Exterior Sign Questions

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Forum topic by rtbrmb posted 10-07-2014 06:38 PM 1096 views 0 times favorited 3 replies Add to Favorites Watch
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621 posts in 2352 days

10-07-2014 06:38 PM

Topic tags/keywords: cnc exterior sign pine

I want to use my CNC router to make an address sign for a coworker & was looking for some advice. I don’t have a lot of experience working on projects that are for outdoor use.

I plan on using edge glued pine boards to get the desired width I want – I am assuming TiteBond III is acceptable, or is there a better choice?

I will be painting the finish but is there also a clear coat that I should apply over the paint to assure maximum protection from sun/Michigan winter conditions?

Thanks in advance for all those that respond.

Bill in MI

3 replies so far

View ChrisK's profile


1942 posts in 3045 days

#1 posted 10-07-2014 07:05 PM

TiteBond III is water proof. You might want to biscuit or spline the joints as well.

Use an exterior latex paint and you can cover with exterior polyurethane or a two part exterior epoxy. You will need to let the latex dry for a week or two before covering with either. I learned the heard way that the moisture in the paint will blister the poly or epoxy. Either top coat need UV inhibitors.

-- Chris K

View Ger21's profile


1074 posts in 3095 days

#2 posted 10-08-2014 01:09 AM

Good quality exterior latex paint is all you need.

-- Gerry,

View oldnovice's profile


6757 posts in 3331 days

#3 posted 11-01-2014 12:22 AM

Another option is HDU, high density urethane, which is easier to machine and suitable for exterior signs!

If you Google “HDU panels” you will find many sources for this material.

You will also find many examples of videos of CNC sign making with HDU!

-- "I never met a board I didn't like!"

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