At last. A d-i-y thread:-)

Has anyone come across building grade gun or can expanding foam in
black?

My house is partly clad in black painted feather edge board nailed to
vertical battens. Poor original fitting, warping and shrinkage has led
to occasional gaps where the ends meet the undertile (verge?)

This allows space for uninvited guests:-(

Googling turns up lots of foam manufacturers/suppliers but apart from
red for fire rating and black for pond/gardening nothing so far for
normal building applications. Can the pond stuff be used?

With Sun exposure and Sadolin painted boards it needs UV proofing and to
resist future re-decoration. Also high ratio of closed cells for water
proofing.

Paint it? Only needed for small patches and I'm trying to avoid major
outdoor decorating jobs this late in the season.
--
Tim Lamb