ASTM D5893

ASTM D5893 is the performance specification for cold-applied, single-component, chemically curing silicone joint sealants used in Portland cement concrete (PCC) pavement joints. It defines two material types based on modulus, prescribes the physical and adhesion tests every product must pass, and standardizes the laboratory conditions used to qualify a sealant for highway service.

The standard exists because building-envelope sealant criteria (most notably ASTM C920) do not address the unique demands of pavement joints — wide thermal swings, repeated wheel loading, water and de-icer exposure, and bond to freshly sawn concrete. D5893 fills that gap for cold-applied silicone, while ASTM D6690 covers the hot-applied rubberized-asphalt counterpart.

For a buyer-decision walkthrough that compares D5893 to hot-applied D6690 and preformed compression seals, see the Highway & Pavement Joint Sealant Guide. This page is the standards reference for D5893 itself.

ASTM D5893 applies to cold-applied, single-component silicone sealants intended for transverse, longitudinal, and shoulder joints in Portland cement concrete pavement, including airfield pavements. The scope is deliberately narrow:

• Cold-applied — no heated kettle equipment is required at placement
• Single-component — the material chemically cures in place via atmospheric moisture
• Silicone chemistry — polysulfide, polyurethane, and rubberized-asphalt sealants are excluded from D5893 (see D6690 for hot-applied rubber-asphalt)
• Portland cement concrete substrate — D5893 was developed and validated for PCC, not asphalt concrete

The standard is referenced extensively in state DOT pavement specifications and in FHWA pavement preservation guidance (see the FHWA Pavement Preservation Compendium for federal-level treatment selection criteria). It does not cover bridge deck expansion joints — those are governed by AASHTO LRFD §20 and, for preformed compression seals, AASHTO M 297.

D5893 defines two product types. Both are low-modulus silicone formulations; the difference is rheology — whether the sealant holds its shape after extrusion or flows to a level surface.

Both types are formulated for the same movement service — pavement joints typically open and close 25 to 50 percent of the design width across a season. The Type I / Type II choice is a placement-method decision driven by crew workflow and joint geometry, not a movement-class decision. Neither type is intended for vertical or overhead application.

To carry the D5893 designation, a sealant must meet pass/fail criteria across the following categories. Resilience, bond, and weight loss are the three the standard treats as primary qualifiers.

For preformed polychloroprene compression seals — the alternative when liquid sealant is a poor fit (very small movement, very long maintenance cycle) — see AASHTO M 297. M 297 is referenced here because state DOT pavement specs routinely cross-cite both standards in the same project specification.

D5893 standardizes specimen geometry, substrate type, cure environment, and test sequence so that a Type I / Type II qualification means the same thing regardless of which laboratory ran the work.

• Substrate: mortar or concrete blocks meeting D5893's composition and surface preparation requirements; substrate is the same material the sealant must bond to in service
• Specimen geometry: defined cross-section (typically 1/2" wide x 1/2" deep with a 2" bonded length) so movement strain is uniform across labs
• Cure: standard atmosphere — 73°F (23°C) and 50% relative humidity for the prescribed cure interval before testing
• Companion adhesion testing per ASTM D5894 — D5894 is the test method, D5893 is the product specification; the two are read together
• Conditioning: water immersion and oven aging cycles applied before bond and weight-loss tests to simulate field exposure

Pavement specifications cite D5893 in a small number of recurring patterns. Use these as templates and confirm Type I vs Type II based on the joint geometry and placement method intended.

Spec language for the hot-applied alternative is covered on the ASTM D6690 page; spec language for building-envelope joints is covered on the ASTM C920 page.

Use D5893 when the project conditions favor a cold-applied silicone over a hot-applied or preformed alternative. The selection question is application-driven, not brand-driven.

Joint geometry drives Type I vs Type II: if the spec calls for a tooled, flush or recessed sealant profile, Type I is the default; if the spec calls for pour-and-walk-away placement at production speed, Type II is the default. The width-to-depth ratio (commonly 2:1 for pavement joints) and backer rod selection matter as much as the sealant choice itself — design errors here cause D5893-compliant material to fail prematurely.

US Made Supply does not list pavement-grade D5893 silicone in the public catalog today. We work directly with domestic manufacturers of cold-applied, single-component pavement silicones and can source D5893 Type I or Type II material for project quantities, including matched ASTM D5894 adhesion test documentation for spec submittals.