Cast Elastomer

We offer a complete range of polyurethane prepolymers for the cast elastomer industry.  The chemical backbones we offer include isocyanates such as TDI and MDI, and polyol backbones such as PTMEG and PPG ethers, traditional ESTERS, and higher performance ester types such .

Each and every product is made to a strict quality standard, ensuring we offer you truly world class products.

Within each range there are numerous hardnesses available (Shore A to Shore D rating), as well as varying pot lifes (gel times and working life).

Our TDI and MDI products can be reacted with different types of curatives, some of which are listed in the separate category on the left, whereas our BINDERS and ADHESIVES are more commonly single component moisture reaction products.

If you are not sure which type of elastomer is ideal for your process, please contact us for further information.

To learn more about the different ranges of polyurethane elastomers available from Vastsky please select from the options below.

TDI / Ether

1.PPG Low Cost

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY ETL65A	65A ± 3	2.85 ± 0.2	100 – 500 cps
VASTSKY  ETL85A	85A ± 3	4.2 ± 0.2	300 – 700 cps
VASTSKY  ETL91A	90A ± 3	5.0 ± 0.2	100 – 500 cps
VASTSKY  ETL94A	95A ± 3	6.25 ± 0.2	150 – 500 cps
VASTSKY  ETL69D	70D ± 3	8.05 ± 0.2	300 – 800 cps
VASTSKY  ETL75A	75A ± 3	2.85 ± 0.15	500 – 1500 cps
VASTSKY  ETL75D	75D ± 5	11.2 ± 0.2	300 – 800 cps
VASTSKY  L-ETL85A	85A ± 3	4.2 ± 0.2	300 – 700 cps
VASTSKY  L-ETL91A	90A ± 3	5.0 ± 0.2	100 – 500 cps
VASTSKY  L-ETL94A	95A ± 3	6.25 ± 0.25	150 – 500 cps

2.PPG/PTMEG Medium Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY EMP70D	71A ± 3	8.7 ± 0.2	300 – 800 cps
VASTSKY  EMP83A	83A ± 3	3.2 ± 0.2	300 – 800 cps
VASTSKY  EMP89A	90A ± 3	4.8 ± 0.2	300 – 800 cps
VASTSKY  EMP92A	93A ± 3	5.0 ± 0.2	300 – 700 cps
VASTSKY  EMP93A	93A ± 3	5.0 ± 0.2	300 – 700 cps
VASTSKY  EMP95A	95A ± 3	6.3 ± 0.2	300 – 700 cps

3.PTMEG High Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY E77A	77A ± 3	2.4 ± 0.2	1800 – 3000 cps
VASTSKY E83A	83A ± 3	3.1 ± 0.2	1000 – 1500 cps
VASTSKY E90A	90A ± 3	4.2 ± 0.2	800 – 1300 cps
VASTSKY E93A	93A ± 3	5.0 ± 0.2	500 – 800 cps
VASTSKY E95A	95A ± 3	6.25 ± 0.25	300 – 700 cps
VASTSKY L-E60D	60D ± 3	7.4 ± 0.2	300 – 700 cps
VASTSKY L-E65D	65D ± 3	8.3 ± 0.2	300 – 700 cps
VASTSKY L-E83A	83A ± 3	3.1 ± 0.2	1000 – 1500 cps
VASTSKY L-E90A	90A ± 3	4.2 ± 0.2	800 – 1300 cps
VASTSKY L-E93A	93A ± 3	5.0 ± 0.2	500 – 900 cps
VASTSKY L-E95A	95A ± 3	6.25 ± 0.25	300 – 700 cps

4.PTMEG High Performance - Rapid Demould

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY ET83A	83A ± 3	3.1 ± 0.2	1300 – 1800 cps
VASTSKY  ET90A	90A ± 3	4.2 ± 0.2	900 – 1300 cps
VASTSKY  ET93A	93A ± 3	5.0 ± 0.2	500 – 900 cps
VASTSKY  ET95A	95A ± 3	6.25 ± 0.25	300 – 700 cps
VASTSKY  ET60D	60A ± 3	7.4 ± 0.2	300 – 700 cps
VASTSKY  ET65D	65D ± 3	8.0 ± 0.2	300 – 700 cps
VASTSKY  ET70D	73D ± 3	9.2 ± 0.2	300 – 700 cps
VASTSKY  ET75D	75D ± 3	11.2 ± 0.2	300 – 700 cps

5.PTMEG High Performance - Long Potlife

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY ETX65D	65D ± 5	8.0 ± 0.2	400 – 800 cps
VASTSKY ETX70D	70D ± 5	8.75 ± 0.25	400 – 800 cps
VASTSKY ETX764D	75D ± 5	8.75 ± 0.25	400 – 800 cps
VASTSKY ETX80D	78D ± 5	9.5 ± 0.3	400 – 800 cps
VASTSKY ETX85D	84D ± 5	12.0 ± 0.3	400 – 800 cps
VASTSKY L-ETX75D	75D ± 3	75D ± 3	500 – 700 cps
VASTSKY L-ETX80D	78D ± 3	9.5 ± 0.2	300 – 800 cps

6.PTMEG Extra High Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY EHP85A	83A ± 2	3.5 ± 0.2	900 – 1600 cps
VASTSKY  EHP90A	90A ± 3	4.6 ± 0.2	500 – 900 cps
VASTSKY  EHP93A	93A ± 3	5.2 ± 0.2	400 – 800 cps
VASTSKY  EHP95A	95A ± 3	5.8 ± 0.2	400 – 800 cps
VASTSKY  EHP60D	60D ± 3	7.50 ± 0.25	400 – 800 cps
VASTSKY  EHP70D	70D ± 3	9.00 ± 0.25	400 – 800 cps

7.PPG Cold Castable

Product	Hardness	Mix Ratio A/B	Mixed Viscosity @ 25°C
VASTSKY CCM55A	55A ± 5	100 / 56	2700 cps
VASTSKY CCM75A	73A ± 3	100 / 45	3000 cps
VASTSKY CCM80A	80A ± 3	100 / 35	4400 cps
VASTSKY CCM90A	90A ± 5	100 / 20	4900 cps
VASTSKY CCM95A	95A ± 5	100 / 15	4800 cps

8.PTMEG Cold Castable

Product	Hardness	Mix Ratio A/B	Mixed Viscosity @ 25°C
VASTSKY CC5-65	60A ± 5	100 / 100	3500 cps
VASTSKY CC50A	50A ± 3	100 / 100	3300 cps
VASTSKY CC60D	60D ± 3	100 / 16.5	4500 cps
VASTSKY CC61D	58D ± 3	100 / 18
VASTSKY CC65D	65D ± 3	100 / 18
VASTSKY CC80A	80A ± 3	100 / 45	5200 cps
VASTSKY CC90A	90A ± 5	100 / 50	4500 cps
VASTSKY CC95A	95A ± 3	100 / 15	5000 cps

9.Trowellable

Product	Hardness	Mix Ratio A/B/C	Working Life
VASTSKY 70A	70A ± 5	100 / 129.3	10 – 12 min
VASTSKY 83A	83A ± 5	100 / 60 / 2.2	20 – 25 min

10.Polyether (PTMEG) – Extra Low Free Monomer (<0.1%) TDI Prepolymers

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY XLE90A	90 ± 3	4.5 ± 0.2	400 – 700 cps
VASTSKY  XLE93A	93 ± 3	5.2 ± 0.2	250 – 550 cps
VASTSKY  XLE95A	95 ± 3	6.0 ± 0.2	300 – 600 cps
VASTSKY  XLE70D	70 ± 3	9.0 ± 0.2	400 – 700 cps
VASTSKY  XLE75D	72 ± 3	9.3 ± 0.2	200 – 500 cps

TDI / Ester

1.Caprolactone Extra High Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY ECP61A	60A ± 5	3.75 ± 0.25	1200 – 1800 cps
VASTSKY ECP72A	71 ± 3	3.30 ± 0.20	1200 – 2000 cps
VASTSKY ECP83A	83A ± 3	3.6 ± 0.2	1000 – 1600 cps
VASTSKY ECP93A	93A ± 3	5.2 ± 0.2	700 – 1100 cps
VASTSKY ECP95A	95A ± 3	5.8 ± 0.2	800 – 1200 cps
VASTSKY ECP57D	57D ± 3	7.2 ± 0.2	400 – 800 cps

2.High Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY RN3038	82A ± 5	3.2 ± 0.2	1800 – 2400 cps
VASTSKY RN3039	90A ± 5	4.3 ± 0.2	1800 – 2400 cps
VASTSKY RN3050	50D ± 5	5.1 ± 0.2	1500 – 2100 cps

3.High Performance - Long Potlife

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY RN70A	70A ± 5	2.6 ± 0.2	2100 – 2700 cps
VASTSKY  RN83A	83A ± 5	3.2 ± 0.2	1700 – 2300 cps
VASTSKY  RN90A	90A ± 5	4.6 ± 0.2	1200 – 1800 cps
VASTSKY  RN50D	50D ± 5	5.1 ± 0.2	1500 – 2100 cps
VASTSKY  L-RN50D	50D ± 5	5.1 ± 0.2	1200 – 1800 cps
VASTSKY  L-RN70A	70A ± 5	2.5 ± 0.25	1700 – 2500 cps
VASTSKY  L-RN71A	70A	2.25 – 2.75	1700 – 2500 cps

4.Polyester - Extra Low Free Monomer (<0.1%) TDI Prepolymers

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY XLS85A	85 ± 3	3.5 ± 0.2	1500 – 1700 cps
VASTSKY XLS90A	90 ± 3	3.9 ± 0.2	1300 – 1500 cps
VASTSKY XLS95A	95 ± 3	5.4 ± 0.2	900 – 1100 cps

1.PTMEG High Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY EMD85A	85A ± 3	6.50 ± 0.25	1200 – 1600 cps
VASTSKY EMD90A	90A ± 3	7.80 ± 0.25	1000 – 1800 cps
VASTSKY EMD93A	93A ± 3	8.80 ± 0.25	700 – 1500 cps
VASTSKY EMD96A	96A ± 3	9.60 ± 0.25	400 – 1200 cps
VASTSKY EMD52D	52D ± 3	10.60 ± 0.25	400 – 1200 cps

2.3 Component PTMEG

Product	Hardness	% NCO
VASTSKY EMD135 Series	60A – 95A	13.5 ± 0.2
VASTSKY EMD195 Series	85A – 75D	19.5 ± 0.2

3.3 Component PPG

Product	Hardness	% NCO
VASTSKY EML155 Series	90A – 75D	15.5 ± 0.2

4.VASTSKY CMD Series

Product	Hardness	Mix Ratio A/B	Profile @ 25°C
VASTSKY CMD78A	84A ± 3	100 / 56	8 – 12 min
VASTSKY CMD90A	90A ± 3	100 / 60	4 – 6 min
VASTSKY CMD93A	93A ± 3	100 / 42	6 – 9 min

MDI / Ester

1.Squeegy

Product	Hardness	Ratio	Part A Viscosity @ 80°C	Part B Viscosity @ 25°C
VASTSKY SQH70A	70A ± 3	100/49	500 – 1000 cps	100 – 300 cps
VASTSKY SQH75A	75A ± 3	100/28	500 – 1000 cps	100 – 300 cps
VASTSKY SQH85A	85A ± 3	100/17	500 – 1000 cps	100 – 300 cps

2.3 Component Systems

Product	Hardness	% NCO
VASTSKY EME140	55A – 95A	14.0 ± 0.2

3.2 Component Systems

Product	Hardness	% NCO
VASTSKY EME80A	80A	6.0 ± 0.2
VASTSKY EME85A	85A	6.4 ± 0.2
VASTSKY EME90A	90A	7.7 ± 0.2
VASTSKY EME95A	95A	9.0 ± 0.2

4.Caprolactone High Performance

Product	Hardness	% NCO	Viscosity @ 80°C
VASTSKY EMC85A	84A ± 3	6.0 ± 0.2	1200 – 2500 cps
VASTSKY EMC95A	95A ± 3	9.7 ± 0.2	200 – 700 cps

1.Optically Clear

Product	Hardness	Mix Ratio A/B	Part A Viscosity @ 25°C	Part B Viscosity @ 25°C
VASTSKY OC25A	25A ± 5	100 / 275	500 – 1000 cps	100 – 500 cps
VASTSKY OC35A	35A ± 5	100 / 190	500 – 1000 cps	100 – 500 cps
VASTSKY OC45A	45A ± 5	100 /110	500 – 1000 cps	100 – 500 cps
VASTSKY OC55A	55A ± 5	100 / 89	500 – 1000 cps	100 – 500 cps
VASTSKY OC60A	60A ± 5	100 / 85	500 – 1000 cps	100 – 500 cps
VASTSKY OC70A	70A ± 5	100 / 70	500 – 1000 cps	100 – 500 cps
VASTSKY OC80A	80A ± 5	100 / 80	500 – 1000 cps	100 – 500 cps
VASTSKY OC93A	93A ± 5	100 / 52	500 – 1000 cps	100 – 500 cps
VASTSKY OC80D	80D ± 5	100 / 43	500 – 1000 cps	100 – 500 cps

2.Glass Laminating Resin

Product	Hardness	% NCO	Part A Viscosity @ 25°C	Part B Viscosity @ 25°C
VASTSKY BRG65A	65A ± 5	25.2 ± 0.2	100 – 500 cps	100 – 500 cps

1.Rubber/Foam Crumb Binder

Product	% NCO	Viscosity @ 25°C
VASTSKY EMD73RB	10.3 ± 0.2	4200 – 5200 cps
VASTSKY EMD76RB	10.3 ± 0.2	2700 – 3700 cps
VASTSKY EMD288RB	8.4 ± 0.2	6700 – 7700 cps
VASTSKY EMD534URB	12.0 ± 0.2	1000 – 2000 cps

2.Moisture Cure Adhesive - 100% Solids

Product	% NCO	Viscosity @ 25°C
MCU	14.0 ± 0.2	4000 – 5000 cps

3.Moisture Cure Adhesive - Solvent based

Product	% NCO	Viscosity @ 25°C
MCA	9.0 ± 0.2	50 – 150 cps

4.Moisture Cure Adhesive Fast - Solvent based

Product	% NCO	Viscosity @ 25°C
MCAW	9.0 ± 0.2	50 – 150 cps

Curatives

All the curatives are intended for use with the VASTSKY range of “Cast Elastomers”

The cast elastomer component, known as the “Prepolymer” is reacted with the Curative, to form the solid cast elastomer.

1.Curative

Product	Short Description
MOCA	Traditional high performance aromatic diamine curative for TDI Prepolymers. Supplied as solid pellets which require melting. Used only with hot cast elastomers.
Ethacure 300	Room temperature processed, ready to use, liquid aromatic diamine curative used with TDI Prepolymers.
Isonol 93	Liquid reactive triol. Used to achieve lower hardness elastomers than is possible with MOCA or VASTSKY 300. Can also be used with MOCA or VASTSKY 300 to achieve a range or hardnesses.
VASTSKY L	Extra high performance aromatic diamine curative for TDI Prepolymers. Supplied as solid pellets which require melting. Used only with hot cast elastomers in extra high performance dynamic applications.
VASTSKY 105	Blended curative specifically used with ECP61A to achieve 63 Shore A and excellent abrasion resistance.
VASTSKY 110	TBlended curative that can be used with all TDI prepolymers to give exceptional abrasion resistance where applications involve high wear.
VASTSKY 210	Blended curative based on 1,4 Butanediol designed to extend the potlife of MDI prepolymers for hand casting while maintaining physical properties.
AH41	A range of blended liquid curatives used in machine processing to speed up potlife and thus demould time for high output production.
AH45	A range of blended liquid curatives used in machine processing to speed up potlife and thus demould time for high output production.