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Application Profile

Market: Construction

Application Description: Splicing together fiberglass web in the manufacture of asphalt shingles and roofing materials.

Application Method


Manual operation where the mat materials are cut and a 4” – 6” wide piece of

3MThermosetable Glass Cloth

365 or 3650 is applied. Heat is applied either by hand or may be automated.

Tape 365 and 3650


Key Application Requirements

Splicing material that has equal or greater tensile than the fiberglass mat. Low profile. Must be able to make splice quickly (~ 30 - 90 seconds) Strength of bond must equal or exceed tensile of fiberglass mat. Reliable splice at temperatures up to 400ºF. Splice material is attached over entire surface of glass mat so entire surface is coated. Material must be coatable with asphalt mixture. For high slope shingles where rotary cutting is employed, it is best if carbide blades are used on the tool vs. tooled steel, particularly in operations with high through-put.

Benefits/Advantages To Customer

Superior reliability: Splices made with 3MThermosetable Glass Cloth Tapes 365 and 3650 have superior reliability compared to hot melt glue splices, particularly in “bath” coating operations.

Lower Profile: 3M™ Thermosetable Glass Cloth Tape provides a thinner splice than an overlapping glue splice, resulting in less change to finished shingle profile.

Resists moisture: Butt splices made with 3M tape provide complete adhesive coverage for the spliced web leaving no overlapping uncoated mat to absorb moisture.

Helps reduce maintenance: Use of tape eliminates the use of hot melt glue guns, eliminating the time needed to clear plugged nozzles and routine maintenance time for glue gun heads.

Tensile strength: Tensile strength of the 3M tape and the finished spliced

produced is greater than that of the fiberglass web.

3M Industrial Business


Operator precuts the length of 3M™ Thermosetable Glass Cloth Tape 365 or 3650, which is necessary as time spent is critical to the operation. Near the end of the fiberglass jumbo, they bring in the start of the new jumbo and make a butt splice. Tape 365/3650 is applied by hand over the two jumbo ends and smoothed down. Heat is applied via an iron that is at least 500°F and up to 800°F. The tape is ironed until the backing becomes a light tan. The jumbo is released and goes through the accumulator and coating process.

SIC Code

2952-0100 - Asphalt felts and coatings

2952-0101 - Roofing Materials

2952-0102 - Brick siding, asphalt

2952-0103 - Coating compounds, tar

2952-0105 - Insulating siding

Key Decision Makers

Product Manager

Production Manager

Plant Manager

For Additional


To request additional product information or to arrange for sales assistance, call 1-800-362-3550. Address correspondence to: 3M Industrial Business Customer Response Center, Building 21- 1W-10, 900 Bush Avenue, St. Paul, MN 55106. Our fax number is 651-733-9175. In Canada, phone: 1-800-364-3577. In Puerto Rico, phone: 1-787-750-3000. In Mexico, phone: 52-70-04-00.

Product Use

All statements, technical information and recommendations contained in this document are based upon tests or experience that 3M believes are reliable. However, many factors beyond 3M’s control can affect the use and performance of a 3M product in a particular application, including the conditions under which the product is used and the time and environmental conditions in which the product is expected to perform. Since these factors are uniquely within the user’s knowledge and control, it is essential that the user evaluate the 3M product to determine whether it is fit for a particular purpose and suitable for the user’s method of application.

Warranty and

Limited Remedy

Unless stated otherwise in 3M’s product literature, packaging inserts or product packaging for individual products, 3M warrants that each 3M product meets the applicable specifications at the time 3M ships the product. Individual products may have additional or different warranties as stated on product literature, package inserts or product packages. 3M MAKES NO OTHER

WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTYARISING OUT OFA COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. User is responsible for determining whether the 3M product is fit for a particular purpose and suitable for user’s application. If the 3M product is defective within the warranty period, your exclusive remedy and 3M’s and seller’s sole obligation will be, at 3M’s option, to replace the product or refund the purchase price.


Except where prohibited by law, 3M and seller will not be liable for any loss or damage arising

of Liability

from the 3M product, whether direct, indirect, special, incidental, or consequential, regardless of

the legal theory asserted, including warranty, contract, negligence, or strict liability.


Industrial Business

Printed in the USA

Building 21-1W-10, 900 Bush Avenue


© 3M 2006

St. Paul, MN 55106