Preformed Seals

Preformed Seals are concrete joint sealing products manufactured by extrusion molding of neoprene compounds. They are compression-inserted into concrete pavement joints to block foreign material infiltration and maintain joint functionality stably over the long term.

Compliant with ASTM D2628, DOT (U.S. Department of Transportation), and FAA (Federal Aviation Administration) standards, they are applied to various concrete pavement joints including expressways, airport runways, and bridges. With diverse designs of 4-cell, 5-cell, and 6-cell configurations, optimized curing time, and resistant neoprene material, they guarantee a long service life of 15 to 25 years.

25 yrs

Preformed Seal (15~25 yrs)

10 yrs

Silicone Sealant (6~10 yrs)

3 yrs

Hot Asphalt (2~3 yrs)

Multi-Cell Structure Design

Various cell structure designs including 4-cell, 5-cell, and 6-cell allow selection of the optimal product for joint width and depth. The cell structure evenly distributes compression forces, ensuring long-term sealing performance.

Optimized Curing Time

Curing conditions of the neoprene compound are optimized to achieve uniform physical properties. It stably responds to contraction and expansion caused by temperature and humidity changes while maintaining consistent quality.

Chemical-Resistant Neoprene

Using highly resistant neoprene material, it provides excellent durability against external environmental factors such as ozone, UV rays, and oil. It maintains stable recovery even in extreme temperature environments (-19 to 100 degrees C).

Test Item	Test Standard	Required Specification
Tensile Strength (Minimum)	ASTM D412	13.8 MPa
Elongation at Break	ASTM D412	250%
Elongation Reduction	ASTM D573	Max. 20%
Tensile Strength Loss After Oven Treatment	ASTM D573	Max. 20% loss
Oil Swell Rate	ASTM D471	Max. 45%
Hardness Change	ASTM D573	1~+10 point
Ozone Resistance	ASTM D1147	No cracking
Low-temp Hardness (-10°C)	ASTM D2240	0~+15 point
Low-temp Recovery (-10 degrees C, 72 hrs)	ASTM D2628	Min. 88%
Low-temp Recovery (-19 degrees C, 22 hrs)	ASTM D2628	Min. 83%
High-temp Recovery (100 degrees C, 70 hrs)	ASTM D2628	Min. 85%
Bending Compressive Strength	ASTM D2628	Min. 613 N/m

Product	Width (W mm)	Height (H mm)	Min. Depth (B mm)	Install Width (A mm)
E-437	11.11	11.43	25.40	6
E-562	14.29	15.88	28.58	8
E-686	17.46	17.46	31.75	10
E-816	20.64	20.64	38.10	13
E-1006	25.40	25.40	44.45	14
E-1256	31.75	25.40	50.80	20
V-1625	41.28	28.58	60.33	22
E-2000	50.80	38.10	66.68	29
E-2500	63.50	63.50	101.60	35
E-3000	76.20	73.50	107.95	45

Ozone Resistance

Confirmed no cracking in ozone exposure testing per ASTM D1147 standards. Possesses strong resistance to deterioration caused by atmospheric ozone.

Oil Resistance

Oil swell rate within max. 45% per ASTM D471 standards. Excellent chemical resistance to oil spills on roads.

Temperature Resistance

Maintains recovery rate of 83~85% or higher in the extreme temperature range of -19 degrees C to 100 degrees C. Operates stably in both summer heat and winter cold.

Aging Resistance

Property loss within max. 20% under 70 hrs / 100 degrees C conditions per ASTM D573 standards. Minimal performance degradation even with long-term use.