West System 300 Mini Pumps Epoxy Metering Pump Set

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West System 300 Mini Pumps Epoxy Metering Pump Set

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West System 300 Mini Pumps Epoxy Metering Pump Set

300 Mini Pumps are designed for convenient and accurate metering of Group Size A, B, and C WEST SYSTEM 105 Resin-based epoxy. The 300 Mini Pump Set Contains one resin pump and two hardener pumps. Pumps mount directly on the resin and hardener containers and eliminate the mess involved with measuring by weight or volume.

300 Mini Pumps are calibrated to deliver the proper working ratio with one full pump stroke of resin for each one full pump stroke of hardener. 105/205-206 pumps deliver approximately 0.8 fl oz of resin/hardener with one full stroke of each pump. 105/207-209 pumps deliver approximately 0.9 fl oz of resin/hardener with one full stroke of each pump.

Made of durable polypropylene, the Mini Pumps give years of dependable service. Read and follow the priming, ratio verification and operating instructions that come with the pumps.

As packaged, the pumps are ready to install on the Group Size B containers. A package of extension tubes for Group Size A containers is included with the set. Group Size C extension tubes are included in the 105-C Resin and in the 207-SC or 209-SC packages.

Accurate Metering

WEST SYSTEM Epoxy Metering Pumps are calibrated for accurate metering of WEST SYSTEM Epoxy Resin and Hardener at the proper mix ratio, while eliminating mess and guesswork. The correct epoxy resin to hardener ratio is important to ensure that the epoxy reaches its full potential for cured physical properties.

Ratio Verification

The ratio of each pair of Mini Pumps is controlled by the installation of a clip, that limits the stroke (and volume) of one or both of the pumps. All Mini Pumps are carefully inspected during this operation and during packaging. But the final test of a pump’s performance can’t be made until it is actually pumping resin or hardener. The ratio verification test described in the instructions confirms that both pumps are dispensing the correct volume and that the ratio of resin to hardener is within a critical narrow range.

Why Use Epoxy Metering Pumps?

Epoxy metering pumps ensure you’re using the correct ratio of resin to hardener, crucial to epoxy performance. Depending on the hardener you select, WEST SYSTEM Epoxy is mixed at a ratio of five parts resin to one part hardener, or three parts resin to one part hardener. At the proper mix ratio, the number of chemically reactive sites in the resin balances the number of reactive sites in the hardener. The resin molecules are larger than the hardener molecules, and have few reactive sites, hence the 5:1 or 3:1 ratio. When the mix is stirred thoroughly, the resin and hardener molecules react to develop full strength.

If the mix contains excess hardener, hardener molecules will remain unreacted in the cured epoxy, weakening it. They can also prevent subsequent paint coatings from setting up. NOTE: Never add extra hardener in attempt to alter cure speed. This will only throw the resin-to-hardener ratio off, preventing the epoxy from reaching its full potential, and possibly even keeping it from hardening.

Many people epoxy in small batches, mixing several ounces at once. The most popular epoxy metering pumps are 300 Mini Pumps. They get the job done 95% of the time.

Epoxy Metering Pumps for Fast Dispensing

WEST SYSTEM Positive Displacement Pumps dispense epoxy faster than any pump they’ve ever offered. Positive Displacement Pumps work by trapping a fixed amount of resin and hardener then forcing (displacing) that trapped volume into the discharge pipe. This offers improved epoxy pumping performance because changes in viscosity due to temperature change do not affect their performance.



Convenient and reliable metering of WEST SYSTEM epoxy

For 105 Resin and hardeners in Group A, B and C containers

Contains one resin pump and two hardener pumps

Pumps mount directly on the resin and hardener containers

Eliminates mess involved with measuring by weight or volume

Calibrated to deliver the proper working ratio

One full pump stroke of resin per one pump stroke of hardener

105/205-206 pumps deliver about 0.8 fl oz of resin/hardener

105/207-209 pumps deliver about 0.9 fl oz of resin/hardener

Made of durable polypropylene for years of dependable service


West System 300 Mini Pumps Epoxy Metering Pump Set

  • Dimensions: 3.0 inches (H) x 16.0 inches (W) x 10.0 inches (L)
  • Weight: 1.0 pounds
  • Made in United States

The Fine Print

  • This item is sold through the Focus Camera operated by Focus Camera.
  • The merchant is solely responsible to purchasers for the fulfillment, delivery, care, quality, and pricing information of the advertised goods and services.
  • The product is new.
  • Product eligible for free returns within 30 days.
  • Shipping and handling charges will be Free.
  • United States (excluding Alaska & Hawaii) Shipments only.
  • Does not ship to PO boxes.
  • Orders are typically delivered in 5-10 business days.