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3M Urethane Foam Tape [Single-Sided, Open Cell] (4300 Series)
3M 4300 Series Urethane Foam Tape is a conformable, grey, low-density, open-cell single-sided foam tape with pressure-sensitive acrylic adhesive coating. The adhesive is protected by a 0.003 inch (3 mil) thick tan, silicone-treated paper liner and has a very soft, conformable low-density foam which can help seal out air, dust, and light when compressed 50%. Has high absorbency to trap moisture, dust, and contaminants. Application ideas include recessed lighting, door, window, and cabinet seals. It also can be used to help cushion, damp sound and absorb vibration in electronics such as printers, keyboards, computers, aircraft lights, and automotive dashboards. The adhesive has excellent long-term aging and ultimate high bond strength to a variety of surfaces as well as good temperature performance. Please note extra care should be taken when handling these delicate rolls of tape to avoid having tape fall off the tape core. Made in the U.S.
3M Urethane Foam Tape (4300 Series)
- Carrier/Backing: urethane foam
- Adhesive: acrylic How are adhesives different?
- Release Liner: tan paper
- Thickness: 3 mils (liner) What is mil thickness?
- Tensile Strength: 25 pounds per inch (longitudinal)
- Service/Operating Temperature: -20°F to 150°F
- Application Temperature: 50°F to 100°F
- Elongation: 125%
- Density: 2 pounds per cubic foot
- Compression Deflection (25%): 0.3 psi
- Core: 3" diameter
- Country of Origin: United States
Note: Specifications are those given by manufacturers and are not tested for accuracy.
Question & Answers
[ viewing questions 1 through 1 of 1 total ]
Russ Youngren Jan 21, 2021
QUESTION: looking for open cell 3/16 x 3/8 wide so it will compress to almost nothing. the closed cell stays to fat and the meeting rails do not line up. used to be able to buy everywhere now I see only closed cell and it is to hard
: Pres-On P-8500 is an open-cell foam we carry in a few other sizes - see https://www.findtape.com/p1364/?tid=30
. We can inquire with them for a custom order for 3/16" thick x 3/8" wide, but minimums would start at 1 case for non-stock custom sizes. Thank you.
hot melt rubber (synthetic)
Offers the widest range of application flexibility available. Exhibits excellent processing performance whether manually or automatically applied. Has superior tensile strength, adhesion properties and holding force which ensures consistent, reliable seals. Hot melt adhesive will bond faster to a surface which is referred to as quick-grab or quick-stick. It typically has higher tack (will feel stickier to the touch), but is also softer. It has lower heat resistance, shear resistance, and sometimes UV resistance than an acrylic adhesive. NOTE: it is called hot melt because the adhesive is applied hot by the manufacturer and then hardens as it cools (you do not need to apply heat to the tape yourself).
Properties are similar to that of hot melt rubber, but natural rubber often holds where other adhesives won't (recycled fibers, dust, cold, heat and heavy loads). It provides good overall adhesion and moisture resistance.
Offer excellent performance, especially for applications in temperatures less than 40°F and greater then 120°F. It provides excellent clarity, has high shear strength, is usually more permanent/durable even when exposed to moisture, and it ages well over extended periods in fluorescent and sunlight. Since it remains clear for the life of the application and does not yellow over time it is ideal for applications such as sealing white cartons. While it has good initial adhesion it does take 24-48 hours to cure and to achieve its maximum bond strength (has gradual adhesion buildup). Another difference between hot melt rubber and acrylic adhesive is if you fold tape over making the two adhesive sides touch the acrylic adhesive will remain attached to the carrier (e.g. paper, film) while a hot melt adhesive will stick to itself and pull off of the carrier. It is the best choice for clarity, UV resistance and aging characteristics.
Is great for extreme temperature applications since silicone adhesive can work in continuous operating temperatures from -100°F to 500°F. They also exhibit good chemical resistance, retain electrical properties, and remove cleanly with little or no residue.
Zinc oxide based adhesive formula is a skin-friendly adhesive which is commonly used on sports medicine tapes.
Thickness, AKA caliper or gauge, refers to the distance from one surface of a tape backing, or adhesive, to the other.
1 mil = 1/1000 of an inch
Examples: 1/16 inch = 62.5 mils; 1/32 inch = 31.25 mils