3M

3M 851 Polyester Printed Circuit Board Masking Tape

3M™ Circuit Plating Tape 851 with polyester film and blended silicone and rubber adhesive used for PCB masking and other high temperature applications.

Low-stretch polyester film can be applied by machine or by hand
Polyester backing reduces stretch and recovery of tape associated with uneven stop-off line
Thick adhesive coating reduces undercutting because adhesive blocks out solutions between fingers

Color: Green

Backing/Carrier Material: Polyester Film

Adhesive Type: Silicone/Rubber Blend

TotalThickness: 3.6 mil

Overview
Customize
Features
Specifications
Compliance
Resources

Overview

Consult

Specify a finalized design or create a new one from scratch with our experienced converting experts.

Design

Pair our material sampling library with our precision converting capabilities to optimize and validate a prototype.

Produce

Rely on our top-tier suppliers, strict quality controls, and hands-on help to ensure your product's effectiveness throughout its lifecycle.

Customize

Customize This Material

Our wide range of converting capabilities allow us to take this material and transform it into the right width, length, shape or fabricated part to not only achieve ideal integration into your end use, but also optimize how you apply the material in your application. Our converting equipment paired with our expert engineering team will help you create the exact custom solution for your unique requirements.

To learn more about the most common converting services we offer, or to contact our team to start discussing your solution, please utilize the below links:

Tape Slitting

Die-Cutting

Custom Part Fabrication

Prototyping

Custom Length Rolls

Features

Low-stretch polyester film can be applied by machine or by hand
Polyester backing reduces stretch and recovery of tape associated with uneven stop-off line
Thick adhesive coating reduces undercutting because adhesive blocks out solutions between fingers
Specially designed adhesive that generally performs better when no ovens are used to heat tape and boards
Solvent clean up of the board is recommended to facilitate subsequent soldering
Polyethylene tape core instead of cardboard

Specifications

Color	Green
Backing/Carrier Material	Polyester Film
Adhesive Type	Silicone/Rubber Blend
Total Thickness	3.6 mil
Backing/Carrier Thickness	0.9 mil
Adhesive Thickness	2.7 mil
Adhesive Strength	29 oz/in
Tensile Strength	26.8 lb/in
Elongation	124%

Compliance

We value the importance of up to date an accurate regulatory information on the products we work with. For the most current Compliance and Regulatory information on your product of interest, please contact our experts for assistance.

Resources

Technical Data Sheet