3M Scotch Super 33+ Electrical Tape 3/4 in x 20 ft - Premium

In this review the focus is on practical performance: the 3M Scotch Super 33+ is a premium grade vinyl electrical tape intended for professional use where reliable insulation and weather resistance matter. Its single biggest reason to buy is predictable, long-term primary insulation up to 600V with proven resistance to UV, moisture and abrasion, making it a dependable choice for electricians and technicians who need a moisture-tight, conformable wrap that holds in harsh environments.

Key Features

• Professional tape grade: Designed for above- and below-grade, indoor and outdoor use and suitable for low and high voltage applications up to 600V.
• Wide temperature range: Rated to perform continuously in ambient temperatures up to 221F and conformable down to 0F, so it stays flexible across extreme conditions.
• All-weather durability: The vinyl backing resists UV, abrasion, moisture, alkalies, acids and corrosion to protect splices and cable jackets outdoors.
• Moisture-tight protection: Elastic PVC backing plus aggressive rubber-based adhesive provides electrical and mechanical sealing with minimal bulk.
• Compatibility: Works with solid dielectric and synthetic cable insulations and common splicing compounds, reducing risk of chemical incompatibility on repairs.
• Certifications: Meets CSA, IEC and UL-related standards and carries VDE marks license for industrial and occupational use.

Who It's For

The 3M Scotch Super 33+ is aimed at electricians, industrial maintenance crews, telecom technicians and automotive pros who need a robust, professional-grade insulating tape for splices, harnesses and outdoor terminations. It is particularly useful where exposure to sun, moisture or chemicals is likely and where a conformable, stretchable wrap is required.

It is not intended as a consumer hobby tape for non-electrical craft uses; contractors who require thicker or specialty tapes for very high-voltage transmission beyond 600V or non-PVC systems should consider other specialty products.

Pros & Cons

Pros

• Excellent adhesion and stretchability, making clean, tight wraps that stay secure in cold weather.
• Strong resistance to UV, moisture and abrasion extends service life on outdoor runs.
• Moisture-tight seal with minimal bulk due to elastic PVC backing and rubber-based adhesive.

Cons

• Pack and roll dimensions may feel small to some users given the industrial price; several customers noted mixed opinions about roll size versus cost.

Specifications

Brand	3M Scotch Super 33+
Size	3/4 in x 20 ft per roll
Thickness	7 mil nominal vinyl
Temperature range	0F to 221F (-18C to 105C)
Voltage rating	Primary insulation for splices up to 600V
Certifications	CSA, IEC 60454-3-1-7/F-PVC P/90, UL Listed, VDE marks license

Our Verdict

The Super 33+ is a solid, professional electrical tape that justifies its cost for technicians who need reliable insulation and weather resistance. It excels where conformability, adhesion and chemical resistance are required, making it a good long-term value for industrial and field use; budget-minded buyers should weigh roll length versus frequency of use.

Frequently Asked Questions

Is this tape suitable for outdoor terminations?
Yes. The vinyl backing resists UV, moisture and abrasion and the adhesive creates a moisture-tight seal suitable for outdoor splices.

Can it be used in cold weather?
Yes. It remains conformable down to 0F, allowing effective wrapping and sealing in freezing conditions.

What voltage can it insulate?
It is rated for primary insulation of splices up to 600V for typical low- and medium-voltage applications.