Fibonacci Mosaic box #6: Results of caulk experiment

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Blog entry by BritBoxmaker posted 10-05-2013 12:26 PM 1779 reads 1 time favorited 5 comments Add to Favorites Watch
« Part 5: Further grouting experiments Part 6 of Fibonacci Mosaic box series no next part

Firstly it occurred to me that although I needed a pattern to experiment that it didn’t need to be fancy. To this end I took a scrap of MDF and cut 2 mm slots in it using the table saw blade set low.

Applying the caulk using the gun and fine nozzle was like trying to pass an elephant. Slow and painful. So I decided to use a putty knife to apply it.

This stuff cures by losing water so I expected some shrinkage and because of that didn’t level it off completely.

After a day this was the result.

Shrinkage evident. So sanded back level this is what I had.

It is not hard but flexible even when cured. I spray coated some acrylic finish . This appeared to take well.
Left the piece until today (5 days total) with this result

and the end, sanded off flat

Some further shrinkage. Though I don’t think its an unattractive result. The filler is still elastic. May be a better long term bet given wood movement. We shall see. Thats all.

Be seeing you.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

5 comments so far

View Roman Hrytsak's profile

Roman Hrytsak

639 posts in 1776 days

#1 posted 10-05-2013 01:29 PM

Martyn, thanks for the post. You have given me some ideas for my boot carvings! Thanks!

-- Roman:... FIGHT HUNGER ----- DON'T EAT!

View jap's profile


1243 posts in 1144 days

#2 posted 10-05-2013 01:52 PM

great experiment

-- Joel

View jaykaypur's profile


3754 posts in 1498 days

#3 posted 10-05-2013 05:22 PM

Good experiments and also, good to know!

-- Use it up, Wear it out --------------- Make it do, Or do without!

View Steven Davis's profile

Steven Davis

116 posts in 2005 days

#4 posted 10-06-2013 04:50 PM

Martyn -

Interesting as always. What about a classic wood filler – sawdust and glue, colored to suit?

-- Steven Davis - see me at

View BritBoxmaker's profile


4586 posts in 2127 days

#5 posted 10-06-2013 04:53 PM

Yes, Steven. Another possibility. It might be difficult to get a light colour though, such as white. Darker should be fine though.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

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