Water-borne Preservatives and Retentions by Use Category

Arsenicals

Non-Arsenical Copper Preservatives

Other Preservatives

USE CATEGORY

SERVICE CONDITIONS

USE ENVIRONMENT

COMMON AGENTS OF DETERIORATION

TYPICAL APPLICATIONS

COMMODITY

CCA

ACZA

CuN-W

ACQ-D

MCQ

CA-C

MCA

KDS

CX-A

EL2

PTI

Chromated copper arsenate

Ammoniacal copper zinc arsenate

Copper Napththenate

Alkaline Copper Quat

Micronized ACQ

Copper Azole

Micronized CA

Alkaline Copper Betaine

Copper HDO

DCOI & Imidacloprid

Propiconazole, Tebuconazole, Imidacloprid

Retentions in pcf

Retention Source->

AWPA

AWPA

AWPA

AWPA

ICC ES

AWPA

AWPA

AWPA

AWPA

AWPA

AWPA

UC1

Interior construction Above Ground Dry

Continuously protected from weather or other sources of moisture

Insects only

Interior construction and furnishings

These uses not applicable regarding preservative usage

UC2

Interior construction Above Ground Damp

Protected from weather, but may be subject to sources of moisture

Decay fungi and insects

Interior construction

UC3A

Exterior construction Above Ground Coated & rapid water runoff

Exposed to all weather cycles, not exposed to prolonged wetting

Decay fungi and insects

Coated millwork, siding and trim

UC3B

Exterior construction Above Ground Uncoated or poor water run-off

Exposed to all weather cycles including prolonged wetting

Decay fungi and insects

Decking, deck joists, railings, fence pickets, sill plates, uncoated millwork

Sawn Product

0.25

0.25

0.07

0.15

0.15

0.06

0.06

0.19

0.206

0.019

0.013

Plywood

0.25

0.25

NL

0.15

NL

0.06

0.06

0.19

0.206

0.019

0.013

UC4A

Ground contact or fresh water Non-critical components

Exposed to all weather cycles, normal exposure conditions

Decay fungi and insects

Fence, deck, and guardrail posts, crossties & utility poles (low decay areas)

Sawn Product

0.40

0.40

0.11

0.4

0.34

0.15

0.15

0.47

NL

NL

NL

Posts

0.40

0.40

0.11

0.40

NL

0.15

0.15

0.47

NL

NL

NL

Plywood

0.40

0.40

NL

0.40

NL

0.15

0.15

NL

NL

NL

NL

UC4B

Ground contact or fresh water Critical components or difficult replacement

Exposed to all weather cycles, high decay potential includes salt water splash

Decay fungi and insects with increased potential for biodeterioration

Permanent wood foundations, building poles, horticultural posts, crossties & utility poles (high decay areas)

Sawn Product

0.60

0.60

NL

0.60

NL

0.31

0.31

NL

NL

NL

NL

Posts

0.50

0.50

NL

0.50

NL

0.25

0.25

NL

NL

NL

NL

Plywood

0.60

0.60

NL

0.60

NL

0.31

0.31

NL

NL

NL

NL