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Question.
What is the lowest temperature at which solvent-borne
coatings can be applied?
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answer
Answer.
It is not recommended to apply solvent-borne coatings when the
temperature is likely to drop below 5°C during application
and drying.
Question.
What is the lowest temperature at which water-borne woodstains
can be applied?
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answer
Answer.
It is not recommended to apply water-borne coatings when the
temperature is likely to drop below 8°C during application
and drying.
Question.
Are there special requirements for the application of
water-borne coatings on timber substrates?
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answer
Answer.
Water-borne coatings for wood are quicker drying and have different
flow/levelling characteristics to traditional alkyd based (solvent-borne)
coatings. It therefore recommended to use brushes designed for
the application of water-borne coatings, and not to apply in
extremes of hot or cold conditions.
Question.
Can water-borne coatings on wood be recoated with solvent-borne
ones, or vice versa?
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answer
Answer.
A water-borne coating is generally more flexible than a solvent-borne
one, and the general rule if in any doubt, is "Preferably
recoat water-borne with water-borne". Provided, however,
that the existing finish is sound and fully dry, there is no
problem with overcoating solvent-borne with water-borne or water-borne
with solvent-borne.
Question.
I’ve heard that Western Red Cedar can be difficult
to coat, can I use your woodstains on some new cladding?
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answer
Answer.
A two coat system of Sadolin Supercoat is suitable as a durable
treatment of Western Red Cedar. Alternatively, for a lower sheen
finish, three coats of Sadolin Classic would be appropriate.
Question.
I have used another woodstain in the past, can I now
use Sadolin to redecorate?
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answer
Answer.
Providing the surface is sound, there will be no problems in
applying these woodstains. Any peeling or flaking areas must
be removed, and any bare timber thoroughly sanded back to clean,
bright wood. Bare areas should be patch primed with a basestain
such as Sadolin Classic to even up the colour, and then one
or two coats of Sadolin Extra can be applied.
Question.
How much woodstain will I need to treat my windows and
doors?
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answer
Answer.
On average, every litre of woodstain will give two coats, indoors
and out, on two partly glazed doors or four windows.
Question.
How do I remove any spillage?
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answer
Answer.
Care should be taken to avoid spillages on to glass, cement,
brickwork, carpets, clothing etc. If spilled, the solvent-borne
coatings should be removed immediately while wet using white
spirit. Water-borne coatings should be removed using a warm
detergent solution. Once dry, the coatings will be very difficult
to remove without damage to the surface.
Question.
What is the difference between a high solids, low solvent
woodstain and a traditional solvent-borne coating?
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answer
Answer.
High solids coatings differ from conventional stains on the
following points: Lower emission of volatile organic compounds
VOCs); greater absorption/penetration into the timber surface,
giving improved adhesion; greater flexibility to cope with timber
movement; slower initial drying giving a longer open time and
better flow/levelling characteristics; superior protection with
the application of two coats instead of three.
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