Hi Brett,
I've been using foam for quite some time. As a matter of fact I usually do a workshop on different types of foam and how you can use them at our state conference.
Here's my disclaimer: You'll find a ton of different opinions. I'm posting what I've found works for me. I'm not saying I'm an expert. Just experienced through a lot of trial and error.
First of all, for attaching it to a sheet of luann or another sheet of foam, I've found "Bonding Primer" from Home Depot works the best. It's a little pricey but since it's a paint you can just cover the entire surface and place them together. You should put pressure on them for a few hours until the paint dried but you will not be able to take them apart after that. If you're looking for something a little less drastic I sometimes use Quick Grab construction adhesive. Works well for me.
We paint right over the surface. I mostly use foam for texture like brick walls or stone. Or anything that has depth to it like giant scallop shells. So I've never really had to much of an issue with the seams once they're painted. If they're too noticeable I would just use a little paintable caulk and smooth it flat.
Hope this helps. If you have any other questions, feel free to send me a message and I'll hopefully be able to help.
Good Luck!
------------------------------
Chuck Yarmey
Advisor/Technical Director
Wyoming Area Drama Club
Thespian Troupe 4795
Exeter PA
------------------------------
Original Message:
Sent: 10-08-2018 08:31
From: Brett Buffum
Subject: Foam Set Pieces Help
I'm venturing into foam sheets for set pieces for the first time and have a couple of questions for those that have worked with it more.
I am not needing to glue/layer sheets on top of each other, but will be laying sheets out next to each other. I will be securing them to existing wall units for backing and support.
- What's the best product/method to fill the seams in-between the sheets?
- What's the best product to adhere the edges of sheets together to make a solid, continuous sheet when needed? I've heard people use spray foam but also the 3M Super 77 Contact Adhesive.
- Before painting, do you seal the sheets? I'm using the purple board from Home Depot that seems to have a pretty solid surface already. If you use a sealer what is the easiest/best?
Thank you for helping out a foam-noob.
------------------------------
Brett Buffum
Theatre Teacher
Spring Hill KS
------------------------------