615 S 4
th
Street, Elkhart, IN 46516-2717 Page 1 of 2
www.bigdogadhesives.com Ph: 833-BIG-DOGG (833-244-3644) July 2018
TECHNICAL DATA SHEET
1. DESCRIPTION
BD320FX is a two-part methacrylate, flexibilized, structural bonding adhesive designed for the
structural bonding of various substrates, including fiberglass, steel, aluminum, and various
plastics (not low energy surfaces). Combined at a ratio of 10:1, BD320FX has a working time
of 8 to 12 minutes and achieves nearly 90 percent of its ultimate strength in 18 to 25 minutes at
room temperature curing. BD320FX provides high strength and very flexible bonds to the
above reference surfaces with generally no preparation effort. BD320FX bonds very strongly
to steel, stainless steel, and aluminum metals and will allow a great deal of movement of the
substrates due to CTE (Coefficient of Thermal Expansion) differences. BD320FX adhesives
are NOT UV STABLE, AND WILL YELLOW OVER TIME and must not be used to create
imperceptible seams in countertops or for seaming countertops. This yellowing will not affect
bond performance, but will affect bond appearance.
Company Identification: Big Dog Adhesives LLC.
615 S 4th Street
Elkhart, IN 46516-2717
Toll-free: 833-BIG-DOGG (833-244-3644)
Fax: 833-BIG-DOGZ (833-244-3649)
Website: www.bigdogadhesives.com lou@bigdogadhesives.com
2. CHARACTERISTICS :
Room Temperature Cure Properties
Working Time 8 to 12 minutes (at 75 F/ 24 C)
Fixture Time 18 to 25 minutes (at 75 F/ 24 C)
Can be Moved In 25 to 30 minutes
Operating Temp. 65 F to 85 F (18 C to 30 C)
Gap Filling .375 inches (3/8 )
Mixed Density 8.1 lbs/gal (.96 g/cc)
Elongation: Greater than 100%
Flash Point 51 F (11 C) See SDS for more safety information
3. CHEMICAL RESISTANCE:
Excellent Resistance to: Susceptible to:
Hydrocarbons Polar Solvents
Acids and Bases Super Strong Acids and Bases
Vinegar
Wine and Condiments
Most Household Foods
4. PHYSICAL PROPERTIES:
Uncured: Resin Activator
Viscosity(cps) 120,000 160,000 50,000 100,000
Color Amber White, various colors
Density (lbs/gal) 8.2 8.5
Mix Ratio (wt or vol) 10 1.0
Mixer Recommendation Cartridge (250/490ml): MFQX 08-24T Square 24 element
Orange/Green Mix Tips (10:1)
BD320FX Structural Methacrylate Adhesive
615 S 4
th
Street, Elkhart, IN 46516-2717 Page 2 of 2
www.bigdogadhesives.com Ph: 833-BIG-DOGG (833-244-3644) July 2018
TECHNICAL DATA SHEET
5. MECHANICAL PROPERTIES:
Tensile Strength (ASTM D638) Substrate Results Failure Type
Strength, psi Fiberglass Surfaces 2,500+ Substrate
Strength, psi ABS/PVC Sheeting 1,000+ Substrate
Strength, psi Steel/Stainless Steel 2,500 3,500 Cohesive
Strength, psi Aluminum 2,500 3,500 Cohesive
6. HANDLING AND APPLICATION:
BD320FX resin (Part A) and activator (Part B) are flammable. Contents include Methacrylate ester
and acids. Keep containers closed after use. Wear gloves and safety glasses to avoid skin and eye
contact. Wash with soap and water after skin contact. In case of eye contact, flush with water for 15
minutes and get medical attention. Harmful if swallowed. Keep out of the reach of children. Keep
away from heat, sparks, and open flames. Do not smoke cigarettes or anything else while handling or
near the product. Refer to the BD320FX Safety Data Sheet for more complete safety instruction. To
assure maximum bond strength, surfaces must be mated together within the specified working time,
and all clamps affixed within that time. Use sufficient material to ensure that the joint is completely
filled when parts are mated and clamped. Avoid over clamping parts, which may cause a dry joint or
a joint starved of adhesive. All adhesive application, part positioning, fixturing, and clamping should
occur before the working time of the adhesive has expired. After the indicated working time, parts
must remain undisturbed until the fixture time is completed. Components bonded, adhesive, and
shop temperature can have a significant effect on the work and fixture time of the adhesive.
Application of BD320FX adhesive at temperatures between 65 F and 85 F (18 C and 30 C) will
ensure proper cure. Temperatures below 65 F (18 C) will slow cure and fixture speed. BD320FX
adhesives will still react, but will take longer. Temperatures above 85 F (18 C and 30 C) will increase
cure and fixture speeds, and there s a risk that the adhesive will be hardened or too thick to bond
materials. The viscosities of BD320FX adhesives are affected by temperature.
NOTE: Because of the curing features of BD320FX adhesives, large amounts of heat are generated
when large masses of material are mixed at one time. The heat generated by the exotherm resulting
from mixing large amounts of adhesive can result in a boiling of the monomer in the adhesive (methyl
methacrylate), resulting in the release of trapped air, steam and volatile gasses. To prevent this, use
only enough material as needed for use within the working time for the product, and confine the gap
or spread out the material to no more than .50 inches.
7. HANDLING AND STORAGE
The shelf life of BD320FX is twelve (12) months from the date of manufacture based upon continuous
storage at room temperature (77 F or 25 C). Storage of BD320FX adhesives in refrigerated
compartments will extend the shelf life even more. Do not store BD320FX adhesive or any other
adhesives in a refrigerator which has food or lunch products in them. Be sure to bring BD320FX
adhesives to room temperature for 24 hours before use, otherwise longer cure and fixture times may
be expected. Long-term storage at temperatures above room temperature will shorten the shelf life of
BD320FX adhesives considerably. Storage at temperatures above 100 F or 38 C could shorten the
shelf life to less than one month. BD320FX adhesives contain no water, so freezing of the adhesive
for short periods is permissible, but is not encouraged.
8. ADDITIONAL INFORMATION
NOTE: Information contained herein is based on tests we believe to be reliable and accurate. It is
offered in good faith for the benefit of the consumer. The Company shall not be liable for any injury,
loss, or damage in the use or handling of its chemical products since conditions and use are beyond
our control. In every case, we urge and recommend the user conduct tests to determine to their
own satisfaction that the product is of acceptable quality and suitability for their particular purpose
under their own operating conditions. Statements concerning possible use of our products are not
intended as recommendations to use our products in the infringement of any patent, or for any
particular purpose or application. These products are intended for industrial use only.