Vaproshield BlockFlashing. A self-adhered, non-asphaltic, durable, air, water, and vapor barrier flashing with an aggressive pressure-sensitive adhesive that does not require a primer and is easily applied to most construction substrates.
BlockFlashing is designed for use as a rough opening flashing or transition flashing providing a barrier against water, air, and moisture infiltration.
Impermeable to air, moisture vapor, and water. No VOCs. 12-month UV and weather exposure makes membrane ideal for long-term projects.
All weather installation membrane can be applied in virtually all weather conditions including below freezing 0 degrees F (-18 degrees C) and rising without the use of primer.
Installation is this simple. Ease of application. Trouble free performance.