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.

Control Material Flow with HV & XHV

Perfect for damming areas like equipment and console cut-outs in hardtops when working with J-Core 4501

For 4501 HV (Higher Viscosity)  & XHV (Extra High Viscosity), we increased the viscosity of our lightweight hard top bonding compound to give you more flexibility.  The higher viscosity allows for daming console and other cutouts to help prevent standard J-Core (4501) from leaking through.  This means less finish work after the cure.

Performance Benefits

  • Great for damming areas to prevent material flow
  • 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

J-Core HV & XHV can also be used in small parts with hand laid skins where more vicosity is required. You’ll still get the light weight, superb cosmetics and low number of costly defects the main product is known for.

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 HV / XHV

POLYESTER BONDING COMPOUND

RECOMMENDED FOR

RECOMMENDED FOR
Hard Tops
Other "Sandwich" Bonds

WORKING PROPERTIES

GEL TIME Gel Time Reaction Time Fixture Time Peak Exotherm
28 min
45 min
73 min
150℉

TYPICAL PHYSICAL PROPERTIES

RECOMMENDED FOR
Color
White
Odor
Styrene
Texture
Smooth
Weight
4.5 lbs/gallon
Shelf Life
3 Months

VISCOSITY

GEL TIME RPM µ Min µ Max
2
130,000
180,000

TYPICAL CURED PROPERTIES

GEL TIME Test Average
Tensile Elongation
6%
Tensile Strength
HV: 1,080 PSI
XHV: 1,000 PSI
Flexural Strength
HV: 7,120 PSI
XHV: 6,400 PSI
Compressive Strength
HV: 1,850 PSI
XHV: 1.500 PSI
Lap Shear
HV: 1,080 PSI
XHV: 900 PSI
Heat Deflection
150℉
Linear Shrinkage
<1%