PT7667 A/B Shore D-65 Urethane Casting System


PT7667 A/B is a tough, hard elastomeric material that has superior toughness and abrasion resistance, for good performance in demanding industrial applications. It has a good low mixed viscosity for easy processing, and it will duplicate fine detail pattern surfaces quite well. PT7667 has low initial cured shrinkage, and remains stable throughout its service life.
PT7667 will make extremely durable patterns, dies, fixtures and molds. It has very good tensile strength and high elongation properties, for good long-term toughness. Its excellent abrasion resistance makes it ideal for use in foundry patterns. Being slightly harder than usual candidates for this application, there is less tendency for sand to stick to such patterns. 
PT7667 can be considered a very low hazard potential product, as it does not contain any toxic or regulated raw materials in its makeup. IT does not contain methylene dianiline (MDA), or other potentially harmful aniline derivatives, nor does it contain MBOCA or TDI, and does not include any hazardous or potentially regulated diluents.

 PT7667 A
PT7667 B
ASTM Method
ColorLight Amber
4000 cps
180 cps
Specific Gravity, gms./cc
Mix Ratio, by Weight
100 : 50 
Pot Life, 4 fl oz Mass @ 77°F
20 – 25 min.

** A Black and Red version of PT7667 Part B are available by Special Order.


Generally, with polyurethane elasomers, full properties are developed in 7 days at room temperature (75°F). The nature of this system is to cure somewhat faster, however, so the castings reach full properties sooner than the 7 days. Almost 90% of full hardness is reached in a few hours, and the ultimate cured hardness is achieved in 24-36 hours. This faster “though cure” allows faster tool production rates, and therefore more efficient production. Temperatures below 75°F will lengthen the cure time, and if the ambient temperature is below 60°F, additional heat may be necessary for proper cure. Elevated temperatures will accelerate the cure of urethanes, but care must be taken if a higher temperature is used to cure the material. Generally, the higher the curing temperature, the greater the final cured shrinkage. When heat curing for more rapid processing, to best control shrinkage, the casting should be allowed to set for 12 hours at room temperature before an oven post cure. A typical accelerated curing cycle, therefore, would be: Allow to gel on the pattern for 12 hours at room temperature (70°F-80°F), then post cure for a minimum of 4 hours at 150°F to 165°F and allow to cool before demolding.


Gallon Kit
PailDrum Kit
PT7667 Part A 8 lb.
40 lb.
460 lb.
PT7667 Part B
4 lb.
20 lb.230 lb.
Kit12 lb.
60 lb.
690 lb.

Inasmuch as PTM&W Industries, Inc. has no control over the use to which others may put material, it does not guarantee that the same results as those described herein will be obtained. The above data was obtained under laboratory conditions, and to the best of our knowledge is accurate. This information is presented in good faith to assist the user in determining whether our products are suitable for his application. No warranty or representation, however is intended or made, nor is protection from any law or patent to be inferred, and all patent rights are reserved. Before using, user shall determine the suitability of the product for his intended use, and user assumes all risk and liability whatsoever in connection therewith. In no event with PTM&W Industries, Inc. be liable for incidental or consequential damages. Buyer’s sole and exclusive remedy in such instances shall be limited to replacement of the purchase price.

 PT7667 A/B
ASTM Method
Mix Ratio, by Weight
100 : 50
ColorAmber, Red or Black**
Mixed Viscosity, @77°F, centipoise
2700 cps
Working Time, 4 fl. oz. Mass @ 77°F
20-25 min.
Cured Hardness, Shore D
65 D
Shrinkage, in/in, Mold #1, Vol: .053 Gal.001 in/inD2566
Specific Gravity, grams, cc
Density,  lb./cu in
Specific Volume,  cu. in./lb.
Tensile Strength, psi 
6,558 psi
Elongation at Break, %
633 %
Tensile Modulus @ 100% Elongation2055 psi
Tensile Modulus @ 200% Elongation2551 psi  D412
Tensile Modulus @ 400% Elongation4184 psiD412
Tear Strength, Die C, pli
654 pli
Compression Set, Method B
85 %
Bashore Rebound
52 %
Taber Abrasion, H18 Wheel, 1000 grams load, 1000 cycles, mg loss37 mg

** A Black and A Red Version of PT7667 Part B are available by Special Order. Amber is the standard color.


PTM&W epoxy products are made from raw materials carefully chosen to minimize or even eliminate toxic chemicals, and therefore offer the user high performance products with minimum hazard potential when properly used.  Generally, the PTM&W epoxy resins and hardeners will present no handling problems if users exercise care to protect the skin and eyes, and if good ventilation is provided in the work areas.  However, all epoxy resins and hardeners can be irritating to the skin, and prolonged contact may result in sensitization; and breathing of mist or vapors may cause allergenic respiratory reactions, especially in highly sensitive individuals.  As such, avoid contact with eyes and skin, and avoid breathing vapors.  Wear protective rubber apron, clothing, gloves, face shield or other items are required to prevent contact with the skin.  In case of skin contact, immediately wash with soap and water, followed by a rinse of the area with vinegar, and then a further wash with soap and water.  The vinegar will neutralize the hardener and lessen the chances of long term effects.  Use goggles, a face shield, safety glasses or other items as required to prevent contact with the eyes.  If material gets into the eyes, immediately flush with water for at least 15 minutes and call a physician.  Generally, keep the work area as uncluttered and clean as possible, and clean up any minor spills immediately to prevent accidental skin contact at a later time.  Keep tools clean and properly stored.  Dispose of trash and empty containers properly.  Do not use any of these types of products until Material Safety Data Sheets have been read and understood.