Document 4a88gvnNBq8qbQrnxvzxdB6Rj

( l L Specifications (iiiiriii IVovImIiiii - rr<>in|H>ritl ill'll ami vent Mill ion ronilii hunt required liy General I'lnrtlering .Suefificiilinim hIimII ti| |>Iv. I Snii|in--nri'iiM indicated in liuiMli nrhedule hIiiiII lie liiimhcd willi iii*otiH( it'll I planter iih di-Hrrihcd hereiit. Mnlcrinli* -- lininll i miiI nrmiHl irul plnaler hIiiiII he 111 -1 -III (alipplc nr Ntippli'-|H-rlnrulfd liiiinlil liamulm'l meil liv llm United SlntcH t v|IMIIlit Ginupiinv. ('nlnr hIiiiII lie while. Mixing and Application of IIi-Litk and the Ikisc-cimI pl.-tater nIiiiII lie in slricl. .ncnnlnnee with the niumifneturcrV printed direel inns whieli nre hereby iniide n purl nl this S|M-eifienl inn. New White HI-LITE Acoustical Plaster stipple or stipple-perforated finish MIXING--Mnchine mixing ia required. Do not relcmjx-r or mix one batch with nnother. Keep all tools and equip ment clean. Mix no more than can be used in one hour. Hi-Lite Acoustical Plaster Rasecoat: Use approx imately 34 quarts of water per bog. Add Hi-Litk Masecoat to water and mix until mortar wcighti 15 to 17 lbs. net per 12 qt. pail. (Approximately 10 to 15 minutes depending on speed of mixer,) < - Hi-Lite Acoustical Plaster .Finish Coat: Uso ap proximately 32 quarts of water per bag. Add-Hi-Litk Finish Coat to water and mix until mortar weighs 15 to 17 lbs. net per 12 qt. pail. (Approximately 6 to 12 minutes depending on speed of mixer.> * APPLICATION -- Hi-Lite Acoustical Plaster shall laapplied in two coats to a uniform total thickness of over a basccoat of RketTop* Gypsum Plaster. A full scratch and brown coat that has been cross-raked is required over metal lath, Kocklath* Plaster Hnse and masonry liases I not monolithic concrete) to pro vide proper rigidity, strength, and a solid base for the acoustical plaster. liu.sivunt: Apply the first coat of Hj-1,itk Acoustical Planter Hasecont ' thick, by scratching in nnd doubling back over a net, dry or partially dry bane- cont. Darby lightly to it level surface Finish Coo/; Apply finish coat 1 ** thick to not, wot or partially dry Ul-ljTK Ibisecoat, scratching in and doubling hack, leaving surface free of trowel murks, working from wet edge to avoid joinings. When sur face gloss has disappeared, stipple the surface with a rice stippling brush to a uniform texture. For a stipple-perforated finish, perforate when surface in firm enough lo retain dean nnd open perforations, usually dO minutes after stippling or at any time thereafter before surface in drv. Use a perforator fur nished by I hr United Staten Gypsum Company. Per forations should number approximately fiOO per square foot nnd should lx at leant deep. CAUTION -- Protect planter from moisture while in storage. During and after application furnish proper heat nnd adequate ventilation. HI-LITE Acoustical Plaster {Sound absorption data) Thickn. Stippled StlppU-Pnrforafnd Stlpplo-Porforotod Zi' Vi' Thlcknati '/]' . NRC .22 .25 .47 .72 .78 .80 .55 .20 .24 .48 .77 84 .86 .60 Frequency 125 250 500 1000 2000 4000 NRC .20 .24 .50 .76 .83 .76 .60 Authority Nal'l Bur. of fli Not'l Bur. of Sl'dt. Authority Rivarbank Laboratory Direct application of HI-LITE Acoustical Plaster to existing ceilings or concrete Hi-Litk may he applied over existing plaster and over new or existing smooth concrete ceding with the use of asphalt emulsion (Type N-13 HPC or C-13 HPO as a bonding agent. ' On existing painted plaster or concrete ceilings, the surface must be dry, clean and sound. Calcimine or similar powder paints must be washed off and wax. grease or oil removed. Loose or improperly bonded plaster or paint must lie removed and such areas re paired with wood fiber or patching plaster. Allow patches to dry 2 or 3 days. On new concrete ceilings which are smooth, level, and dense, surface must be dry, free of dust, oil, grease, or efflorescence. Size any porous concrete, or porous or unpainted plaster surface with cut-back asphalt, shellac, or varnish to reduce suction before asphalt emulsion is applied. Trowel on asphalt emulsion in thin coat not to exceed Lo" thick. Cover entire ceiling area. The first ? of Hi-Litk should follow application of the emul sion as closely as possible and while the emulsion is still suft and plastic. Darby first eoat of Hi-Lite to a true even surface with a minimum amount of pressure. Allow to set nnd partially dry. Apply IIi-Litk finish coat as specified. Application of HI-LITE Acoustical Plaster over monolithic concrete surfaces Over properly prepared rough monolithic concrete surface apply Bonoc'IIKT'E* plaster according to direc tions and not to exceed \4" thickness on ceilings nor In on skit? walls. Apply the Hi-Tjtk ovt-r the set, partially dry j*oniickktk basecuat, as specified above. Directions for painting HI-LITE Acoustical Plaster Remove all loose dirt or dust from Hi-Lite by use of h vacuum cleaner with hose and brush attachment. Paint: Should be water-thinned. Texolite* Im perial is recommended. First coat -- mix one part Tkxolite paste to one part water by volume. Second coat if required --mix one part Texoljte paste to tux> parts water by volume. Spray on with any gun with a medium fine sprav. DeVilbiss spray gun, type MUD, with a No. .10 T. M. t*9. U. 5. fat. on. nozzle or equivalent is recommended. Use .10 to JO lbs. pressure in the gun and L!0 to dO lbs. on the paint. Mold nozzle 11 to IS in. away from work. Use a slow, uniform motion, ('over surface in one pass. Dc not pass over same area several times as this builds up paint unnecessarily. Allow at least overnight drying between cunts. If weather is extremely humid, allow additional drying as necessary. Cop7"9M 1953, uruled Sioin Gtpiwm Co. UNITED STATES GYPSUM The Greatest Name in Building rTnrm *>Z l \ 0*?0d9