The chart below provides what we have found to be the most critical selection performance criteria for our standard Addition Cure (P-Series) silicones.  This data will assist you in identifying the product(s) that will perform best in your application.  For full technical specifications on any of the compounds, please click on the product number in the left column or select from the cascading menu under Technical Specification Sheets from the navigation bar.  In either case, you can access single-page PDF data sheets (printable) with comprehensive information on each product.

Prod. #	Shore A Hardness  (+/- 4) 1 Day 3 Days		Tear Resistance (ppi) ASTM D624, Die B	Tensile Strength (psi) ASTM D412	Elongation (%) ASTM D412	Mixed  Viscosity (CPS)
General Info	Basic data sheet for all P-Series silicone products (1-page)
P-157	Gel	Gel	Gel	Gel	Gel	5,000
P-125	40	40	90 +/- 15	700 +/- 50	250 +/- 50	90,000 to 110,000
P-100	30	33	70 +/- 10	470 +/- 30	345 +/- 25	25,000 to 40,000
P-90	32	35	125 +/- 10	600 +/- 50	415 +/- 30	40,000 to 55,000
P-70	58	60	70 +/- 10	775 +/- 50	150 +/- 25	90,000 to 110,000
P-60	58	62	75 +/- 10	900 +/- 90	200 +/- 25	95,000 to 120,000
P-50	52	54	70 +/- 10	750 +/- 50	200 +/- 25	70,000 to 90,000
P-45	44	45	160 +/- 15	800 +/- 50	275 +/- 25	40,000 to 55,000
P-44	42	42	120 +/- 20	600 +/- 50	250 +/- 25	50,000 to 60,000
P-20	21	22	120 +/- 20	525 +/- 50	425 +/- 40	20,000 to 35,000
P-171	48	50	27 +/- 3	495 +/- 30	150 +/- 20	1:1 20,000 to 25,000 10:1 15,000 to 25,000
P-15	17	18	100 +/- 20	475 +/- 30	460 +/- 30	15,000 to 30,000
P-4	38	41	11 +/- 2	700 +/- 50	150 +/- 20	3,500 to 7,000

Notes:
1) P-17 is offered in a 1:1 and a 10:1 mix ratio

All P-Series products have a 6-month shelf life. 
All P-Series products have a cure time of 16 to 24 hours 

The information contained in this selection guide is, to our best knowledge, true and accurate, but all recommendations or suggestions are made without guarantee.  Since the conditions of use are beyond our control, Silicones, Inc. disclaims any liability incurred in connection with the use of our products and information contained herein.