SCIGRIP / Arjay Technologies

J-CORE for Hardtops

Go Beyond Lightweight with the bonding  compound specifically made for hardtops and small part sandwich bonds.  J-Core reduces the overall weight of your boat and provides and strong, dependable bond.

Taking Hardtops Beyond Light Weight

4501's ultra-light weight makes it the perfect compound for bonding hardtops and small part sandwich-style bonds

Weighing in at the incredible light weight of less than 5 pounds per gallon, you will almost wonder how one of our most popular bonding compounds can possibly be as strong as it is.  The secret to J-Core’s success is its unique blend of physical properties.  It allows for aggressive material substitutions that can save material and labor costs in almost any application.

Performance Benefits

  • Pumps great, and trowels easily
  • Flows well under moderate clamping pressure
  • Stays put when mold is flipped
  • Cures with low exotherm for better cosmetics
  • Available in higher viscosities for damming and more

Perfect for Small Part "Sandwich" Bonds

The use of J-Core in small parts with hand laid skins is surprisingly efficient and results in light weight, superb cosmetics and an extremely low number of costly defects requiring repair.

J-Core in Action

Easy to Apply

Pumping J-Core into the hardtop shell

hardtop3

Spreads to Fill

Material flows to fill edges when marrying inner liner

SANDWHICH

Sandwich Bonds

Great for small part sandwich style bonds

Availability

Table Header REGULAR & HIGH VISCOSITIES
J-Core 4501, 4501 HV, AND 4501 XHV Bonding Compounds
5 Gal Pail | 55 Gal Drum

TECHNICAL DATA

4501 J-Core

POLYESTER BONDING COMPOUND

RECOMMENDED FOR

RECOMMENDED FOR
Hard Tops Other "Sandwich" Bonds

WORKING TIMES (In Minutes)

GEL TIME Gel Time Interval Total Peak Exotherm
28 45 73 150℉

TYPICAL PHYSICAL PROPERTIES

RECOMMENDED FOR
Color White
Odor Styrene
Texture Smooth
Weight 4.8-5.1 lbs/gallon
Stability 3 Months

VISCOSITY

GEL TIME RPM µ Min µ Max
2 50,000 65,000
20 18,000 28,000

TYPICAL CURED PROPERTIES

GEL TIME Test Average Deviation
Tensile Elongation 8.2% 0.32%
Tensile Strength 1,060 PSI 108 PSI
Flexural Strength 6,960 PSI 314 PSI
Flexural Modulus 357,000 PSI 14,100 PSI
Compressive Strength 1,910 PSI 52.5 PSI
Lap Shear 1,100 PSI 11.0 PSI
Heat Deflection 150℉ 5.0℉
Linear Shrinkage <1%