Hi all, just got an order for a parish notice board with 3 glass doors to be made from Iroko. Have used in the past an exterior spirit based varnish but with all these oils around these days was wondering if they would be suitable for such a project. What i have used in the past all ways breaks down after many months and as i will not be their to take on any after care would like a product that will last. Any suggestions ?
Varnish or Oil for village notice board
- Thread starter sawdust1
- Start date
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adidat
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whiskywill
Established Member
adidat":2gemc7r1 said:
Don't they need a UV barrier such as a two part linear polyurethane varnish?
Dodge
Established Member
Exterior grade acid cat lacquer is very durable - used it on an oak notice board about three years ago and it still looks like new!
JonnyD
Established Member
Dodge":top7xgri said:
Do you have a link to the product you used Roger I've never come across it before?
Cheers
Jon
Dodge
Established Member
This is what I used.
http://www.symphonycoatings.co.uk/produ ... roduct-84/
It is listed as an internal finish but the rep advised that it is suitable for external purposes too and gives a rock hard durable finish.
http://www.symphonycoatings.co.uk/produ ... roduct-84/
It is listed as an internal finish but the rep advised that it is suitable for external purposes too and gives a rock hard durable finish.
Woodfinish Man
Established Member
The rep suggested that for exterior application?
I would seriously disagree with that. AC lacquer is a brittle product and in our opinion is not flexible enough for exterior applications. It's one of the most popular lacquers for internal applications but externally it will crack and blister then the rain will get in under it and start turning it black.
The best exterior finish we've found is Osmo UV protection Oil Clear, it will allow the timber to expand and contract.
Iroko is such a difficult product to protect due to it's high oil content but an oil would be better than a surface coating such as Polyurethane Varnish.
Hope this helps...still can't get over a sales rep suggesting AC for outside use! Never heard that in 20 years of working here.
I would seriously disagree with that. AC lacquer is a brittle product and in our opinion is not flexible enough for exterior applications. It's one of the most popular lacquers for internal applications but externally it will crack and blister then the rain will get in under it and start turning it black.
The best exterior finish we've found is Osmo UV protection Oil Clear, it will allow the timber to expand and contract.
Iroko is such a difficult product to protect due to it's high oil content but an oil would be better than a surface coating such as Polyurethane Varnish.
Hope this helps...still can't get over a sales rep suggesting AC for outside use! Never heard that in 20 years of working here.
tekno.mage
Established Member
I'd agree with the Osmo UV protection oil for exterior work. It has the benefit that it can easily be "refreshed" every couple of years or so with another coat without having to remove any flaking or cracked old surface.
