Tuesday, May 9, 2017

A Heat Insulation Spray-on Coating Alternative to Lizard Skin.

One of the well-known spray-on heat-shield products is Lizard Skin. From their website, “LizardSkin Ceramic Insulation (CI) is an advanced spray on thermal coating that consists of a water-based composition of high-grade acrylic binders with ceramic insulation particles to create a thermal barrier.” The Material Safety Data Sheet (commonly referred to as the MSDS) can be found here.

This sheet shows the composition of Lizard Skin as:

1 - Water 7732-18-5 40-50%
2 - Resin Polymer 00-00-00 20-30%
3 - Trade Secret Insulation Media 10-20%
4 - Carbon Black 1333-86-4 5-10%
5 - Extender Pigment 1317-65-3 1-5%

It’s relatively expensive at $200 for two gallons. They sell a special gun ($120) to spray it on although it can be applied with a brush or roller.

Substitutes
It's possible to make your own for much less cost.

1 – High solids white latex ceiling paint.

2 - Acrylic Polymer Resin - increases paint flow and durability. One source is Acri-Flow from HyTechSales.com up to 1 pint per gallon.

3 – Glass Microspheres  - One supplier is HyTechSales.com, mixing at the rate of one quart of spheres per gallon of paint, but some sources indicate that as many as 3 quarts of spheres per gallon should be used.

4 – Carbon Black pigment is added to give Lizard Skin its distinctive purple/black color. Any color - or none at all - is OK and can be sourced at your local paint store.

5 – Calcium Carbonate (pulverized dolomitic limestone) adds bulk and texture, sourced at Amazon or hardware stores.

To Spray
You can rent an airless paint sprayer. Use the largest tip available (.019-.024) and remove the filter screens from both the suction tube and inside the handle. The application thickness should be that of a credit card.

For Heat and Noise ControlApply the Lizard Skin-type spray-on coating, then add squares of DynaMat or similar product when fully dry. It's not necessary to cover the entire panel in DynaMat like they show you in the car magazines, small squares or long strips will do just as well.

Out-of-the-Box Alternatives to Lizard Skin
Hy-Tech SC#1000 Sound Control Coasting appears to be a product similar to Lizard Skin for both sound and heat control.


RESOURCES

There are several forum discussion threads about various substitutes and application details.

Alternative Lizard Skin