Product Data Sheet
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BMI Acrylic 550 Smooth Finish

Exterior and Interior Finish Coat for Building Façades

BMI Acrylic 550 Smooth Finish is a premium, ready mixed, flexible textured, decorative and protective wall finish over prepared vertical, above grade concrete, EIFS, masonry and plaster/stucco substrates. BMI Acrylic 550 Smooth Finish can be used on either interior or exterior surfaces. BMI Acrylic 550 Smooth Finish is available in light or dark tint bases and can be integrally colored with Colorfast pigment system.

  • Excellent adhesion properties*
  • Excellent UV resistance
  • Efflorescence resistance*
  • Resistant to dirt pick up
  • Durable; Good surface-hardening capabilities
  • Classic smooth finish
  • Resistant to mildew, algae, and fungal growth
  • Vapor permeable
  • Available in light or dark tint bases
  • Meets SCAQMD Rule 1113 when colored with Colorfast pigments
*when used with BMI Acrylic Primer 100
Product Data Sheet
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Usage

BMI Acrylic 550 Smooth Finish may be used over interior or exterior surfaces such as:
  • Stucco base coats
  • EIFS
  • Prepared exterior gypsum board lids
  • Prepared concrete masonry in exterior/interior applications
  • Drywall
  • Cement board
  • Sealed gypsum plaster
BMI Acrylic 550 Smooth Finish can be used as a top coat over BMI Acrylic Finishes  

Advantages

  • Excellent adhesion properties*
  • Excellent UV resistance
  • Efflorescence resistance*
  • Resistant to dirt pick up
  • Durable; Good surface-hardening capabilities
  • Classic smooth finish
  • Resistant to mildew, algae, and fungal growth
  • Vapor permeable
  • Available in light or dark tint bases
  • Meets SCAQMD Rule 1113 when colored with Colorfast pigments
*when used with BMI Acrylic Primer 100

Packaging

65 lb (29.5 kg) pail

Color

Factory tinted to desired color

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • Exceeds ASTM and ICC Acceptance Criteria
  • SCAQMD Rule 1113 VOC compliant
Product Information

Chemical Base

  • Binder base: 100% acrylic polymer emulsion
  • Filler: Mineral aggregates
  • Proprietary additives
  • Pigment base: Titanium Dioxide

Shelf Life

15 months from date of production when stored properly in original, unopened and undamaged sealed packaging

Storage Conditions

Store dry at 50–90 °F (10–32 °C). Protect from moisture, direct sunlight, and freezing. If frozen, discard material. Do not stack more than 3 pails high.

pH-Value

8.0-10.0
Technical Information

Crack Bridging Ability

Result

ICC/ASTM Criteria

1" diameter @-4°F (-20°C)

—

Permeability to Water Vapor

40 perms

(ASTM E-96 Procedure B)

Resistance to Weathering

Result

ICC/ASTM Criteria

Pass @ 5000 hours

No deleterious effects at 2000 hours when viewed under 5X magnification

Pass @ 35 days

No growth supported during 28 day exposure period

No Growth at 28 days

—

Pass @ 1000 L

No cracking or loss of film integrity at 500 L of sand

Pass @ 10,000 cycles

—

Freeze-Thaw Stability

Result

ICC/ASTM Criteria

Pass @ 60 cycles

No deleterious effects @ 10 cycles when viewed under 5X magnification

Water Resistance

Result

ICC/ASTM Criteria

Pass @ 28 days

No deleterious effects at 14 day exposure

Salt Spray Resistance

Result

ICC/ASTM Criteria

Pass @ 900 hours

No deleterious effects at 300 hours

Reaction to Fire

Result

ICC/ASTM Criteria

Flame Spread: 0 to 15

Smoke Spread: 0 to 15

Flame Spread < 25 Smoke Developed < 450

Application

Application Information

Ambient Air Temperature

45–100 °F (7–37.8 °C)

Substrate Temperature

45–100 °F (7–37.8 °C)

Set Time

BMI Acrylic 550 Smooth Finish will completely dry within 24 to 48 hours. During the dry time the finish must be protected from severe weather conditions and from potential abuse from other trades. High humidity and low temperatures will extend the cure time.

Waiting / Recoat Times

1-4 hours depending on ambient temperature, humidity, and film thickness.
Consumption

Coverage

One coat coverage: 180-220 ft2 (16-20 m2) per pail at 40 mils (1 mm) thick.

Two coat coverage: 90-110 ft2 (8-10 m2) per pail at 90 mils (2 mm) thick.

Normal coating system is two coats. Coverage figures do not include allowance for surface profile, porosity, material waste and suction.
Application steps

MIXING

Mix with a drill mixer and jiffler paddle or similar paddle. Do not exceed 400 rpm when mixing or the product could be air entrained which will increase "pin-holing" and decrease bonding characteristics. If BMI Acrylic 550 Smooth Finish is not factory tinted, add liquid color to the pail of finish. Make sure all the color is added by rinsing out the color vial with water into the pail. Up to 16 ounces of clean potable water may be added to BMI Acrylic 550 Smooth Finish until desired consistency is achieved.

APPLICATION

Apply BMI Acrylic 550 Smooth Finish with a stainless-steel trowel, in a continuous application, working to a wet edge to eliminate cold joints. BMI Acrylic 550 Smooth Finish does not need to be floated, but it can be wet troweled to remove trowel marks. Detail bands and shapes may be applied in the same manner. For the smoothest application, apply in two tight coats. Allow first coat to dry enough that it will not be disturbed during application of the second coat. When second coat is firm, trowel to desired smoothness. Light, consistent misting with water during smoothing will increase smoothness. Do not over trowel, over-water, or water cure when applying BMI Acrylic 550 Smooth Finish. Variations in color tint and smoothness should be expected. For spray application, spray with consistent motion, pressure, distance and spray angle to achieve a consistent texture. A job-site mock up for spray application is advised.

 

CLEANING OF TOOLS

Water soluble prior to drying. Clean tools and equipment with water immediately after use.

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