Fire Block · Documents read 2026-09-16
Akfix 840 Fire Block
2017 Akfix sheets give DIN 4102-1 B2 and "UL listed" for a 900 g pack, not the US cans; the straw can’s store page is empty.
1 of four things confirmed
These are the four things we could check for a fire block can, and nothing else. Not a performance score: nothing on this page was applied or tested by us. How the fire block page is ordered.
- Brand data sheeta safety data sheet or a brand page is published, no technical data sheet found
- Claim checkableThe Akfix sheets give DIN 4102-1 class B2, a German rating with no US equivalent, and the words "UL listed" with no file number, for a 900 g pack rather than the cans sold here. ICC-ES listing ESL-1058 names the foam for surface burning only. No fireblocking test with a number that can be looked up stands behind the claim.
- Brand-channel sellerSold by Wios Global Trade LLC, which carries only the Akfix line in our intake.
- 100 or more ratings9 ratings on the anchor listing, under the 100 we ask for
Before you decide
Akfix 840 Fire Block, Straw, 12 oz; 840P gun, 25.3 oz
- Format
- Straw, 12 oz; 840P gun, 25.3 oz
- Job
- Fire Block
- Documents on file
- 4, last read 2026-09-16
- Claim checkable
- Not on the documents we hold
Research summary, not a hands-on test. Product claims on this page are attributed to the sources and dates shown. Before use, read the exact product label, the current safety data sheet and the application instructions, and confirm ventilation, protective equipment, occupant isolation and re-entry or reoccupancy conditions. A surface-burning classification alone does not establish approval to leave foam exposed or to use it in a particular assembly.
Report a product error The claim What the documents state Documents Sizes and prices Right of reply
The claim, in the seller's words
"Orange Color Fire Retardant Polyurethane Expanding Foam" on Amazon. The Akfix sheet: "a self-extinguishable multi-purpose polyurethane foam which provides moderate fire safety," "Conforms to fire class B2 according to DIN 4102-1," "UL listed." What the documents state
| Fire | DIN 4102-1 class B2 and "UL listed" with no file number on the Akfix sheets; no US surface-burning figure; "fire retardant" in the listing titleTDS REV.06 and listing |
|---|---|
| Document scope | The 840 and 840P sheets name a 900 g pack, not the 12 oz straw or 25.3 oz gun cans sold in the US, so their figures are not verified for these cansTDS REV.06 |
| Listing | ICC-ES ESL-1058 names 840 and 840P FireBlock Insulating Foam Sealant for surface burning at a 1/2 in bead, flame spread 25 or less and smoke developed 450 or less; it is not a fireblocking testESL-1058, April 2026 |
| Sizes | 12 oz straw and 25.3 oz gun cans, 1 to 12 packs, with or without gunListings |
Our reading
Akfix’s fire block reaches Amazon in ten listings and its own US store in an empty product page for the straw can. The sheets are elsewhere: on akfix.com, and behind the 840P gun foam page on the same store. Both are 2017 revisions that give DIN 4102-1 class B2 and the words "UL listed", and both describe a 900 g pack rather than the US cans. ICC-ES listing ESL-1058 names the foam for surface burning at a half-inch bead. None of that is a fireblocking test, and a sheet written for the cans sold here is what would move this record.
Still open
- The brand store page for the 12 oz straw can has no description and no document.
- No sheet names the US 12 oz or 25.3 oz cans.
- Pack sizes in the listing titles changed between September 7 and 8 on two ASINs.
Documents on file
- PAGE Akfix store product page no date or revision printed read 2026-09-08 The page has prices and no description or documents on September 8, 2026.
- TDS Akfix 840 B2 Fire Rated PU Foam, technical data sheet REV.06, 02/05/2017 read 2026-09-16 On akfix.com. Names a 900 g pack.
- TDS Akfix 840P B2 Fire Rated PU Gun Foam, technical data sheet REV.06, 04/05/2017 read 2026-09-16 Linked from the 840P gun foam page on the Akfix US store and published on akfix.com. Names a 900 g pack.
- ESL ICC-ES Listing Report ESL-1058 Reissued April 2026 read 2026-09-16 Names this foam for surface burning at a nominal 1/2 in bead: flame spread 25 or less and smoke developed 450 or less to UL 723 and ASTM E84. It is not a fireblocking test.
Sizes and prices, latest read October 29, 2026
Each displayed price is what that listing showed on the date printed in its row; ratings were read October 29, 2026. A pack with no price is one where the listing showed none, where the figure contradicted another variant, or where its last successful read passed the freshness window. Prices are snapshots, each dated where it appears, not live figures, so check the seller before you pay.
1 of the 9 listings below showed no purchase option on October 29, 2026, so they carry no price.
| Pack | Price | Per ounce | Demand | |
|---|---|---|---|---|
| 1 x 12 oz | $14.99 read Oct 29, 2026 | $1.25 | not shown | Check price |
| 2 x 12 oz | $24.99 read Oct 29, 2026 | $1.04 | not shown | Check price |
| 12 x 12 oz | no price shown read Oct 29, 2026 | not comparable | not shown | Check price |
| 1 x 25.3 oz | $14.99 read Oct 29, 2026 | $0.59 | not shown | Check price |
| 2 x 25.3 oz | $25.99 read Oct 29, 2026 | $0.51 | not shown | Check price |
| 6 x 25.3 oz | $74.90 read Oct 29, 2026 | $0.49 | not shown | Check price |
| 12 x 25.3 oz Cheapest per ounce | $124.79 read Oct 29, 2026 | $0.41 | not shown | Check price |
| 6 x 25.3 oz with gun | price withheld read Oct 29, 2026 | not comparable | not shown | Check price |
| 12 x 25.3 oz with gun | no price shown read Oct 29, 2026 out of stock when read | not comparable | not shown | Check price |
As an Amazon Associate I earn from qualifying purchases. That fee never sets the order or the score.
Jobs where a can from this category is part of the answer
These pages name the category rather than this particular can. Each one sets out the constraint that decides the product for that assembly, the code section that applies, a worked quantity example, and where foam is the wrong answer.
- Attics As fire block foam. Where a penetration between floors is a fireblocking location, the orange can needs a real surface-burning result; the fire block page sorts the claims.
- Garages As fire block foam. Penetrations through the separation wall are where a fireblocking claim is actually asked for.
Compared side by side
Others on the fire block page
All 10 fire block records
Questions and answers
Questions about Akfix 840 Fire Block
Answered from this product’s documents and listings, the same records the rest of this page is built from.
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Does Akfix publish a data sheet for the 840 Fire Block? From the records
A safety data sheet or a brand page is published, no technical data sheet found.
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Can the fire block claim on this can be checked? From the records
The Akfix sheets give DIN 4102-1 class B2, a German rating with no US equivalent, and the words "UL listed" with no file number, for a 900 g pack rather than the cans sold here. ICC-ES listing ESL-1058 names the foam for surface burning only. No fireblocking test with a number that can be looked up stands behind the claim.
-
Who sells the Akfix 840 Fire Block on Amazon? From the records
Sold by Wios Global Trade LLC, which carries only the Akfix line in our intake.
We have not sprayed or tested this product. Every figure above names the document or listing it came from, and where a maker publishes nothing the record says so. The photograph is the maker's own product shot where one is published; this one came from the brand store. Read the rating method and our editorial policy.
Akfix has a right of reply
Everything on this page is a dated reading of documents that can change. If you make or sell this product, or you have read something here that is wrong, send the document. Every submission is read against the record; where it changes the record, the change is dated on the page, and where it does not, the reply says why. A submission cannot buy a position or remove a finding the documents still support, and what moves a record is written down.
Write to the research desk or copy research@beestsprayfoam.com