When you need an insulating tape that maintains its hold despite humidity, moisture, cold, heat, and other challenging conditions, SikaSeal-148 Clear Insulation Seam Tape is hard to beat. It provides a professional-quality hold that's ideal for both indoor and outdoor applications, such as sealing joints and seams, patching damage to wall sheathing, sealing window and door flanges, and building envelopes. Before applying, ensure all surfaces are free of frost, moisture, oil, dust, dirt, and other contaminants. or strength of hold may be compromised. When applying, smooth out wrinkles and provide high pressure for stronger holds.