Triple-Reinforced Burial Vault PREMIUM PROTECTION The Wilbert Bronze ® The Wilbert Bronze® is a meticulously engineered, handcrafted burial vault, the quality of which has never been duplicated. It is the only Wilbert® triple-reinforced burial vault. The Wilbert Bronze features a contemporary design constructed of ultra high-strength concrete reinforced with high-impact ABS Trilon® interior, a Bronze metal liner and ABS Marbelon® exterior. The cover is completely incased in bronze with solid die cast nameplate on the carapace. It is the strongest and finest Wilbert burial vault.