Salt Lake City, UT
1. EnviroTech Molded Products, Inc.
Address: 2830 West Directors Row, Salt Lake City, UT 84104
Phone: (801) 972-6880
Website: https://empslc.com/
Founded: 1970s (50+ years in operation)
Services:
Custom injection molding, bulk injection molding, industrial molding solutions, design consultation, mold engineering, CNC machining, metal-to-plastic conversion
Industries Served:
Energy, oil and gas, semiconductors, mining, wastewater management, defense, filtration, food processing
Highlight:
Industry leader with over 50 years of experience specializing in complex, thick, heavy injection molded parts that other manufacturers cannot produce. EnviroTech’s capabilities include shot sizes up to 580 pounds and wall thicknesses exceeding 5 inches, positioning them as the benchmark for large industrial molding applications. They specialize in metal-to-plastic conversion, helping clients reduce costs and lead times while increasing durability. Their expertise spans custom filter plates (chamber, mineral, membrane, flush plates), fluid and chemical pumps, and large fusion pipe fittings for industrial applications.
2. SMI Molding, Inc.
Address: 1800 South 1100 West, Clearfield, UT 84015
Phone: (801) 773-0969
Website: https://smimolding.com/
Founded: 1981
Facility: 60,000 square feet, 30+ injection molding machines
Services:
Standard plastic injection molding, gas-assist molding, over-molding, plastic engineering, tooling design and fabrication
Industries Served:
Medical, consumer products, industrial, electronics, automotive
Certifications: ISO 9001:2015
Highlight:
Established in 1981 with just four machines, SMI Molding has grown to operate over 30 injection molding machines from a 60,000 square foot facility in Clearfield (approximately 30 miles north of Salt Lake City). Their capabilities extend beyond standard injection molding to include gas-assist molding and over-molding techniques for complex applications. ISO 9001:2015 certification ensures rigorous quality standards throughout their manufacturing processes. SMI’s focus on plastic engineering and tooling enhances their service offerings for customers seeking precision and quality.
3. Aspen Earth
Address: Salt Lake City, UT
Phone: (801) 263-1819
Website: https://www.aspenearth.com/
Services:
Injection molding, mold tooling design and fabrication, CNC machining, 3D scanning and reverse engineering, product development, consulting services, sustainable material options
Industries Served:
Construction, outdoor recreation, tactical/military, industrial, consumer products
Highlight:
Vertically integrated injection mold and tooling shop with over 20 years of combined experience in plastic parts manufacturing. Aspen Earth provides complete product development services from initial concept through production, including 3D scanning for reverse engineering existing products. Their sustainable material options emphasize environmental responsibility without compromising performance. The company has built strong client relationships spanning nearly a decade, producing parts for warehouse management systems, tactical gear components, and construction accessories including sprinklers and plastic rebar.
4. Rider Plastics Inc.
Address: 2185 South 3600 West, West Valley City, UT 84119
Phone: (801) 972-2823
Website: https://riderplastics.com/
Founded: 1948
Services:
Custom injection molding, mold design (AutoCAD), prototype development, production molding
Industries Served:
General manufacturing, industrial, consumer products
Highlight:
One of the oldest injection molding companies in the Mountain West region, Rider Plastics has been a trusted source for injection molding since 1948. Their complete in-house process covers design (using AutoCAD software), material selection, mold cutting and polishing, assembly with water cooling lines, and production molding. With over 75 years of experience, Rider Plastics offers prototype development for testing before committing to full production runs. Their longevity in the Utah market demonstrates sustained demand for domestic plastic manufacturing capabilities.
5. Technology Design
Address: Orem, UT (Utah Valley, serving Salt Lake City metro)
Phone: (801) 221-9600
Website: https://technology-design.net/
Services:
Custom injection molding, product development coaching, manufacturing optimization, prototyping
Industries Served:
Consumer products, industrial, startups and small businesses
Highlight:
Self-described as Utah’s number one injection molding company, Technology Design differentiates through their consulting approach, coaching clients from initial concept through large-scale manufacturing at no additional charge. Their competitive advantages over offshore manufacturing include 5-day average lead times (versus 60 days from China), no minimum quantity requirements, and net-30 payment terms. Technology Design serves the entire Wasatch Front from Ogden through Provo, specializing in helping smaller businesses avoid costly manufacturing pitfalls while maintaining internationally competitive pricing.
6. Ramtec Company
Address: 1434 South Pioneer Road, Salt Lake City, UT 84104
Phone: (801) 972-5500
Website: https://ramtecco.net/
Founded: 1990s (30+ years in operation)
Services:
Prototype mold making (aluminum, steel, MUD molds), Master Unit Die inserts, injection mold manufacturing, CNC machining
Industries Served:
Product development, prototyping, industrial, consumer products
Highlight:
Prototype mold making specialists with over 30 years of mold manufacturing expertise. Ramtec excels in Master Unit Die (MUD) molds, which lower total costs and turnaround time for prototype revisions by allowing inserts to be easily removed, redesigned, and re-inserted while keeping the larger tool in the injection mold machine. Their equipment enables simultaneous operations to minimize turnaround time for rapid prototyping needs. Ramtec serves customers requiring aluminum and steel prototype molds for testing before committing to production tooling.
Notes
Utah’s plastic injection molding industry clusters primarily along the Wasatch Front corridor from Ogden through Salt Lake City to Provo. The state’s business-friendly environment, growing technology sector, and expanding manufacturing base have attracted both established injection molders and entrepreneurial ventures.
EnviroTech Molded Products stands out for their specialty in extremely large industrial molded parts (shot sizes to 580 lbs), capabilities that few injection molders nationwide can match. This positions Utah as a destination for heavy industrial molding applications in energy, mining, and wastewater sectors.
The presence of companies like Technology Design, which emphasizes reshoring advantages over Chinese manufacturing, reflects broader industry trends toward domestic production. Utah’s central geographic location provides logistics advantages for serving both West Coast and Midwest markets.
Several Utah companies emphasize sustainable manufacturing practices, with Aspen Earth offering green material alternatives. This aligns with growing customer demand for environmentally responsible plastic manufacturing options.
Research conducted January 2026. Verify all information directly with companies before business engagement.