"Best material to prevent warping" Topic

What do you all use to prevent warping?

I'm trying to make some rivers using either cloth or a rubbery craft foam I found at Hobby Lobby. I'll be using acrylic caulk for my base along with paint and some sort of gloss to get a water effect.

I've read somewhere that duck tape works, but I'd be interested to see if there are better alternatives out there.

Thanks

why not just use latex caulk?

A little too messy on just one side, but something to consider if I can't find another way.

I want to say I read somewhere that packaging tape also works as it's not stretchy like duck tape.

Warping is why I don't like cloth or foam, or even chipboard or MDF or other wood products.

I make fields and forest floors out of cloth, because I need them to conform to elevation changes like hills and valleys, but sheet styrene or sheet metal make better bases for water bodies, because they don't warp and lie flat on the lowest part of the table.

FWIW, the cheapest rivers I ever made were elongated blobs of acetate painted on the underside. They look awful standing alone, but when properly worked into a table full of terrain pieces with bushy scatter terrain lining the banks, they look pretty good, and reflect light like water should.

If you're looking for cheap rivers, Yellow Admiral's acetate blobs are hard to beat. The hardest part is finding everhead projector slides nowadays.

To solve warping just clap it down or weight it down with bags of sand.

Monday Knight miniatures make some nice cheap latex rivers. The ones I have are about 2 inches across, lay flat. Can't recall off hand but at least 2 feet long

The Monday Knight rivers are expensive, look awful, and are cast in a latex that doesn't hold paint, so you can't improve them. I recommend against them.

I'd buy some if I could alter the color of the banks and water to look less cartoonish, but my experiments to paint and glue on Monday Knight roads have all failed, so I gave up on that idea. I can make better looking rivers for a lot less money.

I have some old Scenic Effects latex rivers that I've been using for about 20+ years which were made from the exact same molds as the Monday Knight rivers. They look reasonably nice because they were made with multiple colors of latex (sandy banks, murky/muddy clear water) and are paintable with latex paint. I wish I could buy more.

This scratch-made method using acrylic caulk hot glued to felt seems to work reasonably well, at least for 6mm scale boards.

YouTube link

Here is a larger scale version using caulk and paint on canvas, YouTube link

For my table, I created a decent set of rivers out of inch wide strips of blue felt painted with cheap acrylics to create the illusion of a flowing river and banks, and finished with Modge Podge on the water portions to make it glossy and wet looking.

For 25mm scale, I bought a nice set of urethane rubber rivers from Novus Design Studios:

link

The catalog currently only shows their toxic (green) river, but they also do blue and frequently offer sets on Ebay.

Thanks Chris….I think I might just go with the blue rubbery foam I bought and use mod podge. It looks like it won't warp from the paint or the mod podge.

Thank you all for your comments

Red Beard Baron on Youtube has a video on this. Great terrain guy! Latex caulk on canvas. Then Duct tape on bottom of canvas to prevent warping. Best I have seen!