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post #1 of 6 Old 06-30-2011, 02:24 PM Thread Starter
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Varnish

what is the best UK available external varnish for protecting south facing oak garage doors which won't peel off, totally seal the wood, discolour, and not need renewing annually??
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post #2 of 6 Old 06-30-2011, 06:07 PM
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Originally Posted by The Onanist View Post
what is the best UK available external varnish for protecting south facing oak garage doors which won't peel off, totally seal the wood, discolour, and not need renewing annually??
IMO there isn't any. All film finishes used outside in the elements will fail. Some sooner...some later. Some of the very expensive spar varnishes and urethanes will last a while, but they too will fail. Those finishes are a PITA to refurbish and to keep looking good over time.

A pure oil like 100% pure Tung oil, or a product like Penofin would be my choice.








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post #3 of 6 Old 06-30-2011, 06:11 PM
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Marine Spar varnish formulations are typically a mix of oil, resin, solvent, dryers and ultra-violet additives. These ingredients keep wood at optimum functionality.

Iím not familiar with what is available in the UK, but a spar varnish that is designed for boats is probably the best you can get. If you prepare the surface properly and apply the varnish in 3-4 coats, thatís the best you can do. Depending on the weather, there may not be a varnish that will last as long as you want. House paints might be better, but look like paint.
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post #4 of 6 Old 07-04-2011, 09:32 PM
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Another route you can go is with oil-based clear house paint--that is to say a deep color base designed for tinting (usually #4).
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post #5 of 6 Old 07-05-2011, 12:07 AM
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sikkins cetol is the best oil finish for a garage door. then next would be penofin. any poly/varnish will fail in time. if you allready have a poly/varnish on now your stuck unless you completely strip. i like man-o-war spar varnish for exteriors. it has done me well.
if painting is done do with a semi gloss and not flat. flat will give no protection to the elements. use a latex not oil, oil hardens and will not flex with the door. oil becomes brittle.

Last edited by jack warner; 07-05-2011 at 09:33 AM.
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post #6 of 6 Old 07-05-2011, 06:06 AM
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Yep , as has been said , there is no product that fits your specifications , apart from Nothingatall .
Leave the oak bare and let it age to a natural gray finish
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