Document oeyLr86OrrJ3OMZppxbkm3xvE

DIRECTIONS FOR MIXING AND APPLYING /1 . I* ................ * i \ i. . . I'.l.'i;: n ;' *-. ............ f.; t. it If rr ri 7 I * '* ! *} ! mi . acoustical plaster : . | - :;i Tn/:;1 *- i ..... . ............... . ............ ......... . % Sabinite .Acoustical Plaster should not be, applied without the approval. of the Company's Service Representative, who is available without cost, ' s PURPOSE ' colors are made to order. Observe the following directions regarding colors: See that the Sabinite which you have ordered is the correct color desired and specified before applying it. Colored Sabinite must be very thoroughly mixed to avoid streaks and discolorations. Sabinitz Acoustical Plasters are made under three for* muJae: Sabi NITS A, which is used for general acoustical plaster work on ceilings or shove wainscots;. Sabinitc B, for troweling to a smooth hard surface that is readily clean* able, and appropriate for use on wainscots or wall surfaces exposed to abrasion; and Sabhiite 38, for use in rooms of high moisture content, such as swimming pools, shower rooms, laundries, etc. All forms of Sabinite are designed to correct acoustics in audience rooms and to- reduce the noise level in otherwise noisy rooms. , ( ^ |iu, ; i. PREPARATION OF BASE FOR SABINITE A AND Bt Apply only to a gypsum base coat, consisting of scratch and brown coats, not less than inch in total thicknees. Do not apply to any other base.. Do not apply to old plaster work of any sort. The brown coat'must be brought to a true and level surface by rodding (to produce uniform color and prevent the use of excess Sabinite). Brown boat shall he thoroughly croaa* raked to receive Sabinite. Sabinite A snd B are applied to gypsum base coat piaaten. Sabinitr 38 is applied only on Portland cement base coat plaater, as described in theae directions. '`/'I YU ti Sabinite it applied on exact,' predetermined area*,' after acoustical analysis of the room has been made. Failure to apply it to specified areas may result in a failure to obtain the desired resuiL Tha plasterer is cautionod not to. reduce the area specified by the architect for Sabinite application without having first obtained in writing Lite approval of the FOR SABINITE No. 381 Apply Sabinite No. 38 to a level, ridded base coat consisting of scratch and brown cnats, not less than ^2 inch in total thickness, of Oriental Stucco Baae Coal Do not apply to any other base. Do oot apply to old piaster work of any sort. 11 . I BASE COAT MUST BE UNIFORMLY DRYi All Sabinlto shall be applied only to a uniformly dry base coat. The base cost should not he artificially dried until it haa thoroughly set and hardened. ......... engineer who made the acoustical analysis, or tha approval of tha architect, and the approval of the Acoustical De MIX1NC partment of tha United Statea Gypsum Company. Sabinite require* only the pddition of clean water to make COLORS it ready for use. Nothing else should be added to it. Tha different Sahinitee should never he mixed together. Sabinite is made in four standard colors and white. Special ' Either machine mixing or hand mixing may be used. ' fO d.lD 03 O o -J o o All mixing equipment must beicept clean ariHTYeA^frtJIH'. FINISHING^ foreign material, especially set plaster of any kind, , r. The finished appenrnnce of Sabinile should be porous, and : -Do not mix more material than can be applied within one hour. ar-r-.i tig~ a* frp r*'_*n fueuamng__m__u_st_ be djo_n__e_ in su.chi a. way_ t.h. at. no w__a_ _ter Use clean water free from alkali knd impurities j, J 0 ;! fglaxT iideveloped on the surface. On targe areas ihe finish Use 27 quarts of water to each 80-lb.1bag of Sahinite. fgoc< must belapplied to each area in one operation. This MIX THOROUGHLY. Mixing should bTcontmueiafter; ^'^^"^kjettionable joining marks, the period when Sabinita reachea'.thi plastic state. {&ddjj fFINISHING 9AB UNITE At Sahinite A may be finished tional mixing increases bulk, plasticity and porosity necea* with a cork float, steel trowel, or whisk-broom. Floating, 3ary for ita_acoustical properties. Mix to regular.sanded-TM troweling or .brooming to a uniform surface must be done plaster consistency. -k * B-.< 5 only after the glaae has left the surface. Use no water in If water tends to separate after mixing, re-mix the water finishing. back into the plaster before using. FINISHING SABINITE Bt Sahinite B is finished with Do not retemper. Do not mix one batch with another. ( a steel .trowel. Trowel up fairly smooth while applying : ! -= ri* APPLICATION Apply only over a uniformly dry -brown coat, which, has .been thoroughly broomed or raked. The brown coat should second coat, then go over the work with a trowel using 'pressure to'develop a smooth, uniform appearing surface. Thri second troweling is done only when the water has dis appeared from the surface.. Use no water`in troweling.' have uniform suction (dryness)^ throughout, or, color will be spotty and muddy. FINISHING SABINITE No-30 Sahinite No. 33 must aiwaya be finished by floating. Do not under any circum Apply in two coats--each 14:inch.'thick, R> a total thickness stances use a trowel in finishing, and never use water in of Ys.,!n?h over the brown.coat.y , . Jlti'f floating. "After the final floating, it may he troweled lightly FIRST COAT: First ippiy'a full`i,4-inch coat and bring to a true even surface'with the trowisL' When the water Has left the'surface (look slang the'surface toward the'light-- .when, the .shine, leaves the. surface,..it-is ready to..broom) broom the surface to open the pores of the piaster,! break ing any. skin that may form on the surface.. Keep the broom clean and continually shake out tile mortar, which - accumulates in the broom. . * .::r. ; i mm/ * itii-i SECOND COATi When.first coat is. set and. dry apply second coat Vi inch thick, aa above, bringing total, thickness of Sahinite to full yij inch thick oyer the brown coaL Sec* ond cost must be spplied. uniformly level. . It cannot be patched or filled out without discoloration. ''.......... : * : r- i / < r t> * ;i SAB1N1TE No. 38i First.coat should be kept; damp for two days snd then sllowed to dry. naturally. When dry and hardened apply second coat of Sahinite No. 38, Ya inch thick, bringing total thickness to full y. inch over the brown to even up the surface. Develop a floated surface with a clean cork float.' Float shortly after application when the base coat has had an opportunity to draw out a little of die water." Floating when too wet produces a surface "skin." Employ the entire surface of the float with very little pres sure. ' Floating when too dry will give a rough surfaced job. The object of floating is to give a uniform appearance, and break surface skins which close the pores. Patch all low or. torn places in finish individually and aiwaya before floating.' 1 i 'I .... . ... I f DRYING t After application allow Sahinite to dry nalur* ally, furnishing hest and ventilation in slow drying weather .for Sabiniles'A and B, but not for No. 38. Do' not under any oircumstancea wet down the surface of Sahinite.with water to promote hardening. This'will result in stained and blotched surfaces. - yi 1 1 .mi,'................. : .. ; . ............1 STOKE SABINITE IN A DRY PLACEi Pile on cost. Neither first coat.nor second coat of Sahinite No. 38 planking and cover with tarpaulin where necessary to pro should be subjected to artificial drying. . .. tect from dampnesa. ( .. . dboo zooati UNITED STATES GYPS U M * 10 **! ill) I1IMI *! k COMPANY CHICAGO GP003 1767 6U6S