Welcome to Conceptual Polymer
where innovation is the norm!

Thank you for spending some of your valuable time to peruse our website.

Please be sure to email or call if you have any questions or comments.

View our extensively researched white paper on PCV Oil Removal. Click Here to View



Creative Catch Cans

We started with billet aluminum, added dual-density filtration, then introduced the world's first glass versions of air/oil separators.

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Highly Visible

How do you time your workout rest periods? That's easy; just glance at the worlds first Fitness Clock with giant carbon fiber second hand!

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Incredibly Handy

Need to verify internal and external metric threads and screw lengths with something that will look great on your desk or work bench? Have we got just the right thing for you!.

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About Us

Conceptual Polymer has been around since 2004 when we started out by designing and offering for sale polyurethane shifter knobs. Soon after, we focused our attention on crankcase vapor filtering technology.

Along the way, we paid careful attention to you, our customers who offered helpful suggestions relating to new product enhancements and offerings.

Occassionally you'll see some non-automotive innovations like our new Fitness Clocks.

One thing's for sure, "conceptual" will always be a part of who we are. Thank you for being the best customers we could ever ask for!


Metric Thread Checker 

metric thread checker 

Fitness Clocks 

Fitness Clocks 2019 
Click on Photo for details


1 All of our product designs are built upon 35+ years of engineering, manufacturing, and quality control experience.

2 Each of our products is made right here in the USA.

3 There are no lengthy delays when you need your questions answered. We take pride in always getting back to you within 24 hours.

Our News

  • This Month's Tips:

    If positioning of right-angle fittings for your air/oil separator is critical, you can often substitute Teflon sealing tape with non-curing liquid pipe sealant. Slight rotation from full-tight may provide just the right angle for hose positioning.

    Crankcase vapor oil droblets are more likely to be trapped when filter media is not super heated by engine heat. If possible, mount your catch can as far away from your engine (and lower than the valve covers).

    Many people consider using thread locking compounds to prevent loosening of threaded hardware due to vehicle and engine vibration. Use Loctite 222 (pink) or equivalent for screws M5/10-32 or smaller and Loctite 242 (blue) for screws M6/1/4-20 and larger. If the screw contacts a non-metallic surface, use Loctite 425 (light blue)

    Updated: 7.18.19
  • New designs:

    → Fitness Clocks

    → Designed to time critical rest periods between exercise sets

    Updated: 7.18.19
  • Vacuum Pressure drop:

    Almost any filter media will eventually slow down flow of air or liquids through it. While many vehicle owners note that auto manufacturers recommend filter changes based upon number of miles driven or even recommendations based upon software algorythms that signal "oil life remaining" displays, the most accurate method of determining when a filter should be changed is pressure drop measurement.

    This is why we are working on offering a gauge kit that will be both accurate and reliable. A filter media cleaning kit, along with an accurate way of measuring pressure drop will allow you to clean your filter media only when necessary. Our latest innovation, the Fitness Clock, is currently being tested at one of the largest fitness club chains in the US.

    Updated: 7.18.19


    Each of our air/oil separator designs are pressure tested from -29.5 inches of Mercury to 30 psi. However, let's focus a bit upon filter testing. Scientifically comparing one filter type to another is something few, if any company have the capability of doing. There is an SAE standard for performing comparison tests, but the equipment necessary to accurately measure and monitor oil droplet size and volume is extremely expensive. Labs that have this equipment charge thousands of dollars to compare just a few different air/oil separators.

    Catch can sellers who announce that they tested various catch cans by saturating the filter media with water and then attempting to pull the water through the filter, are not using accurate/consistent enough methodologies to accomplish comparisons that are meaningful. Our filter efficiency is based upon years of research and discussion to augment pressure drop, temperature and volume measurements/data logging on a single vehicle driven as consistently as possible. No, this is not the best way to test, but it is certainly more accurate than some of the ways others are basing their superiority claims.

    Updated: 7.18.19

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