As per our Shipping and Returns Policy, custom cuts and fabricated parts are non-returnable. If you need an over- or undersized item, note it under "Comments" during Checkout. Cut-to-size orders have an acceptable cut tolerance of 1/8" (0.125"), so clarify if the adjustment is to be made on the (+) or (-) side of the saw blade.Please review our full return and shipping policy here.
Measure Twice, Cut Once
Since custom cuts and fabricated parts are non-refundable, be very careful while measuring your dimensions. As each cut is nominal, even the slightest miscalculation could be costly.
How to Use a Measuring Tape
Extend your tape measure several inches to find the 1 and 2 inch markers. In between the inch markers you’ll find 16 equally spaced tick marks.
Measure by counting the increments beyond the nearest inch. As the increments decrease, so does the length of the mark. For example, 1/2" has a bigger mark than 1/4" which has a bigger mark than 1/8". The smallest mark follows at 1/16". Please be aware that some measuring tapes may have even smaller increments.
Features of a Measuring Tape: Sliding End Hook
The sliding end hook is designed for two different types of measurements. An outside measurement (where the hook of the tape hangs over an edge), requires the hook to slide out a bit to account for the thickness of the material. When making an inside measurement (where the hook will push up against a surface), the clip slides in, again, accounting for its thickness. The measuring tape self-adjusts to guarantee an accurate measurement (as far as the tape is concerned).
Sanitizing Acrylic and Polycarbonate Sheet [X]
Acrylic and Polycarbonate Sneeze Guards and like products require special care while cleaning and disinfecting. To maintain the optical clarity of sneeze guards and other acrylic or polycarbonate items, use an acrylic or polycarbonate safe cleaner like Novus Plastic Polish #1, Brillianize Plastic Cleaner, or a mild soap solution.
Please reference the following compatible cleaners when DISINFECTING acrylic and polycarbonate items. The use of commonly available commercial alcohol or ammonia-based disinfectants may cause crazing and damage.
Interstate Plastics is proud to carry Ultem® (PEI), an amorphous polymer that offers outstanding elevated thermal resistance, high strength and stiffness, rigidity and creep resistance. Ultem® is commonly used in the medical field due to its heat and radiation resistance, hydrolytic stability and transparency. It is used to make burn-in sockets, bobbins, printed circuit substrates, automotive lamp sockets and under-hood temperature sensors, and PEI plastics sheeting is used in aircraft interiors.
Transparency Ultem® resin widely carried in numerous transparent and opaque colors and special effects. Ultem® is also available in glass-filled grades with enhanced strength and stiffness.
Heat & Radiation Resistance Due to its amorphousness, Ultem® has no true melting point. Ultem® offers excellent stability of physical and mechanical properties at elevated temperatures due to a high glass transition temperature of 217°C. It comes available with relative thermal indices (RTI) that reach up to 180°C. Ultem® also offers inherent flame resistance without additives in most grades.
Strength & Stiffness With average stiffness and strength up to 200°C, outstanding strength and thermoplasticity make it one of the best polysulfone alternatives on the market today. Ultem® is often used in place of polysulfone in applications where superior strength, stiffness and temperature resistance are required. Unfilled, transparent grades are equal in strength to other thermoplastics with pacifying fillers.
Environmental Stress & Crack Resistance Compared to many other amorphous thermoplastics, Ultem® products retain strength and resist stress cracking when exposed to automotive and aircraft fluids, aliphatic carbonate, alcohols, acids and weak aqueous solutions. Its environmental stress and crack resistance make it an excellent plastic for any outdoor condition.
WARNING: This product can expose you to chemicals including Carbon CAS 133-86-4, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
WARNING: This product can expose you to chemicals including Bisphenol A, CAS 80-05-7, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Warning: This product may have sharp edges and points. Contact may result in injury. Handle with care.
Disclaimer: Interstate Plastics makes no representations about any of its products that are modified in any way after they leave its possession, nor do its representations apply when any of its products are improperly used or stored.
Each customer of Interstate Plastics bears full responsibility for making its own determination as to the suitability of each material, product, recommendation or advice provided by Interstate Plastics. Each customer of Interstate Plastics must identify and perform all tests and analyses necessary to assure that its finished parts incorporating materials from Interstate Plastics will be safe and suitable for use under end-use conditions.
Overall great experience working with IP. We've seen a lot of supply chain issues in other parts of our business but Interstate has been reliable.
2018-01-24
good prices and service as usual. thanks
2017-01-30
Thank you for another great order.
2016-11-14
Color can be misleading, but it's good quality PEI
2016-09-22
there was a large scratch across the length of the back of the sheet. long lead time for replacement.
2016-02-19
We were delighted with the customer service from interstate plastics. They cut our sheet down to the pieces we needed, and made it an easy process.
2014-04-07
Exceptional!
2014-02-07
The cheapest PEI I could find online. Comes packed well and customer service was kind and helpful.
2014-01-20
Our go to material for PBC substrates. Ultem offered by Interstate Plastics at a great price. We usually order online, but they have exceptional customer service as well.
3 stars based on 11 Review(s)
WARNING: This product can expose you to chemicals including Carbon CAS 133-86-4, which are known to the State of California to cause cancer. For more information go to 
WARNING: This product can expose you to chemicals including Bisphenol A, CAS 80-05-7, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to 
