MasterJoint PRI 691

Single Component Polyurethane Based Adhesion Primer

What is MasterJoint PRI 691?

MasterJoint™ PRI 691 is a fast curing, single component, moisture curing, clear polyurethane or polyurea adhesion promoting primer. MasterJoint™ PRI 691 contains solvent.

Areas of Application

• MasterJoint™ PRI 691 is designed for use as an adhesion promoting primer on MasterJoint™ membranes. Its uses include the application of a new membrane to an aged membrane e.g. in repair applications.

• It can also be used on aged membranes when renewing or repairing the UV protective top coat.

• MasterJoint™ PRI 691 can also be used as a primer on sand broadcast epoxy primers prior to the application of a spray applied membrane in applications where the membrane is permanently exposed to water.

Characteristics and Benefits

• Excellent adhesion to aged membranes especially in applications where the membrane is permanently exposed to water

• Rapid cure

• Low viscosity

• Easy to apply