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Buy American‑Made Laboratory Products with Confidence

MIDSCI™ is your trusted source for American‑made lab supplies that help support compliance with the Federal Buy American Act and related federal purchasing requirements.

As a family‑owned U.S. laboratory supplier since 1983, we proudly partner with domestic manufacturers to provide high‑quality lab supplies, chemicals, equipment, and instruments made right here in the United States. With a Midwest‑based warehouse and representatives across the country, we deliver reliable products backed by real people and real support.

From everyday lab consumables and reagents to equipment and precision instruments, MIDSCI™ helps labs run efficiently, stay compliant, and support U.S. manufacturing. Whether you’re purchasing for a government facility, federally funded research program, or private lab that values domestic sourcing, MIDSCI™ makes it easy to buy American without sacrificing quality or service.

Contact us for assistance with Buy American–compliant sourcing, documentation, and product recommendations.

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DuraSeal™ Sealing Film

  • Durable, heat-resistant, solvent-proof laboratory sealing film
  • Chemically resistant
  • Heat resistant & Microwave compatible
  • Tight sealing
  • Tear resistant
DuraSeal’s™ superior heat-resistant feature allows for containers to be incubated in boiling water baths without suffering the characteristic melting of paraffin-based alternatives. DuraSeal™ is polyethylene based and free of any adhesives.

DuraSeal™ is easy to use. There is no inter-leaf paper to strip away, just stretch the film symmetrically over a container opening and the 1.5 mil thick film contracts inwardly around the opening or neck of the container to provide a drum-tight, water-proof seal. The film can be elongated 500-800% before breakage. The film clings to itself, especially after stretching so the free edges of the film may be stretched around the container to secure the container edges.

Permeability Information

  • Oxygen = 125cc/100in2/24hrs at 23°C
  • Carbon Dioxide = 1300cc/100in2/24hrs at 23°C
  • Water Vapor = 1.0g/100in2/24hrs at 38°C and 90% R.H.

Proudly made in the USA! Click here for more made in America products!

Item#:
ASSEAL2


ContainerSeal™ Sealing Tape

 

ContainerSeal™ is a sealing tape designed for the vast range of bottles and containers used in laboratory applications. Its unique elastomeric characteristics allow it to stretch and conform around the irregular perimeters of containers lids and covers to form a tight seal. ContainerSeal™ will block water vapor loss, reduce the rate of gas exchange and prevent the entry of contaminants and can be easily removed from most surfaces without leaving adhesive residue.

Proudly made in the USA! Click here for more made in America products!

  

Item#:
ASSEAL1


Titer Tops® Sealing Film

 

Reliable, pierceable microplate sealing for contamination control.

 

Titer Tops® Sealing Film provides a dependable way to seal microplates and protect samples from cross-well contamination, evaporation, and spills. These pre-cut, pierceable polyethylene films feature a strong, non-cytotoxic acrylic adhesive that is waterproof, solvent-resistant, and sterile, making them ideal for microbiology, ELISA work, PCR prep, screening assays, and general plate handling. Each 4.4 mil thick film is durable enough to stay firmly in place yet easily pierced with a pipette tip for effortless sample access.

 

Designed for convenience and accuracy, Titer Tops® include two scored end tabs that simplify film alignment and removal, even when wearing gloves. The film remains secure under demanding lab conditions, with stable performance in 100% humidity and temperatures ranging from - 40°C to 100°C. With excellent chemical resistance, thermal stability, and a writable surface for clear labeling, Titer Tops® Sealing Film ensures dependable, contamination-free microplate workflows.

 

*Not recommended for thermal cyclers.
 

Proudly made in the USA! Click here for more made in America products! 

Item#:
ASTITERTOPSF


Hoefer® Chroma Deluxe Dual Cool Vertical Protein Electrophoresis System

 

Ergonomic design offers easier handling and sample introduction.

  • Maximum glass plate size 18 x 16 cm
  • Gels are fully submerged for greater temperature equilibration
  • Produces straight lanes and sharp, well-defined bands
  • Run up to four gels (maximum 112 samples) at one time under identical conditions
  • Accommodates denaturing and native polyacrylamide gels, and the second dimension of 2-D electrophoresis
  • Run gels at uniform temperature from 1 to 45°C
  • A wide array of accessories enables you to tailor gel configurations to your needs 

Hoefer® Chroma Deluxe Complete Unit (SE600X-15-15)

  • Lower Buffer Chamber, 1/ea
  • Upper Buffer Chamber, 1/ea
  • Safety Lid w/High Voltage Leads, 1/ea
  • Heat Exchanger, 1/ea
  • Glass Plates 18 x 16 cm, 6/pk
  • Clamp Assemblies, 16 cm, 4/pk
  • Cams, 6/pk
  • Slotted Gaskets for Upper Buffer Chamber, 2/pk
  • Dual Gel Casting Stand with Leveling Base, 1/ea
  • Bubble Level, 1/ea
  • Laminated Gaskets for Caster, 2/pk
  • Buffer Dam, 1/ea
  • Spacer-Mate Alignment Template, 1/ea
  • Wonder Wedge Plate Separation Tool, 1/ea
  • Gel Seal, 1/ea
  • Combs, 15-well, 1.5 mm thick, 2/pk
  • Spacers, 1.5 mm thick, 2 cm wide, 4pk

Hoefer® Chroma Deluxe Basic Unit (SE600X)

The same as above without the combs and spacers. Order two SE511 combs and two sets of 16 cm long spacers separately.

Proudly made in the USA! Click here for more made in America products!

Item#:
ASHOFRSE600XES

FilmStrips™

For Sealing Only One 8-well Row of a 96-well Plate.

Designed for use with either 1×8 strip-well ELISA plates or standard 96-well plates where rows must be selectively protected or accessed. Ideal for COVID-19 testing to seal a row of 8 wells after swabs are deposited into a deep-well plate.
  • Certified DNase- & RNase- free
  • A pliable polypropylene film minimizes aerosols upon removal
  • Each sheet contains 8 strips on a continuous liner for ease of use
  • Apply individually or two-at-a-time
  • Use as a secondary film to seal previously pierced wells or to prevent accidental pipetting
Applications
  • General laboratory use
  • Incubation
  • ELISA
Temp. Range
  • -40°C to +120°C

Proudly made in the USA! Click here for more made in America products!

Item#:
AS1X8FILMSTRIPS

Plate-Sealing Roller

Application: Plate-sealing

Material: Rubber, metal

The plate-sealing roller features a smooth spinning, thermoplastic elastomer sealing surface with a durable plated metal handle.

  • Reusable, autoclavable
  • Provides a large 4 inch (10.16 cm) wide sealing surface
  • A 10 minute or greater dwell me at room temperature before processing increases the film-to-plate bond

Proudly made in the USA! Click here for more made in America products!

Item#:
ASROLLERSEALPT
 
Plate-Sealing Roller Features
SpecsPlate-Sealing Roller

AbsorbMax™ Black Vinyl Sealing Film

AbsorbMax™ is a black vinyl sealing film for black microplaes that can be applied to either the top or bottom of the plate.

  • Minimizes background fluorescence and cross talk between plate wells
  • Ideal as a back seal for black plates with clear well bottoms for top reading measurements
  • Absorbs stray light, reducing the background caused by light scatter
  • Protects light sensitive samples from degradation
  • Features a single split liner for easy application

Applications

  • Fluorescence assays
  • Light sensitive sample protection

Temp. Range

  • -40°C to +80°C

Proudly made in the USA! Click here for more made in America products!

Item#:
ASABSORBMAX
 
AbsorbMax Features
Specs AbsorbMax
Sealing film selection guide by application
Sealing film selection guide by attributes

Film-Sealing Paddles

Paddles
  • Sealing paddles complete the application of sealing films
  • Press the film with the sealing paddle to assure a secure uniform seal around all wells of a microplate
  • Paddles fit within the edge of raised-rim plates 
Plate Roller
  • Sealing Roller completes the application of sealing films
  • Press the film with the accessory plate roller assure a secure uniform seal around all wells of a microplate

Proudly made in the USA! Click here for more made in America products!

Item#:
ASFILMSEALPADDLE

BrightMax™ Sealing Film

White, light-reflecting, vinyl sealing film designed for use with white microplates.

  • The light reflective properties on clear-bottom plates maximize the sensitivity of bioluminescence and chemiluminescence assays in bottom-reading luminometers
  • Maximizes intensity and signal-to-noise ratios in luminescence assays
  • May be used as a backing matrix for microscopy of punch-out samples for filter plates (e.g. ELISPOT assays)
  • Features a single split liner for easy application

Applications

  • Luminescence
  • Fluorescence
  • Microscopy
Temp. Range
  • -40°C to +80°C

Proudly made in the USA! Click here for more made in America products!

Item#:
ASFLOULUMIN
 
BrightMax Features
Specs BrightMax
Sealing film selection guide by application
Sealing film selection guide by attributes


Hoefer® Tall Standard Dual Cool Vertical Protein Electrophoresis System

 

Taller vertical format accommodates 24 cm long gels for increased resolution.

  • Maximum glass plate size 18 x 24 cm
  • Produce straight lanes and sharp, well-defined bands
  • Run up to four gels (maximum 112 samples) at one time under identical conditions
  • Run gels at uniform temperature from 1 to 45°C
  • Accommodates denaturing and native polyacrylamide gels and 2-D electrophoresis
  • A wide array of accessories allows you to tailor gel configurations to your needs  

Hoefer® Tall Standard Complete Unit (SE660-15-15)

  • Lower Buffer Chamber, 1/ea
  • Upper Buffer Chamber, 1/ea
  • Safety Lid w/High Voltage Leads, 1/ea
  • Heat Exchanger, 1/ea
  • Glass Plates 18 x 24 cm, 6/pk
  • Clamp Assemblies, 8 cm, 4/pk
  • Clamp Assemblies, 16 cm, 4/pk
  • Cams, 6/pk
  • Slotted Gaskets for Upper Buffer Chamber, 2/pk
  • Dual Gel Casting Stand with Leveling Base, 1/ea
  • Bubble Level, 1/ea
  • Laminated Gaskets for Caster, 2/pk
  • Buffer Dam, 1/ea
  • Spacer-Mate-Alignment Template, 1/ea
  • Wonder Wedge™-Plate Separation Tool, 1/ea
  • Gel Seal, 1/ea
  • Combs, 15-well, 1.5 mm thick, 2/pk
  • Spacers, 1.5 mm thick (2 cm wide), 4/pk
  • Lower Buffer Chamber, 1/ea 

Hoefer® Tall Standard Basic Unit (SE660)


The same as above without the combs and spacers. Order two SE511 combs and two sets of 24 cm long spacers separately.

 

Proudly made in the USA! Click here for more made in America products!

Item#:
ASHOFRSE660ES

Multi-Swipe™ Plate-Sealing Paddles

For sealing flat-top and raised-rim plates.

Application: Plate-sealing

Material: Polyethylene

The Multi-Swipe plate-sealing paddle ensures a secure and uniform, pressure-sensitive seal around all wells and is an economical alternative to plate rollers. Plate-sealing paddles are designed for use with all plate types.

  • Reusable, recyclable
  • The semi-soft, pliable sealing surfaces prevent the film/foil from being torn or ripped
  • The non-flat contoured side is designed to go down to the plate; the center raised textured surface provides a non-slip finger hold
  • Features two sealing surfaces: the shorter length fits inside the walls of raised-rim plates; the longer length is ideal for flat-top and deep-well plates
  • Features two unique sized corner radii: 1/8 inch (0.3175 centimeter) and 1/16 inch (0.1588 centimeter) to seal around the plate perimeter; the tighter radii is for use with raised-rim PCR plates

Helpful Tips

  • The printed side is used to seal the film to the plate
  • Multiple swipes of the sealing paddle in both directions is highly recommended
  • A 10 minute or greater dwell time at room temperature before processing increases the film-to-plate bond

Proudly made in the USA! Click here for more made in America products!

Item#:
ASFILMSEALPAD
 
Specs Plate-Sealing Paddles


Hoefer® Standard Dual Cooled Vertical Protein Electrophoresis System

 

Standard vertical format for 18 cm long gels.

  • Maximum glass plate size 18 x 16 cm
  • Produce straight lanes and sharp, well-defined bands
  • Run up to four gels (maximum 112 samples) at one time under identical conditions
  • Run gels at uniform temperature from 1 to 45°C
  • Accommodates denaturing and native polyacrylamide gels and 2-D electrophoresis
  • A wide array of accessories allows you to tailor gel configurations to your needs 

Hoefer® Standard Complete Unit (SE600-15-15)

  • Lower Buffer Chamber, 1/ea
  • Upper Buffer Chamber, 1/ea
  • Safety Lid w/High Voltage Leads, 1/ea
  • Heat Exchanger, 1/ea
  • Glass Plates 18 x 16 cm, 6/pk
  • Clamp Assemblies, 16 cm, 4/pk
  • Cams, 6/pk
  • Slotted Gaskets for Upper Buffer Chamber, 2/pk
  • Dual Gel Casting Stand with Leveling Base, 1/ea
  • Bubble Level, 1/ea
  • Laminated Gaskets for Caster, 2/pk
  • Buffer Dam, 1/ea
  • Spacer-Mate Alignment Template, 1/ea
  • Wonder Wedge Plate Separation Tool, 1/ea
  • Gel Seal, 1/ea
  • Combs, 15-well, 1.5 mm thick, 2/pk
  • Spacers, 1.5 mm thick, 2 cm wide, 4/pk

Hoefer® Standard Basic Unit (SE600)


The same as above without the combs and spacers. Order two SE511 combs and two sets of 16 cm long spacers separately.

 

Proudly made in the USA! Click here for more made in America products!

Item#:
ASHOFRSE600ES
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