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AMERSHIELD TM <br /> Shelf life Base: at least 36 months when stored cool and dry <br /> Hardener: at least 24 months when stored cool and dry <br /> Notes: <br /> See ADDITIONAL DATA - Spreading rate and film thickness <br /> See ADDITIONAL DATA - Overcoating intervals <br /> See ADDITIONAL DATA - Curing time <br /> For compliance with regulations which require VOC less than 100 g/L, AMERSHIELD VOC can be specified interchangeably <br /> AMERSHIELD VOC is available only in US and Canada <br /> RECOMMENDED SUBSTRATE CONDITIONS AND TEMPERATURES <br /> Coating performance is proportional to the degree of surface preparation. Refer to the application instructions for <br /> specific primers and intermediate coats for application and curing procedure. All previous coats must dry and free of <br /> contaminants. Adhere to all minimum and maximum topcoat times for specific primers and intermediate coats <br /> Substrate conditions <br /> e Steel; blast cleaned to ISO -SaV2 or minimum SSPC SP- 6, blasting profile 30 - 75 lam (1 .2 - 3.0 mils) '.... <br /> e Aluminum; lightly abrasive blast with a fine abrasive <br /> e Concrete / Masonry; see specific primer <br /> e Previous coat (epoxy or polyurethane) must be dry and free from any contamination <br /> Substrate temperature and application conditions <br /> e Substrate temperature during application and curing down to -5eC (230F) is acceptable <br /> e Substrate temperature during application and curing should beat least 30C (5eF) above dew point <br /> e Relative humidity during application and curing should not exceed 85% <br /> e Premature exposure to early condensation and rain my cause color and gloss change <br /> SYSTEM SPECIFICATION <br /> e Primers: Direct to substrate, AMERCOAT 68 Series, SIGMAZINC Series, AMERLOCK Series, AMERCOAT Epoxies & <br /> SIGMA Epoxies <br /> For products not listed above, contact your PPG representative <br /> INSTRUCTIONS FOR USE <br /> Mixing ratio by volume: base to !hardener 80:20 (41) <br /> ® Pre-mix base component with a pneumatic air mixing at moderate speeds to homogenize the container. Add hardener to <br /> base and agitate with a power mixer for 2-3 minutes until completely dispersed <br /> o The temperature of the mixed base and hardener should be above 100C (50eF), otherwise extra thinner may be required to <br /> obtain application viscosity <br /> Thinner should be added after mixing the components <br /> ® Adding too much thinner results in reduced sag resistance <br />