Description:
Western One-Pass Plaster is a factory sanded, premium blended plaster base coat for conventional stucco systems. As an alternative to typical “Scratch” and “Brown” individual coatings, Western One-Pass Plaster is designed to be applied One-Pass to the full thickness of 3/4” to 7/8” when applied in accordance with Western Blended Products application instructions. Western One-Pass Plaster is designed to be a pump grade product with excellent flow that does not require additional additives (Hi-Flow). The product may also be applied manually. Western One-Pass Plaster develops higher PSI strengths than standard Plastic Cement. A fibered version of Western One-Pass Plaster is also available per request.

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Packaging:
This product is packaged in 80 lb / 36.29 kg bags. Pallet contains 42 sacks.

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Benefits:

• Just add water.

• One-Pass installation from 3/4” to 7/8” full thickness.

• Excellent flow for pumping (Hi-Flow).

• Less equipment packing issues

• Faster mixing cycles than 50/50 mixes of Portland and Plastic Cements.

• Higher strengths than Plastic cement.

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Mixing:
Each bag of Western One-Pass Plaster Cement is mixed with 1.25 to 1.5 gallons of clean, potable water. Mixing time in a mechanical mixer shall be two (2) to three (3) minutes minimum per bag.  Care shall be taken when continuous batching, that each bag is allowed the minimum mixing time.

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Coverage:
Scratch and Brown Applications:

• 3/8” Thickness: Approximately 2.75 sq. yds. (2.3 sq. meters).

One-Pass Applications:

• 1/2” Thickness: Approximately 2.0 sq. yds. (1.7 meters sq. meters).

• 3/4” Thickness: Approximately 1.37 sq. yds. (1.15 sq. meters).

• 7/8” Thickness: Approximately 1.17  sq. yds. (0.98 sq. meters).

Application:
This product may be applied by hand or machine. Application methods, acceptable substrates and total applied thickness shall meet the requirements set forth in ASTM C926. This product may be used in a standard scratch and brown application; or as an alternative One-Pass application by gradually building the coating until the desired allowable thickness is obtained. Once the full thickness is achieved, walls must be leveled without overworking the material. The stucco shall be hard floated to promote densification. The Alternate Method of Application provides a better bond between coats, improves curing and speeds completion times.  Alternate method of application is not suggested for open-frame construction.

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Curing:
This product requires a minimum of forty-eight (48) hours moist curing as noted in IBC Section 2512.6 or 2512.8.2 for the Alternative Method of Application. Environmental conditions such a heat, wind and low humidity all require liberal curing.

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Finishing:
A variety of finishes such as Western Exterior Stucco, Premium Acrylic Finish (PAF), WBP Exterior Stucco Finishes, standard acrylic paints or elastomeric coatings may be applied over the fully cured base coat. The recommendations of the finish coat manufacturer shall be followed regarding base coat preparation, bonding, application and curing of their product.

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Limitations:
When applied by machine, well maintained, proper equipment must be used when applying the material. The material flow may vary in project applications over five stories high, or by utilizing hose assemblies over 300’ in length. Do not over work the material. Do not wet float the brown coat. Do not add accelerator, air entrainment or other admixtures without written permission from an authorized manufacturer of Western Blended Products. Do not apply when surface or ambient temperatures are at or below 40°F / 4.4°C or above 100°F / 34°C. Do not apply to surfaces that are contaminated with bond breakers, oils or other matter that may affect the performance of the product. Do not apply if conditions are expected to be above or below the specified temperature range within 24 hours of application. Do not add additional ingredients without specific written approval from an authorized manufacturer of Western Blended Products.

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Storage:
Product shall be kept indoors or if stored outdoors, shall be adequately covered to keep dry and be stored off the ground.

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Applicable Standards, Specifications and Codes:

• IAPMO ER# 382

• ICC  AC11

• ASTM C150

• ASTM C926

• ASTM 1328

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IBC & IRC Recognition:

• 2021 ,2018, 2015, 2012, and 2009 International Building Code (IBC).

• 2021, 2018, 2015, 2012, and 2009 International Residential Code (IRC).

• 2023 Florida Building Codes.​

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Warranty:
Manufacturers or Western Blended Products (WBP) warrants its products to be of merchantable quality and suitable for the general purpose for which they were intended, when applied in accordance with WBP instructions.  Manufacturers of WBP do not warrant its products to be suitable for any purpose or use other than for which they were intended.  Liability under this warranty is limited to supplying new material without charge, or at manufacturers of WBP option, to a refund of the purchase price.  In the event of a claim under this warranty, written notice must be given to the originating plant of the WBP goods at the address shown hereon.  This limited warranty is issued and accepted in lieu of all other expressed warranties, and expressly excludes liability for consequential damages.  Some states do not allow the exclusion or limitation of incidental or consequential damages, or limitations on how long an implied warranty lasts, so the above limitations and exclusions may not apply to you.  This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.