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Contractor-Focused Masonry Supply — Delivered Nationwide
Contractor-Focused Masonry Supply — Delivered Nationwide

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KeeneSeal 300 by Keene Building Products, a high-performance waterproofing sealant for masonry and foundation walls

KeeneSeal™ 300

SKU 01-X-0198
by Keene Building Products
$354.00 - $386.67
$354.00
$354.00 - $386.67
$354.00
240.0floz | $14.75 / 10floz

Ships in 1–2 Weeks

Once an order is placed, no changes, cancellations, or returns are accepted.
Request a quote

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

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+1 (833) 246-3900

Email Us

sales@masonrydirect.com

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Free Shipping

On orders over $2,500

FAQ

How do I track my order?

Once your order ships, you will receive a shipping confirmation email with your tracking number and carrier details.

You can also track your order anytime by visiting our tracking page below and entering your order information:

👉 https://www.masonrydirect.com/apps/tracking

If you have trouble locating your tracking information, please contact our support team with your order number and we’ll be happy to assist you.

Do you offer free freight?

Yes, we offer free freight on orders over $2,500.

How long does shipping take?

Most orders ship and deliver within 4-8 business day.

Can I order in bulk or wholesale quantities?

Yes. We specialize in bulk and wholesale orders. Use our Wholesale Order form or request a quote.

Can you help me choose the right product?

Yes. Our team can review specs and recommend the correct product for your project.

Who do I contact with questions?

Call (833) 246-3900 or email sales@masonrydirect.com.