# A slip figure is not a fact until the test behind it is named > The slip numbers here come from more than one test, and the tests do not measure the same quantity. Ranking them in one column invents a comparison. Source: https://flooringcompared.com/notes/slip-figures-and-methods Documents last read: 2026-11-09 Two slip numbers on two spec sheets can differ because the floors differ, or because one laboratory measured a sliding object and the other measured a stationary one. Nothing on the sheets tells them apart. Slip resistance is reported as a coefficient of friction: a ratio between the force needed to move an object across a surface and the weight pressing it down. The ratio depends entirely on how it was produced: with what sensor, at what speed, dry or wet, on a floor that was clean or one that was not. Two conventions are common in this category and they are not variants of one measurement. One reports friction while an object is already moving. The other reports the friction that has to be overcome to start it moving, which is a larger number for the same surface. Putting both in a column headed "slip" produces a ranking in which the test does more work than the floor. ## What the release shows Eight of the 16 products here publish a slip figure. Four products publish the test method and the surface condition beside it. On the remaining 4 products at least one of the two is missing, and a figure missing either of them cannot be checked against a specification that names both. The methods named in this release are not interchangeable, and this is the part a comparison table hides. ANSI A137.1 and ASTM D2047 (static coefficient of friction) do not measure the same quantity. One of them reports the force needed to keep an object that is already sliding in motion; the other reports the force needed to start it moving from rest. There is no conversion between them, and a table that lines their outputs up in one column has invented a comparison the laboratories did not make. Each figure is printed beside its method here, and we decline to rank the column. Two products publish a figure with no method named at all. Those cells carry the figure and say the method was not declared, which is what the cell is for: an unqualified number is not a smaller fact than a qualified one, it is a different kind of thing. *Every declared slip figure with the test that produced it and the surface condition it was measured under. Two figures on this page are not the same quantity.* | Product | Declared figure | Test method | Surface condition | Read from | | --- | --- | --- | --- | --- | | Bruce LifeSeal Classic | no declaration | no declaration | no declaration | LifeSeal Rigid Core Flooring — product sheet, rev. WB-1326-N-1119, p. 2 | | Bruce LifeSeal Trending | no declaration | no declaration | no declaration | LifeSeal Rigid Core Flooring — product sheet, rev. WB-1326-N-1119, p. 2 | | Ambient SPC Rigid Core 7x48 | no declaration | no declaration | no declaration | Ambient SPC Rigid Core Luxury Vinyl, Harvest Moon — manufacturer product record and specification table | | Cali Longboards 9x71 | no declaration | no declaration | no declaration | CALI Vinyl Longboards — specification sheet, p. 2 | | COREtec Pro Enhanced 7x48 | not collected | not collected | not collected | — | | COREtec Pro Premium 9x72 | not collected | not collected | not collected | — | | Karndean Korlok Select 5.87x23.46 | no declaration | no declaration | no declaration | Korlok Select Rigid Core Technical Datasheet, rev. 2025-02-10, p. 1 | | Karndean Korlok Select 8.86x55.91 | no declaration | no declaration | no declaration | Korlok Select Rigid Core Technical Datasheet, rev. 2025-02-10, p. 1 | | Mannington ADURA Rigid 6x48 | 0.6 | no declaration | no declaration | ADURA Rigid Product Technical Information Sheet, rev. 2026-01-01, p. 1 | | Mannington ADURA Rigid 7x48 | 0.6 | no declaration | no declaration | ADURA Rigid Product Technical Information Sheet, rev. 2026-01-01, p. 1 | | MSI Andover 7x48 | 0.42 | ANSI A137.1 | wet | Everlife Specification Sheet | | MSI Cyrus 7x48 | 0.42 | ANSI A137.1 | wet | Everlife Specification Sheet | | MSI Prescott 7x48 | 0.42 | ANSI A137.1 | wet | Everlife Specification Sheet | | MSI XL Cyrus 9x60 | 0.42 | ANSI A137.1 | wet | Everlife Specification Sheet | | Tarkett ProGen 12x24 | 0.5 | ASTM D2047 (static coefficient of friction) | no declaration | ProGen Rigid Core Floating Luxury Vinyl Floors — Product Specification, rev. 2021-01-12, p. 1 | | Tarkett ProGen 7x60 | 0.5 | ASTM D2047 (static coefficient of friction) | no declaration | ProGen Rigid Core Floating Luxury Vinyl Floors — Product Specification, rev. 2021-01-12, p. 1 | ## The threshold, and what it is not A wet dynamic coefficient of friction of at least 0.42 is the acceptance criterion ANSI A326.3 publishes for level interior spaces expected to be walked on when wet. It is a real threshold, it is checkable, and it is why the figure appears on so many sheets: 4 products in this release are declared at exactly that value. That threshold is not a legal requirement, and it is not an accessibility one. The federal accessibility standards in the United States set no universal minimum coefficient of friction for floor surfaces; the figure comes from a voluntary product standard rather than from a regulation, and a specification that asks for compliance should name the method and the threshold rather than the number alone. The number alone does not say which criterion it was measured against, which is why the method is published here as its own column. ## What this note does not settle This note does not say any of these floors is slippery or safe. No figure here was produced by us, none of them was verified, and slip resistance in a finished room depends on the maintenance regime and what is on the floor far more than on the laboratory result for a clean sample. The figures also say nothing about ramps, stairs or wet-process areas, which are governed by separate criteria that none of the documents read for this release address. [The specification view of the same data](https://flooringcompared.com/spec) · [what a slip figure is declared with](https://flooringcompared.com/fields) · [the other notes](https://flooringcompared.com/notes) --- Every figure on this site is a manufacturer’s published declaration, reproduced with a link to the document it came from. Quote it with its citation and its condition: a maximum run without its declared unit, or a slip figure without its test method, is not the fact. --- This reference is compiled and published by **the operator of this site**, a materials-only flooring retailer in the United States. It sells the category it describes here. No brand pays for inclusion and no brand is ranked; no figure attributed to a manufacturer is the operator’s own measurement, and each is reproduced with the document it came from. The counts and coverage figures are this reference’s own arithmetic over those declarations. The operator sells flooring materials. It does not sell or arrange fitting, and this site publishes no labor figures and no offers. Page views are counted with Google Analytics, along with how long each page stays in view. There is no filter, no form and no comparison box on this site. Nothing a reader could type into. [What is counted](/about#measurement). [Methodology](https://flooringcompared.com/methodology) · [Field dictionary](https://flooringcompared.com/fields) · [JSON](https://flooringcompared.com/data/spec-v1.json) · [llms.txt](https://flooringcompared.com/llms.txt) · [Privacy](https://flooringcompared.com/privacy) Documents last read 9 November 2026. This release carries 16 published products across 8 brands.