Marabu ClearShield® Canvas Guard

ClearShield Canvas Guard is the ideal coating for canvas and Giclee applications. It is specifically formulated for flexibility so that canvas can be stretched after coating.
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ClearShield Canvas Guard is the ideal coating for canvas and Giclee applications. It is specifically formulated for flexibility so that canvas can be stretched after coating.

ClearShield Canvas Guard is specifically formulated for use over water-resistant canvas and Giclee applications. Designed with flexibility in mind, Canvas Guard allows users to stretch the canvas after coating without any cracking. It is formulated to work on micro porous and porous ink jet receptive layers and helps to reduce pinholes normally encountered when applying coatings to ink-jet canvas. Canvas Guard can be applied using all hand application methods, such as a short-nap roller application. ClearShield Canvas Guard is the ultimate protection for canvas applications.
Note: For gel coated and other water sensitive canvas and dye-based inks please use our ClearJet Fine Art Product line.


→ State of the Art UV-inhibitors
→ Protects from abrasion and marring
→ Highly flexible
→ Chemically resistant
→ Non-yellowing
→ Enhances color

How To Apply
We recommend using either a high-density foam roller or a 3/16" short-nap roller (our in-house favorite). Saturate the roller with ClearShield Canvas Guard and then allow the access coating to fall back into the tray. The coating should not be dripping off the roller. Apply one thin coat, moving from one side of the canvas to the other. It is not necessary to have a wet, saturated film across the entire surface. Allow the first thin coat to dry to the touch. This should take about 30 minutes to an hour. Apply a second thin to medium coat in the same manner as the first: from side to side.

Apply with spray, foam applicator, or roller.

ClearStar ClearShield Type C Brochure

ClearShield vs. ClearJet Comparison Chart

ClearShield® FAQS:

How do I know which clear to use?
ClearShield is a water-based clear coating designed for use over any material that is not sensitive to water. It is specially designed for use in the grand and super-wide format industries, for use over electrostatic and thermal output, and on pigmented and piezo output which is printed on non-water-sensitive media. Also great for use over traditional signage materials.

ClearJet is a clear coating designed for use over most material, water-sensitive or not.

Do I need to have any special equipment to apply clear coats?
No, this is an inexpensive alternative to lamination.

ClearShield may be applied with a pad or low-napped roller, or conventional spray equipment. Foam applicators have irregular edges, so if you choose this method of application, make sure to apply wet coats.

Can I clearcoat GO, GS and GX inks?
GO inks work well with ClearShield because they are not water-sensitive.
GS and GX inks work best with ClearJet because they are water-sensitive.

How do I determine which clear is best for my purposes?
Typically the simplest way to begin is to determine if you have any water-sensitive materials. If you do, try ClearJet. If there are no water-sensitive materials, ClearShield could work very well for you.

Can I clear coat very small jobs?

Can I coat extremely large jobs?
Absolutely. ClearShield and ClearJet are used by some of the largest producers in the super-wide format printing industry.

Can I use ClearStar on floor graphics?
These products are not designed for high wear floor graphics. You probably need to use a 2-part urethane for maximum wear resistance.

Can I use ClearStar on paper and then bring it outdoors?
Yes, but make sure that your paper is well coated on all sides and edges. If the edges are not coated, they will wick and absorb water.

Can I use ClearStar's clear coatings for decks?
No, there are many products designed specifically for application on decks. See your hardware or construction supplier.

How much increased longevity should I expect with ClearStar's coatings?
Since there are thousands of possible combinations of substrates, ink receptive coatings, and inks, we have not done testing on all systems.

In some systems we have seen durability doubled. In other systems we have seen a 50% improvement. Yet in other systems limited enhancement is noted. The variability can be attributed to differences in the fundamental integrity of the ink coupled with the film thickness of the applied UV coating. Significant water repellency, abrasion and mar resistance are noted in virtually all applications. We have had no failures to date with either ClearShield or ClearJet.

What about protection from the rain and weather?
Our clears are designed as UV protective top coats. Since our clears are also abrasion and chemical resistant, they of course will protect from rain, wind-blown particles and other weather related conditions. If you are coating water-sensitive media with ClearJet, be sure to coat the edges, since water can wick from exposed areas.

Do you offer warranties?
No. There are too many variables.

In addition to the combinations of materials over which our clears can be used, worldwide climactic conditions vary significantly. However, we have extensively field-tested our products and are completely confident that they are the highest quality UV protective clear coatings on the market. Our products are being used in the harsh climactic conditions and high UV exposure areas of the Middle East. We have field tested our products for over 3 years in south Florida exposure and have found no significant degradation of our clears. We are confident that you will add significant longevity to your products by using ClearShield and ClearJet.

Can I use ClearShield on traditional painted signs or signs with applied vinyl?
Yes. These clear coatings help protect signs and make them look great.

Can I use ClearShield as a primer or barrier coat under enamels?
No, these are true topcoats and are meant to be chemical resistant. Paints and other materials will not stick well to the dried surface.

Can I use ClearShield on vinyl banners?
Yes, ClearShield and ClearJet are great on vinyl banners. These products are very flexible. They resist plasticizer migration too, so you banner will not only last longer, but will stay cleaner.

Is ClearShield graffiti-proof?
No, not per se. You need to specify ClearShield Anti-graffiti for this application. Our anti-graffiti coating is the ultimate for flexibility, chemical resistance and uv resistance. This two-component, water-based clear coat can be easily cleaned with solvent or specify Clearstar's non-petrochemical citrus based cleaner for removal.

Is ClearShield renewable?
Yes. Just repeat the application if needed.

Do multiple coatings over time enhance UV protection?
Clear coats are renewable, but increasing the thickness of the coating beyond that which is recommended will not add significantly more UV protection.

What are ClearShield's greatest limitations?
ClearShield is a waterbased product, so you cannot use it over materials which either resist water or those that are water-sensitive. For example, silicone will repel ClearShield. In this instance, ClearJet is clearly the choice.

ClearShield looks milky in the can. Will it dry clear?
Yes, that is the way it is supposed to look in the can. ClearShield will dry totally clear.

Is there a fast, easy way to apply ClearShield to large graphics?
Yes. Many super-wide printers use a pad applicator designed for applying wax to floors. These are readily available in hardware stores, cleaning supply companies or directly from Clearstar. Saturate the applicator, pour the ClearShield on the print - about a 2" wide pour- and just push it or walk it down the print. A fan will accelerate the dry time. You should get a nice level, smooth, finish.

Should I use ClearShield or ClearJet liquid laminates with the ColorSpan DisplayMakers?
ColorSpan inks are pigmented inks so both ClearShield and ClearJet are compatible with this printer's output.

Why does ColorSpan recommend laminating some of their output and which of Clearstar's liquid laminates might I substitute?
Some ColorSpan output has to be laminated because the surface can be scratched very easily. An example is the back lit media. This is also true with some Roland media. You can typically use either ClearShield or ClearJet for those applications.

I want to laminate Tyvek but it does not laminate well. Can I use a liquid laminate?
Yes. Most shops like to use ClearShield on Tyvek.

I don't like the feel or look of film lamination on banner material. Can liquid laminates give me a more flexible banner with a better look?
Yes. The clear coatings will also provide protection from chemicals, abrasion, UV and marring. Our clear coatings also prevent plasticizer migration, so your banner will last longer and stay cleaner. ClearShield works great on banners.

I hear a lot about accelerated weathering and accelerated UV tests. Can you explain what these mean?
We at Clearstar Coatings always test our products fully and extensively. We feel, however, that too often accelerated tests do not necessarily reflect actual field performance. These tests often have spectrums that do not occur naturally. We are MOST concerned about how the products perform in the field since this is what matters most to our customers. We have our products field tested prior to releasing them. ClearShield for example, has been in the field for over 3 1/2 years in south Florida exposure and shows no deterioration. This is what is important to Clearstar.

I am coating water-resistant canvas printed with pigmented inks. It is very humid and rainy in my environment. I am noticing light areas and white areas shifting to the yellow side. What is causing this?
We commonly see the yellowing occur on uncoated areas that are affected by moisture. We routinely coat a portion of a print and can see how the coated area stays white and the uncoated area shifts to the yellow. Most canvas (waterproof or not) will tend to color shift to the yellow side if it is left open or not stored correctly.
We think what you saw was a component of the moisture being absorbed into the canvas and potentially being trapped (albeit only for a period of time until the moisture migrates out through the coating). That could easily cause a shift, particularly on light colors. I would suggest you make a log book and record humidity in your studio during the coating process to see if you see a correlation between higher humidity and color shifts. I think you will find that is the issue. Ultimately, you may choose to dehumidify your coating area if this becomes a problem.

We always recommend ClearShield Type C for water resistant canvas applications.

I am printing with an eco-solvent printer. Which clear do you recommend?
Eco solvents and light solvents are utilized in many ink jet printers. These low volatility solvents are much slower to dry than traditional “solvent” ink jet inks. Because of this, there needs to be careful evaluation and planning as to what liquid laminate should be used and what the cure time requirement for both the ink and liquid laminate is.

Clearstar has done testing on a variety of “eco solvent” systems and has concluded the following:
We recommend the use of ClearShield Production Clear over eco and light solvent inks. For vehicle graphics, the addition of CX-100, our cross linking agent, will enhance alcohol, chemical, stain and abrasion resistance.

Our other systems such as CSX and VG are not recommended for eco-solvent or light solvent inks. For fast production methods, both the ink and the clear will need infrared or accelerated curing. Care in the selection of transfer tapes should also be considered.

If a solvent-based liquid laminate is preferred, we recommend the use of ClearJet Original formula and A-2000 aerosol.

More Information
Condition New
Laminate Brand ClearStar
Laminate Type Liquid
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