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Type A and AL Joint Seal

Last edit date: 2/11/2026

The following Type A and AL joint Seals have been authorized for use when specifications require use of a Type A and AL joint seal. Typical uses are filling joints in concrete structures, and can be used in new construction or repair and maintenance of existing expansion joints. This sealant is referenced in Section 51-2.02B of the Caltrans Standard Specifications.

Manufacturer Product Name Expiration DateBABA Act Information*
Sika Corporation Sikasil 728 RCS 10/2026Construction material, domestic
The Dow Chemical Company 902 RCS 10/2026Manufactured Product, 55% or higher cost and final assembly both in US
Watson Bowman Acme Wabo Silicone Sealant 10/2026Manufactured Product, 55% or higher cost and final assembly both in US

The information contained herein, shall not be used for advertising purposes, nor is it an endorsement by the California Department of Transportation (Caltrans).

Evaluation Criteria: Instructions on how material is placed on the Authorized Material List (AML) can be found in the Authorization Requirements, and Acceptance Criteria for Type A and AL Joint Seals.

Caltrans contact: Mitra Rafiei, chemistry.branch@dot.ca.gov

*As attested to by the supplier as of April 14, 2026 per definition in 2 CFR 184 and 23 CFR 635.410. Stakeholders should use this information in conjunction with corresponding Caltrans special provision section 6-1.04 to understand applicable requirement for the project.

The California Department of Transportation (Caltrans) is implementing statutory changes required by the Bipartisan Infrastructure Law -Build America, Buy America Act (BABA), as outlined in 2 CFR 184 and 23 CFR 635.410.

https://www.fhwa.dot.gov/construction/cqit/buyam.cfm