FAQs

Durometer Hardness

Durometer hardness is a property presented on technical data sheets that shows how hard the resin is in the cured state.

A durometer gauge is the actual measuring device consisting of a small drill or blunt indentor point under pressure. Different measurement scales are used for different materials depending on how soft or hard the material.

The following chart compares three (3) different graduated measurement scales and relates hardness values to some common objects.

Shore A Shore D Rockwell M Reference Object
30 Art Gum Eraser
40 Pink Pearl Eraser
50 15 Rubber Stamp
60 Pencil Eraser
70 30 Rubber Heel
80 Rubber Sole
90 45 Typewriter Roller
100 55 Pipe Stem
74 0 Textbook Cover
78 32 Douglas Fir Plywood
82 63
86 95 Hardwood Desktop
90 125 Glass or Formica

The higher the number within each scale, the harder the material. Shore readings are typically used for plastics. Shore A is for softer materials; Shore D is for harder materials. Rockwell readings are typically used for metals.

Mathematical Conversions

The following are some common conversions that might be helpful when utilizing Toagosei products:

  • 1 milliliter (ml) = 1 cubic centimeter (cc)
  • 1,000 ml = 1 liter
  • 29.5 ml = 1 fl. oz.
  • 3.78 liters = 1 gallon
  • 473 ml = 1 pint
  • 454 grams = 1 lb.
  • 500 grams = 1.1 lb.
  • 947 ml = 1 quart
  • 1 kilogram = 2.2 lbs.
  • Weight to Volume: grams ÷ specific gravity = cc (ml)
  • Volume to Weight: cc (ml) x specific gravity = grams
  • Density = specific gravity x 0.99823
  • Centipoises = centistokes x density (at a given temp.)
  • Temperature: Degrees F – 32 x 0.556 = degrees C
  • Temperature: Degrees C x 1.8 + 32 = degrees F
  • Square Inches to Square Feet: ÷ by 144
  • Square Feet to Square Inches: x by 144
  • In./lbs. ÷ 12 = ft./lbs.
  • Ft./lbs. x 12 = in./lbs.
  • 16 in. oz. = 1 in. lb.
  • 192 in. oz. = 1 ft. lb.

Area Coverage

Flat Parts:
Length x Width x Bondline Thickness x 16.4 = cc/ml requirement per part

Non-threaded Cylindrical Parts:
Diameter x Engagement Length x Bondline Thickness (on radius / per side) x 3.14 x 16.4 = cc/ml requirement per part

For no induced gap, make the bondline thickness figure 0.001″; 16.4 is a constant for converting cubic inches to cubic centimeters.

Shelf Life

What is the Toagosei shelf life policy for Aron Alpha branded products?

UNOPENED cyanoacrylate products must be stored under refrigerated conditions at 2°C (36°F) to 8°C (46°F). Storage below 2°C (36°F) or greater than 8°C (46°F) can adversely affect product properties.

Unopened cyanoacrylate products should be brought to ambient temperature before the package is opened. Once opened, it should be left at ambient temperature. Products requiring storage at conditions other than those specified here are labeled accordingly.

Material removed from containers may be contaminated during use. Do not return product to original containers. Toagosei cannot assume responsibility for product that has been contaminated or stored under conditions other than as recommended.

Contact Customer Service 614-718-3855 or 1-800-338-5192 if you need additional information.

Viscosity

Viscosity is a product property associated with all Aron Alpha adhesives and Arontite sealants. Viscosity is defined as a measure of the resistance of a fluid to flow (usually through a specific orifice). A measure of this fluid “thickness” is expressed in centipoise values. The higher the number, the thicker the product. Thicker products are less flowable and, in most cases, will fill a larger gap if necessary.

The following chart relates viscosity to some products we are all familiar with:

Common Item Approximate Viscosity in Centipoise (cps) Cyanoacrylates
Water 1 to 5 201, 221
Kerosene 10 221F
Antifreeze 15
Corn Oil 50 to 100 241F, 202
Maple Syrup 150 to 200
Castor Oil 250 to 500 232, 252F
Motor Oil SAE 60 1,000 to 2,000 203, 203TX
Honey 2,000 to 3,000
Molasses 5,000 to 10,000 253TX
Chocolate Syrup 10,000 to 25,000
Ketchup 50,000 to 70,000
Peanut Butter 150,000 to 250,000 Gel 10
Shortening 1,000,000 to 2,000,000
Caulking Compound 5,000,000 to 10,000,000
Putty 100,000,000 +

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