BMI Acrylic 400 Medium


BMI Acrylic 400 Medium Finish is a ready mixed, flexible textured wall coating used as a decorative and protective wall finish over prepared vertical, above grade concrete, masonry and plaster/stucco substrates. BMI Acrylic 400 produces a lightly textured "sand like" floated finish.

BMI Acrylic 400 Medium Finish may be used over stucco base coats, prepared exterior gypsum board lids, prepared concrete masonry in exterior applications. BMI Acrylic 400 may be used over drywall, cement board, sealed gypsum plaster, prepared concrete masonry in interior applications. BMI Acrylic 400 has excellent adhesion properties and will resist efflorescence when BMI Primer 100 is used. 

Where to use

  • Above grade concrete
  • Concrete masonry
  • Plaster/stucco substrates, stucco base coats
  • Exterior gypsum board lids, Sealed gypsum plaster
  • Drywall
  • Cement board


  • Excellent adhesion and UV resistance 
  • Dirt pick up resistance 
  • Available in standard and custom colors


Mix with a drill mixer and jiffler paddle or similar paddle. Do not exceed 400 r.p.m. when mixing or the product could be air entrained which will increase "pin holing" and decrease bonding characteristics. Up to 8 ounces of clean potable water may be added to BMI Acrylic 400 until desired consistency is achieved.

BMI Acrylic 400 Medium Finish should be applied with a stainless steel trowel. Enough material should be applied to cover all surfaces. Always apply BMI Acrylic 400 in continuous application, working to a wet edge to avoid cold joints. Finish material with a plastic float using a "figure 8" pattern. Avoid water drops and runs on uncured material. 


65 lb. pail BMI Acrylic 400 115-125 sq/ft
(coverage will vary depending on texture, substrate and suction).


Available in all 30 of our stock colors from our BMI Exterior Color Guide, or custom colors available upon request. 

Shelf Life:
Twelve months when stored in a cool dry location (50° - 90°F Keep out of direct sunlight and protect from freezing).

BMI Acrylic 400 will dry to touch in 1-4 hours and will be fully cured in 21 days. Low temperatures, high humidity, driving rains etc. can prolong cure time.