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<br />Company <br />W. R. Bonsal Company <br />W. R. Grace b Company <br />Western Chemical 8 Mfg. Co. <br />Zonol#te Construction Products Division <br />Trade Name <br />Surewall <br />Zonolite Mine Sealant <br />Fire-Guard BM <br />Mine-Guard <br />S1'AK=N-BOND <br />1/ liquid additive to Portland cement-sand mistures to improve adhesion <br />and water-proofing. <br />r <br />l~ <br />,• <br />-14- <br />