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 H_2_S gas permeation, protects against MIC and provides chemical resistance to domestic wastewater environments. It is user-friendly and rapid curing.

View more product details

Colors

  • 1221 Black
  • 1222 Gray
  • 1223 Red Oxide

View Available Colors

View available colors in our Color Tool; you can also select and request color swatches.

Volume Solids

71.0 ± 2.0% (mixed) †

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.

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.

Number of Components

Two: Part A & Part B

Recommended DFT

5.0 to 10.0 mils (125 to 250 microns) per coat.

Theoretical Coverage

1,150 mil sq ft/gal (28.2 m²/L at 25 microns). See APPLICATION for coverage rates. †

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

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) †

Still have questions? Request the information you’re looking for:

Request Info

How to Purchase

Tnemec coatings are sold through a select network of local independent sales representatives who can help you find the best product for your needs. Find a rep

Continue Exploring in the color tool

Close

Color Swatch packet

When you finish selecting, request your Swatch Packet below. Expect your swatch cards in 5-7 business days. Contact your expert Sales Rep at any time.

Request swatch packet

Continue Exploring in the color tool

Close