Acrylic Butter-Grade 221

Acrylic Butter-Grade 221 is a water-based, high solids elastomeric sealant utilizing the latest advances in advanced acrylic technology. Acrylic Butter-Grade 221 is manufactured from a unique acrylic resin specifically designed to provide increased tensile strength and elongation. Acrylic Butter-Grade 221 is whipped and thicker than Brush-Grade 220.

  • Excellent adhesion to multiple substrates
  • Reflects 80-90% of heat caused harmful UV rays
  • Easy to use, easy to clean up, and non-toxic
  • Reduces daily expansion and contraction (thermal cycling) of roofing substrate
  • VOC compliant and resistant to dirt pick-up

5-gallon pail, 2-gallon pail


White, Gray

Acrylic Butter-Grade 221 is ideally suited for sealing mechanical fasteners and vertical seams on metal roofs, as well as around flashings, drains and penetrations on most roof surfaces. It has excellent adhesion to asphaltic roofing, metal, concrete, wood, and polyurethane.

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  • Metal
  • Modified Bitumen
  • EPDM
  • Single-ply
  • Smooth BUR
  • Concrete
  • SPF
Surface Prep:

All surfaces to be coated must be clean, dry, and paintable. It may be necessary to power wash and/or prime to enhance adhesion. See application specification for more details.


All surfaces to be coated must be cleaned properly. Power washing is recommended. Any existing coating must be checked for good adhesion. Before application, any loosely adhered coating must be removed and bare surfaces must be prepared, cleaned and checked for compatibility. Acrylic Butter-Grade 221 is a ready-to-use product. Thinning is not required or recommended.


Acrylic Butter-Grade 221 is designed for positive drainage. Areas of ponding water must be addressed before product is applied.

Application Coverage (1 gallon) Width Wet Mils Average Dry Mils
Seams 75 linear ft. 4″ 48 30
Flashing Details 33 linear ft. 6″ 76 50

*Coverage rates listed are estimates based on typical conditions.

  • Brush
  • Bulk Gun
  • Roller
  • FM Approved
  • CRRC
  • Miami-Dade County
  • Florida Product Approval
  • UL

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