DOUBLE BOND ADHESIVE SYSTEM Architects Specification Double Bond Installation Using Polymer Engineering Flooring Adhesives ADHESIVES, AND EQUIPMENT For installing Jute backed, Polypropylene "Action Bac" type and Latex backed, woven and tufted carpets. WARRANTY Provide normal manufacturers warranty, extendable for a period of 5 years, covering replacement of adhesive materials together with reimbursement of reasonable reinstallation charges to the installing contractor, if adhesive bond failure is determined within the warranted period, providing Polymer Engineering’s conditions are met regarding recommended equipment, materials and techniques. SURFACE PREPARATION All subfloor surfaces shall be prepared in accordance with Australian Standard AS/NZS 2455.1.1995 -"Textile Floor Coverings Laying Practice". Adhesive shall be Polymer Engineering 900 Pressure Sensitive Adhesive or Polymer Engineering 999 Pressure Sensitive Adhesive for bonding the double bond underlay to the subfloor. Adhesive shall be Polymer Engineering 227 Direct Stick Carpet Adhesive or Polymer Engineering 228 Health Range Solvent Free Carpet Adhesive or Polymer Engineering 300 Contract Carpet Adhesive for bonding the carpet to the double bond underlay. Carpet edges shall be sealed with Polymer Engineering 60% Latex and carpet seams sealed with Polymer Engineering 500 Solvent Based Carpet Seam Adhesive, or Polymer Engineering Double Bond Carpet Seaming Tape. Trowel shall be a 1.6mm x 1.6mm x 1.6mm "V" notched for Polymer Engineering 900 or Polymer Engineering 999 pressure sensitive adhesive, coverage up to 5 sq metres per litre. Trowel: shall be 2.4 mm x 2.4mm x 2.4mm "V" notched for Polymer Engineering 227, 228 or 300 carpet adhesives, coverage up to 3 sq metre per litre, for smooth backed carpets and 3.2mm x 1.6mm x 3.2mm "V" notches for woven and "Action Bac" type carpets coverage up to 2 sq metres per litre. APPLICATION OF PRIMERS & ADHESIVES FOR DOUBLEBOND CARPET TILE INSTALLATION For high porous subfloors, or floors where a floor leveling compound has been used, the use of Polymer Engineering 6000 Floor & Wall Primer is recommended. Polymer 6000 Floor & Wall Primer shall be applied evenly over the entire subfloor surface by either spray gun or roller in accordance with the appropriate Polymer Engineering Technical Data Sheet. In some circumstances, depending on the rate of absorbency of the subfloor, a second application of primer may be necessary. Drying time shall be approx. 10 to 20 minutes depending on substrate and climate conditions. Spread Polymer Engineering 900 Pressure Sensitive Adhesive or Polymer Engineering 999 Pressure Sensitive Adhesive using specified "V" notched trowel to 100% of subfloor. Adhesive and sub floor temperatures must be greater than 10° Celsius. It is essential that the underlay (Bridgestone Specilay or equivalent) is lowered into the adhesive before it has completely dried or become clear. This will ensure adhesive transfer to the back of the underlay. Tack up time will vary according to climatic conditions -20 minutes at 20° Celsius. Apply Polymer Engineering 227 or Polymer Engineering 228 or Polymer Engineering 300 Adhesive using the specified "V" notched trowel to 100% of the surface of the slab underlay. For hard to hold carpet, it may be necessary to allow a short tack up time. Carpet edges should be sealed with Polymer Engineering 60% Latex and carpet seams sealed Polymer Engineering 500 Solvent Based Carpet Seam Adhesive. Starting at one end of the seam, insert the applicator tip into the seam and apply a continuous bead of adhesive along the entire length as per Polymer Engineering published instructions. Or After bonding the carpet to the floor, open the seams and insert the Polymer Engineering Dual Bond/Direct Stick Carpet Tape for tufted and woven carpets, the full length of each seam and join the carpet using a carpet seaming iron as per Polymer Engineering published instructions. Roll the carpet within one hour of installation. Material Safety Data Sheet available upon request. top