Use of Field-Applied Fluoropolymer Coatings for Maintenance and Restoration Applications D+D Webinar Bob Parker (AGCCA) June 29, 2011

Field-applied Maintenance & Restoration Coatings Outline 1) Why are you considering recoating the structure? 2) Choice of Coating Type 3) Identification of Surfaces to be coated 4) Substrate Preparation 5) Application of Coating 1

Field-applied Maintenance & Restoration Coatings Why are you considering recoating the structure?  Aesthetics  Protection of substrate  Energy Savings  Expansion / Remodeling  Resale of Structure 2

Field-applied Maintenance & Restoration Coatings Choice of Coating Type:  cost considerations  substrate being coated  previous coating used on structure  length of future ownership (color scheme)  experience of coating applicators  exposure to sun and geographic location  LEED certification (favor FEVE coatings) 3

Field-applied Maintenance & Restoration Coatings LEED credits toward certification o “Leadership in Energy and Environmental Design” o created by U.S. Green Building Council (non-profit; founded in 1993) o LEED certification is voluntary o Benefits are measured in many ways: - increase in appeal of building to tenants (higher rents) - chance for tax credits - cost effective (new construction) - mitigate risks/lawsuits - competitive differentiator 4

Field-applied Maintenance & Restoration Coatings “LEED 2009 for Existing Buildings: Operations and Maintenance” - explains how to receive credit points toward certification  Four categories found for possible credits for FEVE coatings: 1) Sustainable Sites SS Credit 2: Building Exterior & Hardscape Management Plan SS Credit 7.1: Heat Island Reduction – Non-Roof 2) Energy and Atmosphere EA Credit 1: Optimize Energy Efficiency Performance 3) Materials and Resources MR Credit 3: Sustainable Purchasing – Facility Alterations and Additions 4) Innovations and Operations IO Credit 1: Innovative Changes to Building (LEED-type goal) IO Credit 3: Documenting Sustainable Building Cost Impacts 5

Field-applied Maintenance & Restoration Coatings Identification of Surfaces to be coated: Discussion will involve factory-coated materials 3 step evaluation is suggested 1) Establish type of metal substrate 2) Identify the previous coating 3) Identify and correct any problem areas of the structure 6

Field-applied Maintenance & Restoration Coatings Types of metal that are factory-coated: 1)cold-rolled steel 2)hot-dipped galvanized 3)electrogalvanized 4)zinc-steel 5)aluminum 6)stainless steel 7)copper 8)brass 7

Field-applied Maintenance & Restoration Coatings Identification of Previous Coating  PVDF coating vs. non-PVDF coating - will determine the proper procedure for surface preparation - adhesion to a fluoropolymer can be difficult - PVDF can be recoated providing: 1. It has reached a ripe old age 2. It is given the proper surface treatment 3. An approved primer is used 4. Primer passes ASTM D3359 adhesion test 8

Field-applied Maintenance & Restoration Coatings 9 PVDF Coating – after 20 years of outdoor weathering (5000X magnification)

Field-applied Maintenance & Restoration Coatings Correction of Problem Areas  Corrosion – simple or galvanic  Water Drainage Problems – resulting in discoloration of the coated surfaces  Water infiltration  Poorly applied recoats or touchups 10

Field-applied Maintenance & Restoration Coatings Substrate Preparation – non-Ferrous SSPC–SP 16 “Brush-off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and NON-Ferrous metals”  SSPC SP-1 - removal of dirt, chalking, and oil deposits  Brush-Blasting with wet or dry abrasive; closed cycle  Recommended abrasive selection (size and type) depends on: a. type, grade, and surface condition of the substrate b. type of blast cleaning system c. finished surface to be produced d. abrasive to be recycled or not  Second Cleaning per SSPC SP-1  Profile Minimum = 19 microns (0.75 mils); check with ASTM D 4417 or ASTM D

Field-applied Maintenance & Restoration Coatings Substrate Preparation - Steel 1)SSPC–SP 6 “Commercial Blast Cleaning”  SSPC SP-1 - removal of dirt, chalking, and oil deposits  Blasting Cleaning with wet or dry abrasive; closed cycle  Recommended abrasive selection (size and type) depends on: a. type, grade, and surface condition of the substrate b. type of blast cleaning system c. finished surface to be produced d. abrasive to be recycled or not  Second SSPC SP-1 Cleaning 12

Field-applied Maintenance & Restoration Coatings Application of FEVE Coating: 1)FEVE Coating comparable to a Two-component Polyurethane Coating; available as a solvent-based system and a water- based system 2)Can also be supplied as a one-component solvent-based coating or a one-component water-based coating 3)All coatings can be brush, rolled or sprayed 4)Follow the specific instruction from each manufacturer 5)Pot lives of 2K coatings decrease quickly as the air temperature increases: 5 50° F. 1 90° F. 6) All coatings available in a wide range of glosses 13

Field-applied Maintenance & Restoration Coatings 14 Sunshine Weatherometer Exposure Testing (Carbon Arc)

Field-applied Maintenance & Restoration Coatings 15 EMMAQUA Testing (Outside Test Fence – Arizona)

Field-applied Maintenance & Restoration Coatings Conclusion: FEVE Coatings can be used as field-applied coatings over PVDF-based factory-applied finishes. Superior weathering performance can be obtained comparable to the PVDF finishes. Solar reflective coatings containing IR-reflective pigments can also be incorporated into an FEVE coating. 16