Repair end checks in cedar clapboards?

PeteKelly

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Jul 29, 2015
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Does anybody have a suggestion on the best way to fill/repair these splits in the end of cedar clapboards?

I am prepping and painting the outside of a 1952 Cape. For hairline cracks I use caulk. For cracks/holes/gouges larger than about 1/4 inch I use Flex-Tec HV two-part epoxy made by Advanced Repair Technology, which is supposed to be flexible.

But for the narrow splits shown in the attached picture, about 1/16" - 3/32", I don't know what to use that will (1) fill the gap without eventually shrinking, (2) help adhere the two sides of the split to each other, and (3) be a little flexible.

Most of the splits go all the way through the clapboard. The splits will not press back together.

I would use the Flex-Tec except they say in the instructions to dilate cracks to 1/4 inch, which doesn't work with these narrower cracks.

The eventual paint will be oil primer and two coats of latex.

View attachment 1

Thank you,
Pete
 

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