Foster® Bridging Mastic Encapsulant-Lockdown 32-80™

Applications
TO SPRAY APPLIED ASBESTOS CONTAINING MATERIALS - Using the recommended spray equipment, coat the matrix with Foster Bridging Mastic, holding the spray gun perpendicular to the surface of the ACM with the tip of the gun between 12 and 18 inches (30-46 cm) from the surface to be coated. Apply sufficient Foster 32-80 encapsulant to produce approximately one half the total recommended dry film thickness (minimum 25 mils wet). Allowing an open time of 8 hours (depending on the temperature and humidity conditions), a second application of encapsulant is made to the same area in the same manner, in an opposite pass direction from that used to apply the first coat. This procedure is continued until the total desired minimum dry film thickness is achieved.

To pipe covering and boiler lagging systems - Clean the surface of the pipe covering/boiler lagging using a rag or sponge thoroughly moistened with Foster® Protektor®
Sealant 32-22TM. (In the case of a larger structure, spray apply a mist coat.) Consider the wipe pad to be contaminated material and dispose of in an appropriate manner. Coat the ACM with Foster Bridging Mastic via brush/spray to a minimum thickness of 25-30 mils wet. Imbed into this wet film a reinforcing membrane, smoothing out any wrinkles and overlapping all edges and seams at least 2 inches (5cm). (The reinforcing membrane should have weave openings no smaller than 10x10.) While the coating is still wet, apply asecond coat of Foster Bridging Mastic in the same manner as the first. The resultant cured film shall have a minimum thickness of 25 mils dry. IMPORTANT NOTE: The quantity of material required to properly encapsulate an ACM is a variable which is dependent upon the surface profile of the intended matrix. The estimated quantity required should be derived from a coverage test and equated to the larger area. The best means of insuring adequate coverage is to determine the amount of material that will be required for a specific area, segregate that quantity in the defined area, and apply until the segregated material is exhausted. As a lockdown. Dilute Foster 32-80 a maximum of 1:1 (one part water to one part Foster 32-80). Insure that the dilution process does not introduce foreign particles or contaminants that could impair the bond of the applied material or efficiency of the application
equipment. Keep the diluted product stirred to prevent settling.

Appropriate spray equipment
Any of the following GRACO pumps (or their equivalent) can be used to spray Foster Bridging Mastic.
Pumps: Ultra Max 1095 or 1595
Hose: 3/8 inch (9.53mm) inside diameter minimum up to 100 lineal feet 1/2" (30M). 1/2" (12.7mm) diameter minimum for length beyond 100 lineal feet.
Gun: GRACO Silver or Golden Hydramastic gun with Reverse-A-Clean tip assembly.
Tip Size: .021" to .031" (0.53 to 0.79mm). Fan size is usually 4 to 6.
Average Viscosity: 60,000 - 80,000 cps.

Clean up
Use fresh water to clean equipment before product dries. Dry product may be removed with hot soapy water or strong solvents such as chlorinated solvent (non-flammable) or xylol (flammable).

Bridging Mastic is a field proven bridging encapsulant. Upon cure, 32-80 forms a tough, light colored, washable, abrasion resistant, elastomeric coating that economically abates the release of asbestos fibers from both conventional and spray applied asbestos-containing materials (ACM). Used with glass cloth, 32-80 is ideal for use over interior pipe covering and boiler lagging insulations.

¹ - Applied to 1/4 inch (6.4 mm) inorganic reinforced cement board at a coverage rate of 3 gallons/100 sq. ft. (1.22 liters/m2 ). The flame spread may vary at different product thicknesses and/or when applied over other surfaces.

• Protect from freezing until dry.
• Not recommended for exterior use; select CP-211 instead.
• Do not store or apply below 40°F (4°C) or above 100°F (38°C).
• As a lockdown, do not apply to surfaces in excess of 170°F (93.3°C).
• Not suggested for use on floors.