Foster® Bridging Encapsulant 32-32

Applications
To spray applied asbestos containing materials - using the recommended spray equipment, coat the matrix with Foster Bridging Encapsulant, 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 32-32 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. Average viscosity range: 15,000-30,000 cps.

To pipe covering and boiler lagging systems - Clean the surface of the pipe covering/boiler lagging using a rag or sponge thoroughly moistened with PROTEKTOR Sealant, 32-22. (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 Encapsulant via brush/spray to 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 a second coat of Foster Bridging Encapsulant 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.

Appropriate Spray Equipment
Any of the following GRACO pumps (or their equivalent) can be used to spray Foster Bridging Encapsulant.
Pumps: Ultramax 795 or Ultramax 1095
Hose: 3/8 inch (9.53mm) inside diameter minimum.
Gun: GRACO Silver or Golden Hydramastic gun with Reverse-A-Clean tip assembly.
Tip Size:.019" to .029" (0.48 to 0.74mm). Fan size is usually 4 to 6.
Average Viscosity Range: 15,000 - 20,000 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 Encapsulant can be applied to previously painted surfaces. It can also be used over the hard, non-absorptive types of asbestos insulation that will not "accept" a penetrating- type encapsulant. Bridging Encapsulant can be used with glass cloth as a lagging adhesive and coating to encapsulate asbestos containing pipe covering and boiler lagging insulation.

¹ - Applied to 1/4 inch (6.4mm) inorganic reinforced cement board at a coverage rate of 3 gallons/100 sq. ft. (1.22 l/m2 ).

• Keep from freezing.
• Do not store below 40°F (4°C) or above 100°F (38°C).
• Do not apply to surfaces below 40°F (4°C) or to surfaces operating at, or intended to operate at or in excess of 250°F (121°C).