1. Synonyms for Breakable include delicate, fragile, frail, frangible, brittle, crumbly, flimsy, friable, destructible and insubstantial

2. A low cost, lightweight frangible wing slot seal can be applied to a guidance wing slot of a folding fin aerial rocket or missile, providing a barrier against exposure of internal missile components to external contaminants, while allowing unhindered deployment of missile guidance wings simply by bursting through the seals.