WISPER is an exterior grade polymer mixture, which when mixed and applied correctly, creates an excellent slippery surface barrier to prevent roosting bats, swallow’s mud nests, and other various wildlife from areas on structures. The most common application spots are covered areas under soffits, eaves, awnings, and overhangs. Surfaces include log siding, vinyl, stucco, EIFS, brick, metal, Hardie siding, concrete, downspouts, plastic, and cinder blocks. Best results on vertical and angled areas. Raw wood should be sealed or painted prior to application to prevent over soaking. Species include swallows, bats, squirrels, and raccoons with good results. No issues to-date with UV rays, heat, or cold. Product Features Prevents roosting bats, birds and swallow's mud nests. For use under soffits, eaves, awnings and overhangs. Coverage will vary, but estimate up to 40 sq feet for non-porous surfaces. What's Included 1 Resin Bottle 1 Hardener Bottle About 20 ounces of product, once mixed