Product Description

Caltrans Strip Waterstops

The Caltrans Strip Waterstops is the perfect rubber component in applications that require the containment of water. The WARCO waterstop will adapt to fill any space under a wide range of temperatures, it will expand as your materials shrink or compress as your materials expand. It has been commonly used for water gates, stationary walls, and expansion joint applications. Color: Black

We also offer the Caltrans Bearing Pad. Made in the USA.

Our Cage Code is 06470.

Samples available upon request.

Key Aspects

Temperature Range:-40°F to +200°F
Durometer (Shore A ± 5):55
Tensile:2700 psi
Finishes Available:Smooth, Nylon
Talc:Talc-Free Available
Specification:Caltrans 51-2.04 Waterstops
Compound Number(s)Part Number(s)

We comply with the Buy American Act requirements.

Advanced Technical Details

(Shore A ± 5)
Estimated Weight
Per Linear Foot
(1/8″ x 36″)
1/8 – 1/236, 482700 psi420%-40°F to +220°F2.56 lbCaltrans 51–2.04 Waterstops

This product complies with the following requirements:

PropertyTest MethodRequirement
Tensile StrengthASTM D 4122,000 psi min.
Ultimate ElongationASTM D 412300% min.
Compression Set,
22 hours at 70° C
ASTM D 395, Method B30% max.
Tear StrengthASTM D 624, Die C26 kN/m min.
Type A
ASTM D 224055 ± 5
Ozone Resistance 20% Strain,
100 hours at 100 ± 2.2° F
ASTM D 1149
except 100 ± 20 parts per 100,000,000
No cracks
Brittleness Temperature
at -40° C
ASTM D 746, Procedure BPass
Flame PropagationASTM C 542Must not propagate flame
Change in Volume,
IRM 903, immersed 70 hours at 100° C
ASTM D 47180% max.
Change in Mass,
immersed 7 days at 70° C
ASTM D 47115% max.

After accelerated aging under ASTM D 573 for 70 hours at 100° C, the properties do not change greater than the following:

Tensile Strength-15%
Elongation at Break-40%
Hardness+10 points

Compound Number: 055E0507(55E507)

Unsure on how to read our compound number? Read the page, “How to Read a Compound Number”.

Our rubber products are a proprietary blend of various polymers formulated to meet stated physicals and specifications. The named product polymer is not necessarily the primary polymer representing the highest percentage of the polymer blend. Determination of the suitability of the goods for the uses and applications contemplated by Buyer and others shall be the sole responsibility of the Buyer or user. No guaranty is given with respect to length of service on any particular application. Suggestions or recommendations made by Seller in its product literature concerning uses or applications of the goods are believed to be reliable, but Seller makes no warranty or guaranty of results to be obtained since the conditions of the use and application by Buyer and others are beyond Seller’s control. The specification listed here, Caltrans, refers to the organization Caltrans set out by the California Department of Transportation which manages more than 50,000 miles of California’s highway and freeway lanes, provides inter-city rail services, permits more than 400 public-use airports and special-use hospital heliports, and works with local agencies. Their website can be found here: The specification listed here, ASTM, stands for the American Society for Testing and Materials which is the developer and provider of voluntary consensus standards, related technical information, and services. Their website can be found here:

View complete Terms & Conditions of Sale for suitability of use and formulations

Other Waterstop Products

Extruded & Molded Rubber Waterstop System

  • Product Description: A uniquely engineered system to adapt to various applications to keep liquids in or out of structures.