Premium Bonding & Filling Compounds for the Composites Industry

Light Weight Compounds

When Light is The Right Weight for the Job, Call Arjay

If light weight is a major factor in the selection of a bonding compound, Arjay offers several excellent choices:

1001 – This is our original product in the light weight group. It represents our best tradeoff between weight (5.9 pounds per gallon) and economy. And it has surprisingly high physical properties with a lap sear of 1,200 psi.

1041 – The addition of a high aspect ratio (length to width) mineral filler increase the weight slightly (6.2 pounds per gallon), but improves the physical properties where the application leans more toward bonding than filling.

1421 – The incorporation of milled fibers makes this product an even better choice when looking for outstanding physical properties in a lighter weight (6.8 pounds per gallon) bonding compound. In combination with a more resilient resin base, the fibers result in extremely tough bonds for a light weight compound.

1402 – This is our pumpable light weight material available in 55 gallon drums. It is formulated with a tough microsphere that will resist the shear and pressure produced by pumping equipment. The 6.2 pounds per gallon density and its pumpability make it an excellent choice for use in higher volume performance boat applications.



Q. How much weight can we save by using a lighter weight product?

A. For every 5 gallon pail used the weight savings will be about 9 to 13 pounds compared to a typical medium weight compound.

Q. Will we have to sacrifice bonding strength?

A. Because of the use of a higher proportion of microspheres, physical properties of the lighter weights tend to be somewhat lower than their medium weight cousins. However, sound engineering involves recognizing when the application is utilizing a product with unnecessarily high physicals at the expense of weight.

Q. Aren’t lighter weight materials going to cost us more money?

A. Usually, yes. This is due to two factors. First, the usage of medium weights is much greater than light weights and this has an obvious effect on prices. The second factor, however, is not as clear cut and warrants mention.

There is a tendency with bonding compounds to compare prices on a weight per pound basis as is done with resins and gel coats. The problem is the wide differences in product density of bonding compounds and the resulting effect on price per pound. Whatever unit of measure system is used internally with regards to ordering and stocking bonding compounds (pounds, gallons, eaches), when price shopping, the comparison logically has to be dollars per gallon. As long as the comparison is made on a cost per volume basis, light weights are not going to be outrageously over priced.