株式会社エーアンドエーマテリアル manufactures Keicalite (ケイカライト) lightweight calcium-silicate steel fireproofing boards, FG Board and FP Hi-Rack non-combustible boards and Tunnelite tunnel fire protection. Its steel-encasement products carry 国土交通大臣認定 approvals for 耐火構造 and 不燃材料, and the company is named on the Rock Wool Association’s individual-certification register for 吹付けロックウール耐火被覆. Its wholly owned contracting arm A&A Crest carries out 耐火被覆工事 under approvals issued in its own name.