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Fiberlock Transite Barrier Compound

Fiberlock Transite Barrier Compound

Product Code: EN4020

TBC Transite Barrier Compound is specifically blended toseal exterior asbestos containing Industrial Fiber Cement Board (Transite®).TBC uses a high-solids blend of resins that forms a hard yet flexible finishthat is ultraviolet resistant and mildew resistant.

- TBC is a high solid, non-toxic blend of resins that formsa hard yet flexible finish which is ultraviolet resistant and mildew resistant

- It is environmentally friendly and complies with allfederal and state VOC

- Applications: TBC is an elastomeric thermoplastic water-basedcopolymer blended specifically to seal exterior asbestos containing IndustrialFiber Cement Board (Transite®) requirements

UV and mold resistant*

Class A fire rated

High solids formula


Thermoplastic, water-based copolymer

Complies with all federal and state VOC requirements.

*Prevents mold on the surface of the dry coatingonly

Product Data Sheet

Safety Data Sheet

How to Use


Use a vacuum with a HEPA filter specifically designed tocapture hazardous dust and waste. Use MSHA/NIOSH approved or equivalentrespiratory protection suitable for concentrations and types of aircontaminants encountered. All Transite substrates must be primed with one ofFiberlock’s surface conditioners prior to applying TBC. For detailed andspecific information regarding surface preparation, refer to the TBCspecification. TBC must be applied when the atmosphere and surface temperaturesare above 50°F. Do not apply when rain is imminent within three hours afterlast application. Inspect all surfaces to be treated to insure they are clean,dry and free of all foreign matter including: dust, rust, grease, oil, mildew,loose paint, etc. If Transite is aged and friable, use a liquid applied surfaceadhesive such as Grip-Tack to yield a dimensionally stable surface prior toapplication of TBC. Mix thoroughly, clear liquid present when container isopened is an integral part of the product and must be mixed in completely.


Apply TBC with brush, roller or airless spray equipment.

Brush: Synthetic, nylon or polyester bristle

Roller: Synthetic fiber 3/8”-1/2” nap roller

Spray: .019 to .021 tip @ 2500-3000 P.S.I. (Select a machinecapable of a minimum output capacity of 0.50 gallons per minute.)


Apply liberally and uniformly. Multiple coats may benecessary to achieve desired dry thickness. Allow TBC to dry before applyingadditional coats. TBC may be top coated with paint to provide desired color oraesthetic finish. The necessary dry filmthickness of a bridging encapsulant for asbestos containing materials (ACM) willvary from project to project as ACM can have a wide range of characteristics,including density, porosity, and surface profile. In the EPA’s Guidance forControlling Asbestos-Containing Materials in Buildings (EPA 560 / 5-84024, June1985), the primary instruction regarding dry film thickness states that whenencapsulating ACM, the coating is to be applied “considerably thicker thanrecommended for painting. Coverage should be no more than 100 sq. ft. pergallon and should create a continuous, unbroken coating” (Section 5.1.3, page5-8).


Transite Surface: 50-100 ft2/gal. [Coverage depends onporosity of material and desired film thickness.]


@ 70°F 50% R.H

To Touch: 1 to 2 hours

To Recoat: 8 to 16 hours

To Full Cure: 12 to 24 Days


Tools and drippings should be cleaned with warm soapy waterbefore coating dries. Follow equipment manufacturer’s directions to clean sprayequipment. Dispose of waste according to all existing local, state and federalregulations.


Store in a dry place at temperatures between 40°F (4.5°C)and 90°F (32°C). Close container after each use; keep container tightly sealedwhen not in use. When applying with a sprayer, wear a NIOSH approved respiratorwith any R, P, N or HE filter. Use adequate ventilation to avoid over exposure.Surfaces coated with TBC must be inspected routinely. Damaged surfaces shouldbe repaired and TBC should be reapplied immediately to prevent exposure to theasbestos hazard. Do not dilute, thin or mix with any other product. Store in adry place at temperatures between 50°F and 80°F. TBC is sensitive to heat andtime. Asbestos abatement activities must be performed in accordance with allapplicable regulations including EPA, OSHA, federal, state and local. For more information always contact theappropriate agencies prior to beginning any abatement project.

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