PT4455 Iron Filled Surface Coat & Die Casting Resin


PT4455 is a highly filled epoxy casting resin with excellent handling and cured properties. It works quite well in a variety of tooling applications. A very high percentage of iron filler has been used to give the finished castings very low shrinkage and good toughness for long term durability. The cured surfaces of castings made with PT4455 have non-galling characteristics for various forming die applications, where surface finish of the parts is critical. PT4455 is an ideal material for such applications as core boxes and match plates, forming dies, fixtures, molds, patterns and any other uses where durable, extremely low shrink castings are required. 

 PT4455 Part APT4455 Part B PT4455 Part B1
ASTM Method
Viscosity, @77F, centipoise
42,000 cps
50 cps
850 cps
Specific Gravity, gms./cc
Mix Ratio 100 : 6 100 : 12PTM&W
Pot Life, 4 fl. oz. Mass @77F 50 – 60 min.2 – 3 hr.D2471


Both PT4455 hardeners will cure completely at room temperature with no added heat required. Castings made with the PT4455 Part B hardener may be demolded after 18 to 24 hours at 77o F, depending upon the size of the casting. Castings made with the PT4455 Part B1 hardener usually require a full 24 hour cure. If a shorter cure time is necessary, the casting may be given an oven post cure after a room temperature gel. If this is desired, check with our technical department for curing guidelines. Heat curing will increase shrinkage.


Gallon Kit
PT4455 Part A14 lb.
60 lb.
PT4455 Part B
.88 lb. 3.75 lb.
PT4455 Part B11.71 lb.
7.25 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.

 PT4455 A/BPT4451 A/B1ASTM Method
Mix Ratio, By Weight100 : 6100 : 12PTM&W
Mixed viscosity, @77F, centipoise18,000 cps8,500 cpsD2393
Cured Hardness, Shore D90 Shore D89 Shore DD2240
Shrinkage, in./in.  ,  in./ft.00396, .0475.00372, .0451D2566
Specific Gravity, grams, cc2.242.04D1475
Density,    lb./cu in..0809.0738D792
Specific Volume,   cu. in./lb.12.413.6D792
Tensile Strength, psi,8300 psi8,500 psiD638
Flexural Strength, psi9,400 psi9,750 psiD790
Compressive Strength, psi17,500 psi18,800 psiD695
Heat Deflection Temperature @ 264 psi144F143FD648
Water Absorption,   24 hr. Immersion.018%.045%D670
Water Absorption,   24 hr. Immersion + 2 hr. Boil.13%.19%D670


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.