mbinsewiI'd be carefull with the Dow spray 77. I use it when making trees, and I have the "trunks" stuck into a peice of blue or pink foam board, and the glue will distort/attack the foam. I think any type of solvent based adhesive will attack the foam.
Yes, care must be taken with 77. However, if left "open" for a couple of minutes, the solvent largely evaporates, leaving the sticky stuff. I've had no significant problems shooting it on styrene sheet. Don't spray it directly on foam, however, rather apply the "aired out" app of it on the styrene sheet to the foam.
Mike Lehman
Urbana, IL
I have used the plastic friendly version of Liquid Nails for something like this. It is available in toothpase tube size containers, Liquid Nails for Small Projects. It is white, the brown, original Liquid Nails will melt foam
George In Midcoast Maine, 'bout halfway up the Rockland branch
No mention of Hot Glue. Easy,quick set time (versus latex caulking) and affordable.
Have been using hot glue for decades in HO. From custom made vehicles to compressed BOF's.
I suggest using an Arrow brand hot glue gun. Had mine for ten years,still kicking.
Hope this helps.
Fear an Ignorant Man more than a Lion- Turkish proverb
Modeling an ficticious HO scale intergrated Scrap Yard & Steel Mill Melt Shop.
Southland Industrial Railway or S.I.R for short. Enterchanging with Norfolk Southern.
At my age, 40 tears should be plenty !!
jerry,
I'm a big fan of this stuff:
You can pick it up at your local home improvement store for <$2.50 a tube. It comes in a variety of colors and holds VERY well. I've used it to adhere foam -> foam, cork -> foam, track -> foam, track -> cork, and cork -> cork.
Working time is ~45 min. 8 hours is generally sufficient for curing but I like to let it go 24 hours for the best hold. If you do need to make a correction for some reason then it can be persuaded to come up with a firm, slow, and steady putty knife. Great stuff!
Tom
https://tstage9.wixsite.com/nyc-modeling
Time...It marches on...without ever turning around to see if anyone is even keeping in step.
LePages makes a specific adhesive for use with extruded foam, known as Lepages PL 300 Foamboard Adhesive.
You'll need a caulking gun to use it, and need to read the instructions if you want it to work properly.
In the photo below, the elevated track just to the left of the leaning standpipe is on blue extruded foam, affixed to the plywood layout-top on the upper level of my layout. After the adhesive had set for the specified time, I used a Surform to shape the blocks of foam, then painted them with dirt-coloured latex housepaint....
...there'll be ballast, some retaining walls and other details added to complete the scene.
Wayne
I'd go with Richards advise. The Gorilla Glue does expand, and if the styrene sheet isn't weighted down, it will lift up, as the glue expands.
I'd be carefull with the Dow spray 77. I use it when making trees, and I have the "trunks" stuck into a peice of blue or pink foam board, and the glue will distort/attack the foam.
I think any type of solvent based adhesive will attack the foam.
Mike.
My You Tube
There is a foam and plastic safe gorilla glue. It's super strong and you'll never get it apart. For that reason as well as it expands when it dries I don't really like it.
There is a caulk/adhesive available at Menards, 2 in 1 polyseamseal. The stuff's nasty it hasn't failed me yet. Easy to work with it comes in a hand squeeze tube.
Applications like this can vary widely in terms of what's needed., so these are just suggestions. Aleene's Tacky Glue dries flexible, which is needed because of the dissimilar expansion rates of these materials. Tacky Glue won't affect either, and is non-toxic. It is affected by moisture after setting.
3M Super 77 is solvent based spray contact cement. However, it is very limited in terms of ots effects on plastics. It only needs to be applied to one surface and can be left "open" before final placement of the applied piece to further limit this. This will likely work in manyappliucations similar to yours.
Hello all,
I second latex caulk.
"Uhh...I didn’t know it was 'impossible' I just made it work...sorry"
I've never had any luck with white glue on styrene altho it would work well on the foam.
I've not tried it but I don't see why white glue wouldn't work. It might take a while to dry.
I am more certain caulk would work, but I would apply minute amounts, because a big thick bead is hard to spread out as thin as you might need.
Henry
COB Potomac & Northern
Shenandoah Valley
I would try latex caulk. I've had good luck using it for several applications. I can't think of one where I attached styrene, but it won't hurt either surface, Might want to rough up the surface of the styrene if it is very smooth.
Good luck,
Richard
Want to glue some styrene cobble stone sheets to pink foam board. I would like to use contact cement,but it would attact the foam. Seems the styrene & the foam really need their special kind of glue. Is there anything that would work on both materials that would hold permanently ? thanks