Caulk-Grade 221 is a 100% acrylic elastomeric caulk used to bridge gaps in flashing, seams, fasteners and penetrations. Caulk Grade 221 is Whipped and thicker than Brush Grade 220.
BENEFITS
- Superior Protection - forms a durable, weather resistant "rubber-like" seal.
- Ideal for sealing holes, cracks and joints.
- Highly flexible.
- 100% acrylic elastomeric caulk, fully compatible with other WeatherStar Elastomeric Products.
- Superior adhesive and cohesive strength.
- Plasticizer-free caulk, will not dry-out or become brittle.
- Contains a strong mildewcide / fungicide.
- Easy to use, easy clean up, non-toxic and VOC compliant water based caulk.
All surfaces to be coated must be clean, dry and free of any oil, grease or dirt. 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.
Caulk-Grade 221 is ready to use. Thinning is not required or recommended.
- Brush: Good quality, stiff synthetic bristle brush.
- Putty Knife: 4 inch, flexible blade.
TECHNICAL DATA
| Color: | White |
| Viscosity: | Min. 140KU @ 25°C / 77°F |
| Density, lb./gal: | 11.25 ± .1 |
| PH: | > 8 |
| Percent solids by Volume: | 66%+/- 1% |
| Flash Point: | Same as water. |
| Tensile Strength at Max Stress: | 200 p.s.i. @ 25°C / 77°F 500 p.s.i. @ -17°C / 0°F (ASTM D-412) |
| % Elongation at Break: | 500% @ 25°C / 77°F 400% @ -17°C / 0°F (ASTM D-412) |
| Permeability: | 3 perms/inch. 20 mils thick coating (ASTM E-389) |
| Recommended Coverage: | As needed. |
| Min. Surface Application Temp.: | 45°F. Do not allow to freeze. |
| Drying Time: | 2-3 hours @ 25°C / 77°F, 50% relative humidity. |
| Packaging: | 5 gallon buckets. |
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