Fire Retardant Epoxies

The epoxy systems in this group are highly engineered products designed to meet or exceed the requirements of the various flame retardant specifications for which they were developed. They are filled laminating compounds that have good handling characteristics and provide very high physical properties in addition to their excellent fire retardant capabilities. They are well suited to a wide variety of production and tooling applications where the combination of very good physical properties and outstanding flame retardant abilities will provide durable parts and tools.

Click on the product number below for more information:
PT2475	PT5355	PT5358

Product Description

PT2475
PT2475 is a filled, off-white epoxy laminating system designed for use in constructing fire retardant laminates for parts or reinforcements. PT2475 meets the requirements of the FAR 25.853 Specification. This system has a 1 hour pot life at normal ambient temperatures, which will allow the construction of larger laminated than would be possible with a faster material. The system cures well at room temperature, and the cure can be accelerated with the addition of mild heat if desired.

PT5355
PT5355 is an epoxy laminating system with cured fire retardant characteristics that meets the requirements of the FAR 25.853 specification. Independent lab tests show that this material significantly exceeds the minimum requirements of this specification. It has well-balanced handling characteristics for ease of use and quick fabrication capabilities. There are two hardeners available for use with PT5355 resin for different size laminates. PT5355 Part B has a 30 minute pot life, and is intended for smaller items and patching applications. PT5355 Part B1 has a 1 hour pot life, and is intended for larger laminates. Both hardeners will cure completely at room temperature and provide very similar properties when cured.

PT5358
PT5358 is an epoxy laminating system with cured fire retardant characteristics that meets the requirements of the UL 94 V-0 specification. The cured physical properties of PT5358 are quite good, and laminates made with it will give long service in the most demanding applications. It has well-balanced handling characteristics for ease of use and quick fabrication capabilities.

	PT2475 A/B	PT5355 A/B or B1	PT5358 A/B
Color	Off-White	White	White
Mix Ratio, By Weight	100 : 13	100 : 19	100 : 14
Mixed Viscosity, cps	2,100 - 2,300 cps	900 - 1,000 cps	4,000 - 5,000 cps
Pot Life, @ 77°F	60 - 65 min	Part B - 30 min. Part B1 - 1 hour	40 min.
Cured Hardness, Shore D	87 Shore D	88 Shore D	85 Shore D
Specific Gravity, gms./cc	1.23	1.19	1.24
Tensile Strength, psi	26,492 psi	45,775 psi	45,775 psi
Elongation @ Break, %	1.57 %	1.50 %	1.50 %
Tensile modulus, psi	2,353,522 psi	2,754,557 psi	2,754,557 psi
Flexural Strength, psi	59,980 psi	59,437 psi	59,437 psi
Flexural Modulus, psi	2,501,855 psi	2,894,587 psi	2,894,587 psi
Compressive Strength, psi	13,626 psi	11,265 psi	13,245 psi
Compressive Modulus, psi	526,053 psi	455,294 psi	525,458 psi
GO TO BULLETIN	PT2475	PT5355	PT5358

PT2475 A/B

PT5355 A/B or B1

PT5358 A/B

Color

Off-White

White

Mix Ratio, By Weight

100 : 13

100 : 19

100 : 14

Mixed Viscosity, cps

2,100 - 2,300 cps

900 - 1,000 cps

4,000 - 5,000 cps

Pot Life, @ 77°F

60 - 65 min

Part B - 30 min.
Part B1 - 1 hour

40 min.

Cured Hardness, Shore D

87 Shore D

88 Shore D

85 Shore D

Specific Gravity, gms./cc

1.23

1.19

1.24

Tensile Strength, psi

26,492 psi

45,775 psi

Elongation @ Break, %

1.57 %

1.50 %

Tensile modulus, psi

2,353,522 psi

2,754,557 psi

Flexural Strength, psi

59,980 psi

59,437 psi

Flexural Modulus, psi

2,501,855 psi

2,894,587 psi

Compressive Strength, psi

13,626 psi

11,265 psi

13,245 psi

Compressive Modulus, psi

526,053 psi

455,294 psi

525,458 psi

GO TO BULLETIN

PT2475

PT5355

PT5358

562-946-4511
800-421-1518

800-421-1518

Fire Retardant Epoxies

Product Description