Material guide
Gluing EPS (polystyrene foam)
White bead foam used for packaging, insulation board and model making.
Also called beadboard, EPS, expanded polystyrene, packing foam, Styrofoam.
How EPS (polystyrene foam) behaves when you bond it
Dissolved instantly by solvent-based adhesives, which is the single most common mistake made with it. Water-based and solvent-free products marked as polystyrene-safe are the only reliable route.
EPS is a rigid bead foam made from expanded polystyrene. The bead surface is solvent-sensitive and the material has low cohesive and peel strength, so a bond may remain attached while tearing beads from the panel.
Material properties
- Surface energy
- Medium
- Porosity
- Semi-porous
- Rigidity
- Rigid
- Maximum service temperature
- 70C
- Normally needs abrading
- No
- Normally needs a primer
- No
- Solvent sensitive
- Yes. Solvent-based adhesives can craze or dissolve the surface.
- Solvent to avoid
- Solvent-based all-purpose adhesive (3M states that solvent-based all-purpose adhesive dissolves rigid polystyrene foam.) Manufacturer verified
Surface preparation
Brush or vacuum loose beads and dust without crushing the face. 3M warns that solvent-based all-purpose adhesives dissolve rigid polystyrene foam; use a foam-safe dispersion, low-melt or other product whose data sheet names EPS. Apply broadly and press lightly to spread load.
Which adhesives work on EPS (polystyrene foam)
Good
Grab adhesive, no-nails
Grab adhesive, no-nails is rated good for this material as an application-level assessment, not as a blanket manufacturer claim. Suitability still depends on the other substrate, joint design and service environment.
Good
Spray adhesive
Spray adhesive is rated good for this material as an application-level assessment, not as a blanket manufacturer claim. Suitability still depends on the other substrate, joint design and service environment.
Conditional
Hot melt, hot glue
Hot melt, hot glue is rated conditional for this material as an application-level assessment, not as a blanket manufacturer claim. Use only after a product-specific test on the actual grade and joint.
Bonding EPS (polystyrene foam) to something else
Stainless steel to EPS (polystyrene foam)
Powder coated metal to EPS (polystyrene foam)
Painted metal to EPS (polystyrene foam)
Mild steel to EPS (polystyrene foam)
Galvanised steel to EPS (polystyrene foam)
Copper to EPS (polystyrene foam)
Chrome plated metal to EPS (polystyrene foam)
Cast iron to EPS (polystyrene foam)
Brass to EPS (polystyrene foam)
Anodised aluminium to EPS (polystyrene foam)
Aluminium to EPS (polystyrene foam)
Plywood to EPS (polystyrene foam)
Last reviewed 8 October 2026.