Should You Test with TRL or 4S Rubber?
Zerofal’s national courier service takes the work out of getting your samples tested. We handle the booking and labels—freight is added to your invoice. Just pack and stick.
Wet pendulum results depend on one critical variable: the slider rubber. Under AS 4586–2013, you must choose either:
4S (Slider 96):
- General footwear simulation
- Used for most indoor and outdoor commercial settings
TRL (Slider 55):
- Softer compound, simulates bare feet or soft soles
- Used for ramps, pools, wet barefoot zones, and some external paths
Some surfaces test well under one but fail the other. For example:
- A P4 result with 4S may only be P2 with TRL
- A tile near a pool may need both ratings to satisfy NCC or HB 198-2014
Zerofal advises on the correct slider based on:
- NCC Table D2.14 or site-specific specs
- Intended installation zone
- Market expectations for use cases
Don’t guess - ask.
Zerofal will help you choose the correct slider and ensure your AS 4586–2013 test is valid for its application.
4S (Slider 96) simulates standard footwear for most commercial settings. TRL (Slider 55) simulates barefoot or soft soles and is used for ramps, pools, and wet barefoot areas.
Slip ratings can shift dramatically between sliders. A surface that passes with 4S may fail with TRL in barefoot zones.
TRL is required for wet barefoot areas like pools, showers, ramps, and some outdoor paths.
Yes. In some areas—like pool surrounds—both 4S and TRL tests may be needed for NCC or HB198 compliance.
Check NCC Table D2.14 or consult Zerofal. We advise on the correct slider based on standards, site use, and safety obligations.
Explore more
How Much Does Slip Resistance Lab Testing Cost?
Slip resistance testing costs depend on surface type, number of samples, and method (wet pendulum or dry friction). This guide explains typical AS 4586 lab pricing, what’s included in a
Cure Time Matters—Avoid Testing Too Soon
Curing is one of the most overlooked factors in slip resistance testing. This article explains how premature testing can understate performance, invalidate AS 4586 results, and cost clients compliance. Learn
Is Your Sample Ready? Prep Checklist
Accurate slip resistance results start before the test begins. This guide outlines how to prepare your samples for AS 4586 testing – covering size, cleaning, curing, and packaging – to
Stay Ahead of Safety Standards
Join the Zerofal newsletter for actionable insights on slip testing, compliance updates, and smart prevention strategies. No spam – just practical safety advice.