make sense?
Multi purpose, sticks to wet, sounds like another hybrid ms polymer sealant.. Sika do one at £2.99 and its ok, but they are really hard to squeeze out of the tube ! They dont work under water that well.
Dow corning is one manufacturer where each tube does what it says. The glass sealant is impossible to remove from glass when set..
Basically if you can peel it off when set its not sticking !
The biggest failure of people using silicones and similar is not using it properly ! The tubes dont tell you how.
Sticking windows in with sikaflex or ms polymer or any other adhesive is not the correct way to go. A silicon sealant (rubbery) is for sealing, adhesive selants are for glueing.

 

[SAMYL]

Thanks to Brexit the manufacturers of CT1 in Northern Ireland have moved production of CT1 to Latvia or Lituania or thereabouts.
The workers in the old CT1 factory have decided to continue producing the product, with some additional ingredients to improve it, and are now marketing it as OB1 but currently it is only available through Screwfix. As production increases it will become more readily available.
CT1 may still be available but is now an import whereas OB1 is made in UK and is now an improved product.
I know which one I will be buying in future.

 

[CTEC_NI_Limited]

Thanks to Brexit the manufacturers of CT1 in Northern Ireland have moved production of CT1 to Latvia or Lituania or thereabouts.
The workers in the old CT1 factory have decided to continue producing the product, with some additional ingredients to improve it, and are now marketing it as OB1 but currently it is only available through Screwfix. As production increases it will become more readily available.
CT1 may still be available but is now an import whereas OB1 is made in UK and is now an improved product.
I know which one I will be buying in future.

This statement that you have made publicly is malicious, slanderous, without foundation and completely untrue. Unless you retract this immediately, we will be taking legal action against you in the High Court Belfast, where you will be affixed with all costs. We advise to give you this your most urgent attention.

 

[Solent sailer]

i use CT1 a lot at work, a comparison with OB1 would be good. all these products claim to be good for everything and finding out 6 months later that is isnt actualy that good for somthing vital is not always great!

perhaps CTEC_NI_LIMITED could outline the diffrences?

 

[sarabande]

Screwfix (a company for whom I have worked) could not be clearer as to which product they sell.

We don't sell CT1 Adhesive | Screwfix Website

 

[Poignard]

This statement that you have made publicly is malicious, slanderous, without foundation and completely untrue. Unless you retract this immediately, we will be taking legal action against you in the High Court Belfast, where you will be affixed with all costs. We advise to give you this your most urgent attention.

You'd do well to get a new lawyer, one who knows the law.

 

[Bobc]

CT1 is an adhesive and sets like concrete. This stuff supposedly never goes hard and is an alternative to Butyl or silicone. Sounds useful for deck fittings and hatches.

 

[Poignard]

CT1 is an adhesive and sets like concrete. This stuff supposedly never goes hard and is an alternative to Butyl or silicone. Sounds useful for deck fittings and hatches.

It's interesting that you should find that.

CT1 I used 5 years ago is still flexible.

 

[Mistroma]

It's interesting that you should find that.

CT1 I used 5 years ago is still flexible.

I haven't used it but that's what the specification led me to believe. I was considering OB1 and had a look around for the specification. One odd thing was that I couldn't find any details about the manufacturer, only mention of the formulation being in use for over 15 years made by a private company. Perhaps I missed something. Odd, is it possible that there's some sort of legal constraint on mentioning the manufacturer? Any thoughts.

 

[Poignard]

I haven't used it but that's what the specification led me to believe. I was considering OB1 and had a look around for the specification. One odd thing was that I couldn't find any details about the manufacturer, only mention of the formulation being in use for over 15 years made by a private company. Perhaps I missed something. Odd, is it possible that there's some sort of legal constraint on mentioning the manufacturer? Any thoughts.

I'm afraid I don't know anything about OB1.

I have been entirely satisfied with CT1, which is readily available and not expensive, so I haven't thought about using anything else.

 

[Solent sailer]

I use CT1 in preference to silicon as it sticks much better and clear really is clear, always found it to be flexable and remain flexable.
One plumber I spoke to uses it for shower trays as it dosent pull off the tiles in a couple of years as silicon does.

 

[fredrussell]

Is CT1 not silicone based? I thought it was.

 

[vyv_cox]

Is CT1 not silicone based? I thought it was.

It's a hybrid polymer. The CT1 MSDS sheet says Contains N-(3-(trimethoxysilyl)propyl)ethylenediamine, dioctyltinbis(acetylacetonate), N-[3-(dimethoxymethylsilyl)propyl]ethylenediamine.

OB1 MSDS says Contains N-[3-(dimethoxymethylsilyl)propyl]ethylenediamine, N-(3-(trimethoxysilyl)propyl)ethylenediamine, dioctyltinbis(acetylacetonate)

DOW Corning clear silicone MSDS sheet says: Triacetoxy(ethyl)silane, Methyltriacetoxysilane

The coloured and clear versions differ: I have not checked them all.

All contain at least some Si but to my untutored eye the hybrids look more complex.