Series 446 | Perma-Shield MCU

Generic Type Hydrophobic Aromatic Polyurethane
Common Usage An advanced technology moisture-cured, hydrocarbon-modified coating providing excellent protection to steel and concrete substrates in wastewater environments. Provides excellent resistance to H2S gas permeation, protects against MIC and provides chemical resistance to domestic wastewater environments. It is user-friendly and rapid curing.
Colors 1221 Black, 1222 Gray, 1223 Red, 1224 Blue. Note: Color will yellow and fade when exposed to UV light.
Primers Steel: Self-priming or Series 1, 66, N69, N69F, V69, V69F, N140, N140F, V140, V140F, 161.
Concrete: Series 215, 217, 218.
Note: When using Series 66, N69, V69, N140, V140 or 161 for immersion service, scarify the surface with fine abrasive before topcoating if the Series 66, N69, V69, N140, V140, or 161 prime coat has been exterior exposed for 60 days or longer. When using N69F, V69F, N140F, or V140F for immersion service, scarify the surface with fine abrasive before topcoating if the N69F, V69F, N140F or V140F prime coat has been exterior exposed for 30 days or longer.
Topcoats Series 73, 446, 1074, 1074U, 1075, 1075U. Note: The following recoat windows apply: Series 1074/1074U or 1075/1075U—3 days, Series 73—14 days, Series 446—30 days. Series 446 must be scarified or an additional “tie coat” of 446 must be applied if recoat time has elapsed before topcoating with Series 73, 1074/1074U or 1075/1075U. Series 446 must be scarified if recoat time has elapsed and Series 446 is the specified topcoat.
Volume Solids 71.0 ± 2.0% (mixed) †
Recommended DFT 5.0 to 10.0 mils (125 to 250 microns) per coat.
Curing Time
Temperature To Handle Recoat Immersion
90°F (32°C) 3 hours 6 hrs 4 hours
75°F (24°C) 4.5 hours 8 hrs 4 hours
55°F (13°C) 8 hours 12 hrs 4 hours
35°F (2°C) 48 hours 16 hrs 16 hours
Curing time will vary with surface temperature, humidity and film thickness.
Volatile Organic Compounds Unthinned: 1.98 lbs/gallon (237 grams/litre)
Thinned 10% (No. 49 Thinner): 1.98 lbs/gallon (237 grams/litre)
Thinned 10% (No. 2 Thinner): 2.46 lbs/gallon (295 grams/litre) †
HAPS Unthinned: 0.05 lbs/gal solids
Thinned 10% (No. 49 Thinner): 0.05 lbs/gal solids
Thinned 10% (No. 2 Thinner): 1.06 lbs/gal solids
Theoretical Coverage 1,150 mil sq ft/gal (28.2 m²/L at 25 microns). See APPLICATION for coverage rates. †
Number of Components Two: Part A & Part B

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