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BC Flex-Kast Clear Series
Flex-Kast Clear is a two-component water clear UV resistant urethane elastomer compound designed for general purpose molding and casting of various shapes where optimum clarity is desired. This product is easy-to-handle, room temperature mixing and curing system that contains no TDI, MDA or MOCA. Flex-Kast Clear may also be used in potting and encapsulating applications.
Product Features:
Physical Properties
Durometer (+/- 3pts.) 55 A 75 A 95 A 70 D
Tensile (psi) 480 780 2180 5380
Tear (pli) 59 84 210 1020
Elongation 230% 260% 260% 80%
BC8990 Urethane Elastomer
BC8990 is a two-component urethane elastomer compound specifically designed for general purpose molding and casting of various shapes. This product is a safe, easy-to-handle, room-temperature mixing and curing system that contains no TDI, MDA or MOCA. BC8990 may be used to provide abrasion-resistant liners, pads, and bumpers. The low shrinkage, low viscosity, superior toughness, and excellent detail reproduction makes this system ideal for general purpose castings and quality tooling operations. It may also be used in potting and encapsulating applications.
Product Features:
Mix ratio: 4:1 by wt.
Pot life: 25 minutes
Viscosity (Mixed): 3,600 cps
Demold time: 16–24 hours
Hardness (shore): 82–85A
Color: Amber
BX-31 30 Shore A Elastomer For Concrete Casting
BX-31 is a two-part polyurethane molding system. BX-31 is mixed 100iso:97curative by weight (or 1 Pt-A Iso to 1 Pt-B Curative by volume) and cures at room temperature. BX-31 cures to a low hardness, Shore A 31 light yellow rubber. Ultimate properties are obtained after 3-4 days of room temperature cure. Cure can be accelerated with heat (130-150°F for 12-16 hours) but a slightly harder polymer (34 +/- 2 Shore A) and slight shrinkage will be obtained.
Product Features:
Preliminary Physical Properties
Split tear, pli (ASTM D470) 20 +/- 4
Die C Tear, pli (ASTM D624-C) 70 minimum
Tensile, psi (ASTM D412) 300 minimum
Elongation, % (ASTM D412) >1000
Final Hardness, Shore A 31 +/- 2
Viscosity, Iso Side A, cPs 1000
Viscosity, Curative Side B, cPs 350
Gel Time, minutes 30 +/- 5
BX-41 40 Shore A Elastomer For Concrete Casting
BX-41 is a two-part polyurethane molding system. BX-41 is mixed 100:97 by weight (or 1 Part-A Iso to 1 Part-B Curative by volume) and cures at room temperature. BX-41 cures to a medium hardness, Shore A 41 lavenderrubber. Ultimate properties are obtained after 3-4 days of room temperature cure. Cure can be accelerated with heat (130-150°F for 12-16 hours) but a slightly harder polymer (43 +/- 2 Shore A) and slight shrinkage will be obtained.
Product Features:
Preliminary Physical Properties
Split tear, pli (ASTM D470) 23
Die C Tear, pli (ASTM D624-C) 110
Tensile, psi (ASTM D412) 700
Elongation, % (ASTM D412) 850
Final Hardness, Shore A 41 +/- 2
Viscosity, Curative Side B, cPs 350
Viscosity, Iso Side A, cPs 1000
Pot Life, minutes 20-30
BX-51 50 Shore A Elastomer For Concrete Casting
BX-51 is a two-part polyurethane molding system. BX-51 is mixed 100:97 by weight (or 1 Part-A Iso to 1 Part-B Curative by volume) and cures at room temperature. BX-51 cures to a high hardness, Shore A 50 2, gray rubber. Ultimate properties are obtained after 3-4 days of room temperature cure. Cure can be accelerated with heat (130-150°F for 12-16 hours) but a slightly harder polymer (53 +/- 2 Shore A) and slight shrinkage will be obtained.
Product Features:
Preliminary Physical Properties
Split tear, pli (ASTM D470) 23
Die C Tear, pli (ASTM D624-C) 11
Tensile, psi (ASTM D412) 750
Elongation, % (ASTM D412) 650
Final Hardness, Shore A 50 +/- 2
Viscosity, Curative Side B, cPs 350
Viscosity, Iso Side A, cPs 1000
Pot Life, minutes 15-20
BC8880 Polyurethane Elastomer Surface Coat
BC8880 is a two-part urethane gel coat that has excellent handling characteristics, very low moisture sensitivity, a high modulus, and a high hardness. It is a brushable room-temperature curing urethane that has many general purpose applications such as foundry patterns, cure box liners, and abrasion-resistant pads and bumpers. It may also be used as a urethane adhesive.
Product Features:
Mix ratio: 100:60 by wt.
Pot life: 12–15 minutes
Viscosity (Mixed): Thixotropic
Demold time: 8–12 hours
Hardness (shore): 60D +3
Color: Available in Amber, Black and Red
BC8860 Urethane Elastomer
BC8860 is a low-viscosity, two-component urethane casting compound that is specifically formulated for high resistance to abrasion and impact. It is recommended for use in the production casting of highly wear-resistant parts and linings. BC8860 is a safe, easy-to-handle, room-temperature mixing and curing system that does not contain TDI, MDI, or MOCA. Relatively insensitive to typical environmental moisture, BC8860 will make good void-free parts without the problems that sometimes result from other conventional urethane systems.
Product Features:
Mix ratio: 100:60 by wt.
Pot life: 18 minutes
Viscosity (Mixed): 1,400–1,500 cps
Demold time: 6–8 hours
Hardness (shore): 62D +2
Color: Available in Light Amber, Black and Red
BC8870 Urethane Elastomer
BC8870 is a low-viscosity, two-component urethane casting compound that is specifically formulated for high resistance to abrasion and impact. It is recommended for use in the production casting of highly wear-resistant parts and linings. BC8870 is a safe, easy-to-handle, room-temperature mixing and curing system that does not contain TDI, MDI, or MOCA. Relatively insensitive to typical environmental moisture, BC8870 will make good void-free parts without the problems that sometimes result from other conventional urethane systems.
Product Features:
Mix ratio: 100:60 by wt.
Pot life: 13 minutes
Viscosity (Mixed): 1,800–2,000 cps
Demold time: 2–3 hours
Hardness (shore): 70D +2
Color: Available in Light Amber, Black and Red
BC8675E Urethane Elastomer
BC8675E is a multi-purpose easy-to-use elastomer that cures at room temperature and resists moisture absorption. It works well for molds for casting of concrete and plaster, and it does not contain MOCA, MDA, TDI or MDI. BC8675E is used for mold fabrication, for shock absorbent pads and liners, as an adhesive for strong and resilient bonds, electrical potting and cable sealing applications, and for making various types of urethane rubber parts.
Product Features:
Mix ratio: 100:45 by wt.
Pot life: 25 minutes
Viscosity (Mixed): 3,000 cps
Demold time: 8–14 hours
Hardness (shore): 75A +2
Color: Amber
BC8660E Urethane Elastomer
BC8660E is a multi-purpose elastomer that can perform many functions. Special product characteristics include: excellent for molds for casting of concrete and plaster, resists moisture absorption, does not contain MOCA, MDA, TDI or MDI, is very easy to use, and cures at room temperature.
Product Features:
Mix ratio: 100:55 by wt.
Pot life: 25 minutes
Viscosity (Mixed): 2,500 cps
Demold time: 8–14 hours @ room temp; 4 hours or less at higher temps
Hardness (shore): 60A +/-2
Color: Amber
BC8640E Urethane Elastomer
BC8640E is an easy-to-use polyurethane elastomer that is suitable for many applications. Special product characteristics include room temperature mixing and curing, as well as excellent hydrolytic stability. Durable products are easily produced with BC8640E, which does not contain MOCA, MDA or MDI.
Product Features:
Mix ratio: 90:100 by wt.
Pot life: 45 minutes
Viscosity (Mixed): 850 cps
Demold time: 12–16 hours
Hardness (shore): 40A +2
Color: Amber
Urethane Elastomers
BC 8321 Three Component Variable Durometer 10-20 Shore A
BC8321 is used to make soft molds of detailed masters that contain deep undercuts. Some of the most common uses are concrete formliners and to make molds for point-of-purchase displays, rapid prototypes, special effects, taxidermy, and sculpture reproductions.BC8321 Softener Part C can be used to reduce the hardness below 10A.
Product Features:
The following table lists the general properties of BC8321 after it has cured.
Properly Cured Product
Part A + Part B Standard mix + 50 pbw Part C *
Color Dark Purple Dark Purple
Elongation, % >1000 >1000
Shore Hardness ~A19 ~A14
Tear, Die C, PLI 70 60
Tear, Split, PLI 14 14
Ultimate Tensile, PSI 260 150
*100 parts Part A, 98 parts Part B and 50 parts Part C.