Description
Devcon Concave Sealer is a thixotropic, two-component crusher liner sealer made to fill voids between concave liners before crusher backing is poured. The non-sagging formula stays in place on vertical surfaces, cures at room temperature, and bonds to metal surfaces in the liner assembly.
Using This Crusher Liner Sealer Before Backing
The published process data separate the backing-pour window from full cure. Devcon states that crusher backing can be poured about 10 minutes after application. Typical working time is 4 to 6 minutes and fixture time is 10 to 15 minutes at about 72°F (22°C). The published functional-cure value is 45 minutes, while full cure is 24 hours. Those times serve different purposes and should not be treated as interchangeable.
This fast handling profile helps maintenance crews close the gaps between concave liner segments without holding the entire repair until the adhesive reaches full cure. The material is formulated to be thixotropic and non-sagging so it remains in the intended gap during application and while the backing compound is placed.
Performance and Application
The product data lists a 1:1 mix ratio by volume and an adhesive tensile lap shear value of about 1,300 psi on ABS under the manufacturer’s test conditions. Published strength varies by substrate and test configuration, so that number is a reference value rather than a universal joint rating. The product is also described as bonding to poorly prepared metal surfaces, but loose debris, standing contamination, and conditions that prevent proper contact should still be removed before application.
Dispense the two components through compatible equipment, mix them completely, and apply within the short working window. Confirm the actual maintenance procedure against the current Devcon TDS, especially when temperature, gap geometry, or downtime requirements differ from the published test conditions.
Product Details
| Property | Detail |
|---|---|
| Product | Devcon Concave Sealer |
| SKU | DEV81091 |
| Package | 250 mL cartridge |
| Mix ratio | 1:1 by volume |
| Working time | 4-6 minutes at 72°F (22°C) |
| Fixture time | 10-15 minutes at 72°F (22°C) |
| Backing-pour window | About 10 minutes after application |
| Functional cure | 45 minutes |
| Full cure | 24 hours |
Browse Chemical Concepts structural adhesives for related repair materials, and use the current Devcon technical data linked from the exact product page for application details.
Need Help?
Need help matching dispensing equipment or planning the sealing step before crusher backing? Call (800) 220-1966 or email [email protected].
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