Pest-block evidence story

Foam alone is not a rodent barrier

Use metal for exclusion; foam seals air around that durable closure.

This is an evidence order, not a field test

We check the product file, pest-claim traceability, marketplace identity and buyer feedback. None publishes a chew test.

1. Sprayman Pest Blocker

Published sheet, matched seller and largest feedback base; active ingredient not named.

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2. Kraken Bond PestSafe

Dated sheet; store and sheet conflict on pesticide wording.

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3. Stanley F993

Dated sheet: 1-to-3-inch gaps. SDS lists 1,4-dichlorobenzene without naming it active.

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Match the claim to its mechanism

A treated article protects the foam. A physical seal closes an opening. A claim to control pests in the building needs different evidence.

Build the closure in the right order

Inspect and size the opening, repair water or damage, secure gnaw-resistant material, then seal around it with the exact labeled foam.

Read every limitation before purchase

See all eight products, formats, listings, documents and unresolved claims in the full ranking.