VaproBond™ is a single component 100% silicone sealant used to bind layers of VaproShield membranes to each other or typical construction material surfaces. It can also be used as a liquid-applied flashing component with metal framing systems.

  • Seals overlaps and penetrations
  • Creates durable, structural, air and moisture tight seal
  • Bonds to all VaproShield membranes
  • Flexible in extreme temperatures




  • No primer, easy to gun and apply, offers excellent weatherability
  • Allows for liquid flashing in below freezing temperatures
  • Binds layers of VaproShield membranes to each other and other building materials, creates a watertight, airtight seal
  • Simplifies process of producing watertight, airtight details
  • Remains flexible and pliable in extreme temperatures
  • UV stable, black silicone-based adhesive sealant
  • Meets or exceeds ASTM-C- 920 type S, Grade NS, Class 25
Typical Uses: Sealant

Sealant Image webUse VaproBond adhesive sealant to create a watertight, airtight seal at the vertical seams when installing VaproShield mechanically attached WRB/Air Barriers.

Window Sealant webA. Fully embed head flashing (by others) in VaproBond over Vapro-SS Flashing™.
B. Seal rough opening corners with a bead of VaproBond.

VaproBond Penetrations weba VaproBond I Beam Penetration web

For all penetrations: tool VaproBond evenly at least 2” onto the face and at least 1” out along all sides of the penetration

Typical Uses: Flashing

VaproBond Flashing Components 1017171. VaproFlashing SA Self-Adhered (W: 6 ½”, 11 ¾”, 19 2/3”) is pre-cut field membrane. Simply cut VaproFlashing SA into appropriate lengths and apply to face and inside of rough opening. Saves labor, saves time, convenient.

2. Create waterproof interface by applying VaproBond to inside of rough opening and 1" on face.

Typical Uses: Repair
Repair Detail VaproBond Step 1Membrane hole prior to repair Repair Detail VaproBond Step 2Patch hole with WrapShield SA
Repair Detail VaproBond Step 3Apply VaproBond at a minimum 3/8” bond line to reverse lapped membrane Repair Detail VaproBond Step 4Tool sealant with DRY joint knife, trowel, or spatula

Overview (PDF)

VaproBond Overview 092817 Page 1


VS Testing Thumb 042617

Data Sheet (PDF)

WrapShield SA Self Adhered Product Data 111116 Page 1


VS 108 WrapShieldSA WindowToWallCommercial 041516


wallshield msds Page 1


VaproBond Install Instruct 101117a Page 1