Abstract: A multi-layer composition to be located onto a substrate. The composition comprises a bi-layer construction, including a first layer and a second layer, the first layer having a high elastic modulus and tensile strength in comparison to the second layer. The second layer includes a blowing agent such that, when cured, the first layer is spaced away from the substrate. The compositions of the first layer and second layer are similar, thus enabling the reconstitution of scrap into usable material for forming another multi-layer reinforcement.

Abstract: The present teachings generally provide for a reinforcing patch for stiffening vehicle panels. The reinforcing patch may be fabric free (e.g., free of any reinforcing layer). The reinforcing patch may be cut into small shapes, complex shapes, or both. The stiffening material may be free of a mesh or a fabric, which may allow the reinforcing patch material to be easily produced and easily reprocessed. The reinforcing patch may include one or more reinforcing particulates in combination with one or more discontinuous fiber components to obtain stiffness comparable to traditional patches which include a mesh/fabric layer.

Abstract: A reinforcing device comprising a composite reinforcing patch including a first layer comprising a first activatable material that is flexible and tacky in its green state prior to activation, a second layer comprising a stabilizing material selected from a mesh, a film, a chemical coating, a fibrous or spherical material, or a second activatable material located in planar contact with the activatable material and along the entirety of a first surface of the activatable material, and an optional third layer comprising a mesh, a film, a chemical coating, second activatable material, or a release paper located in planar contact with the activatable material and along the entirety of a surface of the first layer or second layer, wherein upon activation of the activatable material, the presence of the second layer, the optional third layer, or both provides dimensional stability to the activatable material and minimizes shrinking of the activatable material.