Liquid Silcone Rubber (LSR)

LSR Tooling & Molding from P2P

LSR Prototype Tooling

NPI/Medical is proud to be a nationally recognized leader in the craft liquid silicone rubber; both in prototype and production! We have a 10-year history of tooling and processing LSR’s starting with replacing optical plastic LED lenses. NPI/Medical’s broad experience in medical, healthcare, consumer and industrial applications offer solutions for quick turnaround, cost effective, low volume prototype molds and parts; in addition to established sources for high quality, flash free high-volume molds and automation.


Our facility provides:

The feed pumps are pumps are 1:1 and 2:1 ratio capable; employ a manual system of any ratio and all have third stream color additives of up to 30%. All are prototype injection molding capable with heated LSR master frames and a custom manual mix/feeding system for all LSR’s. Additionally, our LSR Molding is Grade 8 cleanroom compatible.

History of LSR

LSR’s developed in early 1970’s, and in the late 1970’s a “pumpable” silicone rubber was developed and available to fabricators.

Medical LSR

Health Care LSR

High End LSR

Optical LSR

Prototype & Production LSR



Key Terms

5 Silicone Families
1. RTV’s (Room Temperature Vulcanizing)
2. Silanes and Coatings
3. Silicone Fluids
4. Silicone Sealants
5. Silicone Elastomers (LSR/LIM)

Advantages of LSR

Download the LSR Whitepaper


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