waterproof is more about how well you tape up your wires or whatever. Can you make a joint mostly waterproof for like the rain? Sure, for under water applications? No, no way.....not with tape. What you want are waterproof heat shrink sleeves, the kind that have a softer interior material that will melt around the join while the out skin squeezes down on to it. Makes an almost hermetic seal.

Would it work on pencils and pens?

I wouldn't use PVC (which most electric tapes are made of) on pencils and pens, especially if kids are going to use the pencils (or pens) afterward and touching the PVC. They aren't kid-safe in terms of toxicity. There are safer alternatives.

my order just came in. why isn't the diminutive size listed in the product information? angry here.

The size specification is called out in inches when it should be called out in millimeters.

would this with leakage for a screw cap? Need to ship some oil and tape around the screw cap

Screw lid on tight. Use a bottle that has a cap liner made of something that will not be affected by the oil; ie. not cardboard. Use 3M 88 black tape. Wrap 2 turns of tape going clockwise (the direction that the cap turns. End the tape on the bottle, not on the tape. Pull the tape out about 2" and move it down to end on the bottle Stretch the tape some but not excessively. The end part on the bottle should not be stretched. Be sure that the tape goes from the cap down to the bottle neck. If you use a plastic bottle, check chemical compatibility. Squeeze the bottle to remove air. This is so that it won't slosh in the package. Stretch the tape some but not excessively. Answer based on 28 years experience in a chemical control laboratory.

Brand	Scotch
Colour	Blue
Material	Polyvinyl Chloride
Number of Items	1
Recommended Uses For Product	Electrical
Special Feature	Strong
Surface Recommendation	Multi Surface
Water Resistance Level	Water Resistant
Size	1/2" x 240"
Tensile Strength	75 Pounds
Compatible Material	Plastic
Global Trade Identification Number	00051131590731, 00616241993522
Manufacturer	3m Company
Model number	10457DS
Item Weight	108 g
Product Dimensions	5.08 x 12.38 x 11.75 cm; 107.73 g
Item model number	10457DS
Item Height	4.63 Inches
Item Width	4.88 Inches
Are batteries included?	No

Scotch 10457DS Electrical Tape

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