User Guide

Repair Procedure
If damage to the 3M™ Polyurethane Protective Tape has occurred, a "field" repair
can be made as follows:
1. Carefully trim with a razor blade or knife any areas of damaged or loose tape.
Avoid damaging the corrosion protection layer beneath the tape.
2. Remove the tape and clean the area according to the removal instructions. If
functionality and speed of repair are more important than looks, do not be too
concerned about removal of all adhesive residue.
3. Decide whether you wish to make a flush patch or an overlap patch. Overlap
patches are faster but may not look as aesthetically pleasing.
4. Cut a piece of repair tape to the size required. If this is an overlap patch, cut to
allow for a 1" - 1
1
/2" overlap. If this is a flush patch, allow for a
1
/8" gap to be
filled with a sealant. The smaller the gap, the better.
5. Prime area with primer such as 3M™ Adhesion Promoter 86A using the
minimum amount necessary to achieve complete coverage. If this is to be an
overlap patch, prime the overlap area of the tape to overlaped with the patch.
You may wish to mask adjacent areas for neatness.
6. Remove liner of the patch and carefully apply the patch to the area using a
rolling down motion to exclude air and accommodate surface irregularities. Do
not put patch down and attempt to reposition it. Roll down or wipe down firmly
to ensure complete adhesion.
7. If this is a flush patch, or if you desire to seal the edges of an overlap patch, use
3M™ Scotch-Weld™ Epoxy Adhesive 2216 B/A, 3M™ Scotch-Weld™ Epoxy
Adhesive DP190, or 3M™ Scotch-Weld™ Urethane Adhesive 3532 B/A
according to the mixing instructions to fill the gaps around the patch. A piece of
masking tape or clear polyester tape can be used over the seam to smooth the
application and insure that the sealer stays in place while curing takes place.
8. The patch will be serviceable immediately if edge sealer was not used, or as
soon as complete cure of edge sealant is accomplished. Scotch-Weld 3532
adhesive will cure adequately in 1 hr. at 80°F. Scotch-Weld 2216 or DP190
adhesives will cure adequately in 24 hrs. @ 80°F.
9. Paint if desired according to your normal painting procedure. Best adhesion of
paint to polyurethane protective tape is accomplished with a wipe of MEK
before topcoat paint. It is not desired to prime the polyurethane protective tape
before topcoat paint is applied.
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Technical Bulletin
Polyurethane Protective Tape