FAQ

Corbro HM1 Underlay

Why is HM1 underlay different from regular foam/rubber products?

HM1 Underlay is engineered for the therapeutic support and load distribution for large animals. It utilizes a chemically cross-linked polymer blend to achieve optimal performance no fillers are used in the manufacture of Corbro HM1 underlay.

Is Corbro HMI underlay waterproof?

Yes. Corbro HM1 is closed cell

Where is Corbro HM1 underlay made?

Corbro HM1 underlay is manufactured in Australia and meets Australian Industry Standards in manufacturing and polymers. No fillers are used in the manufacture of Corbro HM1 underlay.

What is the best way to configure sheets?

You can use Corbro HM1 underlay to cover the entire area or target specific areas as needed - choosing how to configure the sheets is entirely yours. However, we recommend a minimum width of 50mm for optimal results when working with off-cuts.


Should I work undercover during installation?

Yes to prevent any expansion of the HM1 sheet always work out of direct sunlight during installation

 

Does Corbro HM1 underlay require an upper layer?

Yes Corbro HM1 is an underlay. We recommend a rubber or similar covering of a flexible nature as an upper layer.

How thick should the upper layer be?

The thickness of the upper layer of rubber is subject to personal preference, considering factors such as the type and size of the animal and the intended application. Below is a general guideline of thicknesses utilized with HM1 underlay over the past 30 years.

Veterinary: Intensive care - 4mm-8mm

Floor/Wall: General - 6mm -10mm     

Does Corbro HM1 underlay need to be bonded to a surface? 

Yes, bonding HM1 underlay to a surface effectively prevents foreign materials from infiltrating beneath the sheet and also ensures the sheets remain securely in place, preventing any shifting or movement."

Does the upper layer need to be bonded to the Corbro HM1 underlay?

Yes bonding the upper layer to the HM1 underlay effectively prevents foreign materials from infiltrating beneath the upper layer and the HM1 underlay also ensures the upper layer remains in place.

What do I cut Corbro HM1 underlay with?

Corbro HM1 underlay can be cut with a utility/Stanley knife or a fine-toothed blade when using power tools.

What adhesive should I use with Corbro HM1 underlay?

In general, adhesives designed for rubber work well with Corbro HM1 underlay, which is compatible with a broad range of adhesives for a strong, load-bearing bond. For the best results, it is advisable to consult your local adhesive supplier to select the ideal adhesive for your specific needs. Ensure that the adhesive is compatible with both the underlay and the surfaces being bonded. Flexibility is crucial, especially if the foam is part of a moving or flexible structure. The adhesive should allow the foam to bend and move without losing its bond. The bond required between the rubber top layer and the HM1 underlay should be a destructive bond (see below).


Destructive Bond ?

A destructive bond occurs when the top layer (rubber) detaches from the bottom layer (HM1 underlay foam), leaving visible traces of the foam stuck to the underside of the rubber. To ensure a proper bond, it is advisable to conduct a test sample before installation to verify whether a destructive bond has been achieved.

 

Repairing & Re-bonding

HM1 underlay is a closed cell, so when re-bonding HM1 underlay or repairing sheets it may assist in roughening the surface (HM1) with sandpaper to help with adhesion. scoring the foam will also create adhesive hooks. Alway make sure surfaces are cleaned thoroughly before re-bonding. 


When do I need to bevel/slope the edge of Corbro HM1 underlay

If Corbro HM1 underlay doesn't align with a surface and is left exposed, we advise cutting a tapered or sloped edge before attaching the upper layer. This precautionary step helps prevent tripping hazards and ensures a smoother surface for bonding the upper layer of Corbro HM1 underlay.