filling gaps for a water pour

[deemery]

I've just laid down a -level- plywood subbase for the creek.  But in so doing, I've created gaps between that plywood and the existing scenery.


How should I fill those gaps, given I want to pour "water" (Envirotex or Magic Water).  I was thinking masking tape, then plaster wrap, and finish with a coat of Sculptamold to cover the plywood and fill in up to the existing rock work.  

Thoughts/Suggestions?

dave

[deemery]

I had forgotten how I set up the bridge abutments.  The wood is slightly skewed compared to the stone bridge's abutment, but that's easy to fill (no structural concerns there.)


The back abutments (wood pony truss is the actual bridge here) will need more work.


dave

[labdad]

I have used silicone sealer.
You can do a color or clear.

Gloss medium is good for waves , current

MJinTN

[jbvb]

For the larger gaps, staple window screen to the wood parts, then cover with something glue-based.  I'd use some of my stash of Savogran Wood Putty, but Durhams Water Putty might also do the job. Either can be tinted with dry color or water-based paint.

[jbvb]

Fiberglass window screen is more flexible and can be successfully held down with hot glue, if you prefer.  Contact cement might also work, but I'd test it with a sample of your preferred "water" to make sure it doesn't dissolve anything. I've found Envirotex to be pretty well-behaved, but I've never tried it in contact with styrofoam, for instance.