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Can you liquid roof be applied with a Graco X7 airless paint sprayer

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I want to spray the roof of my garden sheds and a 20 foot metal shipping container.

I would like to use an airless sprayer like the Graco X5 or X7.

Are they suitable for applying your product?

asked Jul 6, 2016 in Liquid RV Roof Magic by Pete Summers

1 Answer

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here are the specifics on the spray equipment

The following recommendation is for Graco equipment. Other manufacturers with comparable pumps may also be used.

Liquid Rubber must be thinned with solvent to achieve a sprayable viscosity. See recommendations below.

Equipment capable of spraying Liquid Rubber

Pump ModelMax.
Graco GH7333500 psi3.0 gpm 1/2 inch150 feet
Graco GH364036000 psi3.8 gpm 1/2 inch150 feet
GunShould be rated for spraying mastics. A 30-40 inch tip extension is recommended
Tip Size .017 to .021 with a 12 inch fan width

Note: Do not use a “whip” between hose and gun. This reduces flow and pressure which results in poor atomization.

Thinning Liquid Rubber

The “as shipped” viscosity of Liquid Rubber is 34-37,000 cp which is too high for spraying. By adding one gallon of Xylene Solvent to a 5 gallon pail the viscosity drops to 10,000 cp at 75° F. More solvent may have to be added at lower temperatures.

The spray atomization can be improved using a smaller tip size or adding more solvent to reduce viscosity.

Wash solvent from previous pump cleaning can be used for thinning after it is strained to remove dirt.

answered Jul 6, 2016 by admin