SEALGUARD VFI-993 Flashing Grade Silicone can be applied by brush, trowel or putty knife. This product is a single component, thick paste, so no mixing or proportioning is necessary. Just dispense and apply.
The surface must be cleanand dry and free from contaminants (i.e. oils, mud and grease) that will cause negative effects on adhesion. Simply, dispense the product and apply over areas to be sealed to desired thickness using application tools of choice.
Primers are typically not required. On a typical or questional substrates, a sample should be tested for adhesion to make sure no primer is needed.