CHAPTER 13: ENCAPSULATION

1 13 1 CHAPTER 13: EncapsulationCHAPTER 13: ENCAPSULATIONStep-by-Step 13 3I. 13 5A. 13 5B. Standards and 13 5C. 13 6II. Assessment of surfaces and Components for 13 6A. Specific surfaces and Components Not Suitable for 13 6B. All Other 13 7 III. Encapsulant 13 8IV. Minimum Performance Requirements for 13 9A. Safe 13 9B. 13 9C. Ability To Remain 13 101. Mechanical Properties .. 13 102. Chemical Resistance Properties .. 13 103. Durability .. 13 10D. Fire, Health, and Environmental 13 10V. Factors To Consider in Selecting and UsingEncapsulant 13 11A.

2 Base 13 11B. Lead-Based Paint Film 13 11C. Application and Installation 13 111. Skill Level .. 13 112. Method and Environmental Conditions .. 13 113. Regulations .. 13 12D. Environmental Service 13 12E. Use 13 12F. Encapsulant Service 13 12G. Safety Constraints and 13 12H. 13 13I. 13 13J. 13 13K. Technical 13 1413 2 CHAPTER 13: EncapsulationVI. Specific Encapsulant Products andSurface Preparation 13 14A. Encapsulant Product 13 14B. Surface 13 141. Cleaning .. 13 142. Deglossing .. 13 143. Removal of Loose Paint .. 13 154. Preparing Exposed Base Substrates.

3 13 15C. Field Patch 13 151. Size of Patch Tests .. 13 152. Location of Patches .. 13 153. Surface Preparation for Patch Testing .. 13 154. Encapsulant Application and Installation .. 13 165. Patch Preparation for Conducting a Lead-Based Paint Soundness Test .. 13 166. Visual and Adhesive Evaluation of Field Patch Tests .. 13 167. Documentation of Patch Test Results .. 13 18 VII. Application and Installation of the ENCAPSULATION 18A. Surface Preparation for 13 18B. Installation and Application of Encapsulant 13 191. Nonreinforced and Reinforced Coatings .. 13 192. Adhesively Bonded 13 19C.

4 Inspection of Encapsulant 13 211. Tools .. 13 212. Procedures .. 13 21 VIII. Periodic Monitoring and 13 22IX. 13 2213 3 CHAPTER 13: EncapsulationEncapsulation: How To Do ItStep-by-Step if encapsulants can be used. Do not encapsulate the following surfaces :FFriction surfaces , such as window jambs and door that fail patch with substrates or existing coatings that have a high level of in which there is a known incompatibility between two existing paint that cannot support the additional weight stress of ENCAPSULATION due to existingpaint surfaces that are prone to rust or field tests of surfaces to be encapsulated for paint film special use and environmental requirements ( , abrasion resistance and ability to span basesubstrate cracks).

5 Encapsulant performance test data supplied by the at least one test patch on each type of building component where the encapsulant will be both nonreinforced and reinforced coatings, use a 6- by 6-inch test patch area. Prepare the surface inthe manner selected for the complete job. Prepared surfaces for patch testing should be at least 2 incheslarger in each direction than the patch fiber-reinforced wall coverings, use a 3- by 3-inch patch. For rigid coatings that cannot be cut with aknife, use a soundness liquid coating encapsulants, allow coating to cure and then visually examine it for wrinkling, blister-ing, cracking, bubbling, or other chemical reaction with the underlying paint.

6 For all encapsulants, carryout the appropriate adhesion the results of all patch tests on Form Develop job Implement a proper Worksite Preparation Level (see CHAPTER 8).12. Repair all building components and substrates as needed, , caulk cracks and repair sources of Prepare surfaces . Remove all dirt, grease, chalking paint, mildew and other surface contaminants, remnantsof cleaning solutions, and loose paint. All surfaces should be deglossed, as Ventilate the containment area whenever volatile solvents or chemicals are During encapsulant application or installation, monitor temperature and humidity.

7 For liquid coatings,monitor coating thickness to ensure that the encapsulant manufacturer s specifications are 4 CHAPTER 13: EncapsulationStep-by-Step Summary (continued)16. Conduct cleanup and The owner should monitor the condition of the encapsulant after the first 6 months and at least annuallythereafter. Repairs should be made as necessary. Reevaluations should be completed according to the schedulein CHAPTER Provide information to residents on how to care for the ENCAPSULATION system properly and how to contact theowner to get repairs completed safely and Maintain records on the exact detailed locations of encapsulant applications, concentration of lead in thepaint underneath the encapsulant, patch test specifications and results, reevaluations, product name, contrac-tor, and date of application or installation, along with a copy of the product label and a material safety datasheet (MSDS) for the product.

8 Record failures and corrective measures, signs of wear and tear, and theidentity of the certified risk 5 CHAPTER 13: EncapsulationChapter 13: EncapsulationI. IntroductionThis CHAPTER provides information on (1) assess-ment of the suitability of a surface ( , the ex-isting paint film) and the building componentsubstrate for ENCAPSULATION ; (2) types ofencapsulant systems; (3) considerations for se-lection and use of encapsulants; (4) field patchtesting; (5) general surface preparation and ap-plication procedures; and (6) procedures for on-going monitoring by the owner and reevalua-tion by a risk DefinitionEncapsulation is the process that makes lead-based paint inaccessible by providing a barrierbetween the lead-based paint and the environ-ment.

9 This barrier is formed using a liquid - applied coating (with or without reinforcementmaterials) or an adhesively bonded coveringmaterial. While encapsulant systems may alsobe attached to a surface using mechanicalfasteners, the primary means of attachment foran encapsulant is bonding of the product to thesurface (either by itself or through the useof an adhesive).Encapsulants should not be confused with en-closures, which are rigid barriers fastened bymechanical means to the base substrate (or thestructural members). Enclosures rely on me-chanical fasteners as the primary method ofattachment.

10 Enclosures are addressed inChapter 12, Section depends upon a successful bondbetween the surface of the existing paint filmand the encapsulant for performance. However,this condition alone is not sufficient for encap-sulation system success. All layers of the exist-ing paint film must adhere well to each other, aswell as to the base substrate. If not, the encap-sulation system may fail. Thus, proper assess-ment of the suitability of the surface and sub-strate for ENCAPSULATION is essential prior to theapplication and installation of the success of an ENCAPSULATION application alsodepends on successful patch testing in the field,proper completion of surface preparation andapplication procedures, ongoing monitoring bythe owner and resident, and periodic reevalua-tion by a risk assessor.