LSR vs HCR / HTV: choosing a silicone molding route
LSR and HCR describe silicone material forms. HCR is also called HTV; compression, transfer and injection describe processing routes, not separate material grades.
Keep material and process terms distinct
LSR is a liquid silicone system commonly used in injection molding. HCR / HTV is a high-consistency gum that can be processed by compression, transfer, injection or extrusion, depending on the grade and equipment. HCR can use platinum or peroxide cure.
Compare a complete part specification
Review geometry, critical dimensions, flash allowance, compound, required documentation and planned volumes. Automation, tooling investment and finishing needs can change the comparison. There is no universal volume threshold, cycle time or cost ratio that selects the right route for every part.
Ask for comparable quotations
Give each manufacturer the same drawing, material and inspection requirements. Separate tooling, sampling, post-curing, testing and production. Request the proposed process and the basis for critical tolerances instead of assuming an LSR label guarantees a fixed tolerance.
Before requesting a quote
Send the drawing revision, application, material preference, critical dimensions, annual quantity, delivery market and required evidence. Feasibility, testing, price and timing need written project review.
Buyer questions
Is HCR different from HTV?
The terms commonly describe the same high-consistency, heat-vulcanizing silicone family. Specify the actual compound, cure system and molding process to avoid ambiguity.