foam glue

Water-activated polyurethane adhesives expand into porous materials (often to roughly three times their applied volume). Surfaces should be lightly dampened before application. After applying, clamp the joint with even pressure for about 1–2 hours and allow roughly 24 hours for a full cure.

Initial set or clamping time is typically about 1–2 hours. Manufacturers generally advise allowing around 24 hours for the adhesive to reach a full cure.

Glue sticks and similar craft adhesives adhere well to common craft materials such as paper, cardboard, foam board, fabric, photos and glass, plus other typical craft surfaces.

Many foam-capable adhesives are formulated to bond to surfaces like wood, stone, metal, ceramic, glass and concrete. Several products also list foam itself as a compatible substrate.

Feather-light iron-on fusible adhesives are intended for very lightweight sewable bonds—such as multi-layered appliqués, quilting and wearable arts. They activate at low heat and are described as machine washable.

Prepare surfaces by cleaning and removing dust, and roughen glossy materials. Ensure tight-fitting joints. Lightly dampen one surface (or both for dense hardwoods), apply glue to the dry surface, then clamp evenly for 1–2 hours. Allow up to 24 hours for a full cure.