specifications - FAACO - Federal Aviation Administration Contract ...

T. PLASTIC CEMENT:FTWIC-2235June, 2009Fed. Spec. SS-C-153, Type I.2.02 COMPRESSIBLE SEALS:Furnish and install compressible seals at locations noted on the drawings. Seals shall befabricated or extruded neoprene having a shape that expands after being compressed, such asWatson-Bowman and Acme Corp., "Type WB," or approved equal.2.03 EXPANDING SEALANT:Precompressed chemically resistant foam sealants with self adherent adhesive, fabricated of opencellpolyester polyurethane foam impregnated with neoprene rubber suspended in chlorinatedhydrocarbons, such as "Will-Seal" Construction Foams; or approved equal. Foam seals shallhave a density to 8 to 10 lbs./cu. ft.PART 3.00EXECUTION3.01 PREPARATION:A. Clean and dry surfaces receiving caulking application. Wipe metal or glass with asuitable oil-free cleaning solvent. Prior to the application of caulking or sealants, fullyair and dry concrete or masonry mortar for a minimum of three (3) weeks. Concrete mustbe washed with a five (5) percent muriatic acid solution, followed by rinsing with clearwater. Clean masonry surfaces and free of loose mortar.B. Joints to receive caulking should not be less than 1/4" inch wide. Depths shall be 1/2 ofwidth, up to 3/4" inch deep. Depths exceeding this shall be backed with polyurethane orbutyl joint filler, as recommended by the Sealant Manufacturer. Where recommended bythe manufacturer, provide a polyethylene bond breaker strip applied behind the sealant.C. Fill joints having widths between 1/8" inch and 1/4" inch, such as those occurringbetween masonry and wood windows, with dry oakum backing packed into the spacebehind the open joint, prior to applying the sealant bead.D. Back up roping shall be rolled into position using special gauged roller. roping shall berecessed a constant depth of 2 the joint width.E. Rake and clean joints, removing all dust, moisture, rust, grease and loose materials.Mask or protect adjacent materials to prevent smearing. Promptly remove excessmaterial and clean any smear marks. Prime all surfaces receiving caulking with a primer,as recommended by the caulking manufacturer.3.02 INSTALLATION:A. CAULKING:Cut nozzle of cartridge at proper opening and angle. Apply caulking compound withsufficient pressure to completely drive compound into joints and fill voids. Apply07921-4