

VERSATILE, LOW-VOC SEALANT FOR EXTERIOR APPLICATIONS
KeeneSeal 300 is a versatile, one-component building envelope sealant designed for exterior penetrations and flashing applications. Its environmentally friendly formula contains no solvents or isocyanates, resulting in very low VOC emissions and low odor. KeeneSeal 300 offers minimal shrinkage and excellent non-sag performance, making it ideal for vertical or overhead use. This moisture-cure hybrid polymer sealant forms a durable, weather-resistant, and UV-stable bond that withstands temperatures from -40°F to 200°F.
FEATURES AND BENEFITS
-
Flexible and durable: Will not shrink or crack over time
-
Very low VOCs: Environmentally friendly and compliant with stringent standards
-
Solvent- and isocyanate-free: Safe for installers and the environment
-
Fast curing: Quick return to service
-
Ready to use: No mixing or special preparation required
APPLICATIONS
-
Driwall™ Drainable HouseWrap
-
Driwall™ HouseWrap
-
Window and door flashing
-
Plywood
-
OSB
-
Concrete
-
Masonry
-
Metal
-
Exterior gypsum
-
Other common building substrates
SIZES AND PACKAGING
Packaging | Color | Product per Case |
10.3 fl/oz Cartridges | White | 24 |
20 fl/oz Sausage | White | 16 |
RESOURCES

PRICE MATCH GUARANTEE
Did you spot a better deal on the same item elsewhere? No worries! At Masonry Direct, we stand by our commitment to offering the best value. Our Price Match Guarantee ensures that if you find the identical product at a lower price, we'll match it. Shop with confidence, knowing you'll receive the quality you want at the best possible price. Simply reach out to our team, and we'll make sure you get the value you deserve.