What is T-peel Strength for Adhesion?
Resin & Rubber Adhesion Ranking
(in order of highest T-peel strength)
RLR (Rubber-Like Resin):
A Revolutionary Material Combining
High Tensile Strength and Elongation

Resin & Rubber Adhesion (T-peel Strength) Ranking

What is T-peel Strength for Adhesion?

T-peel strength measures the force required to separate two overlapping thin sheets or films when pulled apart in a T-shape configuration. This is a standard test for evaluating an adhesive's resistance to peeling, particularly useful for determining bonding performance between thin, flexible materials such as metal foils, plastic films, and rubber sheets.
High T-peel strength indicates that the adhesive layer can effectively follow the bending motion during peeling without failing, providing significant advantages in applications requiring flexible and durable bonds. Conversely, rigid and brittle adhesives typically demonstrate low values in T-peel tests, highlighting the importance of designing adhesives that resist not only tension and shear forces but also bending and peeling stresses encountered in real-world applications.

Resin & Rubber Adhesion Ranking (in order of highest T-peel strength)

Rank	Material/Classification	Approximate T-peel strength （N/25mm） [Iron/Iron, Al/Al]	Characteristics and Applications
1	RLR（Rubber-Like Resin）	(Iron/Iron) 94〜127 N/25mm (Al/Al) 128〜418 N/25mm	Combines softness and stretchability with impressive toughness. Highly resistant to puncturing—remains intact even when pierced with a screwdriver. Excellent scratch resistance and shock absorption properties.
2	Urethane-based 1-component/2-component, reactive hot melt, etc.	(Iron/Iron) 30〜50 N/25mm (Al/Al) 20〜40 N/25mm	Features high elasticity and strong resistance to peeling. Commonly used in applications where metal adhesion is critical, such as automotive components and building materials. Two-component and moisture-curing formulations typically maintain flexibility after curing, often resulting in particularly high T-peel strength.
3	Acrylic-based Elastic adhesives / Structural acrylics	(Iron/Iron) 20〜40 N/25mm (Al/Al) 15〜30 N/25mm	Grades with high adhesive strength and elasticity demonstrate excellent performance in T-peel testing. Frequently used for strong metal bonding applications such as automotive exterior emblems and industrial-grade acrylic foam tapes. Available in various formulations including UV-curable and two-component systems.
4	Modified Silicone / MS polymer-based	(Iron/Iron) 10〜30 N/25mm (Al/Al) 10〜25 N/25mm	Combines the excellent weather resistance of silicone with relatively good peel strength, though not matching urethane-based systems. It is also used for sealing in architecture and civil engineering, including around aluminum sash frames. Many formulations bond effectively to both steel and aluminum without requiring primers.
5	Silicone-based Elastic Adhesives and Sealants	(Iron/Iron) 5〜20 N/25mm (Al/Al) 5〜15 N/25mm	Excellent heat and weather resistance, though typically exhibiting somewhat lower metal adhesion compared to urethane or acrylic systems. Can achieve relatively high peel strength when proper surface preparation and primers are used.
6	Rubber-based Adhesives/PSAs SBR, NBR, SIS, SBS, etc.	(Iron/Iron) 5〜15 N/25mm (Al/Al) 5〜10 N/25mm	Strong initial tack, but generally lower permanent metal adhesion strength compared to acrylic and urethane systems. In typical applications such as cloth tapes or OPP tapes with rubber-based adhesives, T-peel values typically range from a few N/25mm to around 15 N/25mm.
7	Epoxy-based standard rigid type	(Iron/Iron) 2〜10 N/25mm (Al/Al) 2〜10 N/25mm	High rigidity with excellent tensile and shear strength, but significant post-cure brittleness makes these systems generally weaker in bending and peeling modes such as T-peel testing. Rubber-modified epoxy formulations can improve T-peel values to approximately 10-20 N/25mm.

*Please note that the values presented in this ranking are general guidelines only. Actual values may vary significantly depending on the manufacturer, specific grade, and formulation.

RLR (Rubber-Like Resin): A Revolutionary Material Combining High Tensile Strength and Elongation

Traditional resin materials have struggled to balance flexibility and durability. To overcome this challenge, we've developed Rubber-Like Resin (RLR), which combines rubber-like flexibility with exceptional durability.

This innovative material features superior elasticity and scratch resistance, while also providing excellent vibration absorption and chemical resistance. Since it cures at room temperature, no heating furnace is required—contributing to energy efficiency. RLR can be utilized across diverse applications, from electronic component coatings to construction materials and automotive parts.

Key Advantages of Rubber-Like Resin Compared to Urethane Materials

Learn More About Rubber-Like Resin

1,000% elongation rate with tensile strength exceeding 10 Mpa

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