Half a gallon of wood glue, a pile of random, scattered resistors, or in [Ken]’s case, closed-cell silicone foam. Wanting to avoid this situation he set about trying to make his own silicone ...

You can cut the foam to shape with a utility knife that has an extendable, snap-off blade. For glue, one good choice is Titebond III Ultimate Wood Glue ($7.48 for an 8-ounce bottle at Home Depot).

Fabric glue is usually designed to help fabric pieces ... This clear, drip-free spray effortlessly binds upholstery and carpet materials to wood, foam, metal, plastic, cardboard, and more.