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(NEW) ZAR® Deck & Siding Clear Waterproof Wood Sealer

Clear protection against water penetration, preventing splitting and cracking.

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Product Overview

ZAR® Deck & Siding Clear Waterproof Wood Sealer protects without adding color to preserve and showcase the natural beauty of wood. It’s perfect for new, bare, or premium wood in excellent condition.

Coats: 1

Clean Up: Soap and water

Coverage: 100 – 400 square feet per gallon

Dry Time: 4 hours to touch, full cure: 24 hours

  • Restores and maintains natural color of wood
  • Protects against weather extremes
  • Resists mildew and UV damage
  • Can be applied in temperature extremes from 40 to 90 degrees
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  • Wood
ZAR  Decking & Siding Protecting Your Wood Deck
ZAR® Deck & Siding: Protecting Your Wood Deck

Be sure surface is free of all dirt, mildew stains, loose wood fibers and other foreign matter. To be effective, a stain must be able to penetrate. Surfaces must be sound and may be dry or damp. If damp, the wood should be free of puddles and not feel wet. Prepare previously stained or weathered surfaces with a solution of 13 cup heavy-duty laundry detergent to 1 quart household bleach to 3 quarts of warm water or a suitable deck cleaner. On untreated weathered surfaces, it is best to pressure wash (Pressure for soft wood (like cedar or pine) should be at about 500 to 600 pounds per square inch (psi); harder woods may tolerate more pressure, but you should not go higher than 1,200 psi. Use a fan tip with a 40- to 60-degree spread), but at minimum, scrubbing with a stiff bristle brush and rinsing with a garden hose should be done to completely remove all loose wood fibers. Sanding is best to remove any loose sand fibers.

Wait 72 hours for lumber that has undergone pressure treatment to dry completely. We expect that the wood from the lumber yard has been kiln dried. Check the board for tags and ask the hardware store staff.

If you have a moisture content reader, test multiple spots, ideally it should read 12% to 15% or less. If you find areas that are much higher than this do not apply stain until they have dried out. 

Without a moisture meter, The bead test” is a simple way to check if your wood is ready to be sealed. Pour a small amount of water on your deck. If the water beads up, there’s still some moisture in the wood. If the deck absorbs the water, then it’s dry enough to be sealed. 


Apply when air and surface temperatures are between 40°F (4.4°C) and 90°F (32°C). Avoid applying in direct sunlight. Apply with nylon or polyester brushes, stain pads or professional spray equipment. When spraying, always back-brush immediately. To ensure desired appearance and proper drying time, always finish a small test area before proceeding. Do not over apply. Shake and stir thoroughly before and during use. If project requires more than one container, blend all containers together to ensure uniformity. Apply to small sections at a time (1−3 boards); start at one edge of the board and work end-to-end, following through to the end of the boards to avoid lap marks. A one-coat application is recommended.

Airless Spray Application
Tip: .015” — .019” Filter: 60 mesh Fluid Pressure: 1,400 – 2,400 psi. Follow spraying immediately with a pad, back-brushing, or back-rolling for a uniform appearance.

Areas with harsh exposure to sun, weather or foot traffic will show wear more quickly than other surfaces. If this occurs, clean affected areas and recoat as necessary.


Dispose of contaminated absorbent, container and unused contents in accordance with local, state and federal regulations.


United Gilsonite Laboratories (UGL®) warrants ZAR® Deck & Siding Clear Waterproof Wood Sealer, subject to the limitations set forth herein, that this product , under normal use and proper storage, will be free from defects in material or workmanship and merchantable for a period of three (3) years on Decks and (5) years on Siding from the original date of purchase. This limited warranty extends to the original consumer purchaser of the product only and is non-transferable. If this product is found to be defective by UGL within the warranty period, you will receive a replacement of the product or, at UGL’s option, a full refund of the purchase price upon presentation of proof of purchase (original sales receipt). This limited warranty excludes failure to apply the product to a properly prepared bare surface in accordance with UGL’s instructions provided with this product. UGL MAKES NO FURTHER EXPRESS WARRANTIES. THIS LIMITED WARRANTY EXCLUDES (1) LABOR AND ALL OTHER COASTS ASSOICAED WITH THE APPLICATION OR REMOVAL OF THE PRODUCT OR ANY REPLACEMENT PROUDCT, AND (2) ANY INDIRECT, SPECIAL, EXEMPLARY, INCIDENTAL OR CONSEQUENTIAL DAMAGES. Some states do not allow the limitation or exclusion of incidental or consequential damages, so the able limitation or exclusion may not apply to you. This limited warranty gives you specific legal rights and you may also have other legal rights which vary from state to state. To make a warranty claim, please contact (with proof of purchase) the store where you purchased the product or contact UGL directly at 1−800−848−7253 (Consumer Hotline) or by mail to UGL Consumer Inquire Department, P.O. Box 70, Scranton, PA 18501 – 0070.

USAGE STATEMENT: Prior to use, carefully read the product label and follow the directions. For technical information, warnings, cautions, notices, and additional information, download and read the documentation available on this website.

California Residents: Prop 65 WARNING(S)

* WARNING: If you scrape, sand or remove old paint, you may release lead dust. LEAD IS TOXIC. EXPOSURE TO LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE, ESPECIALLY IN CHILDREN. PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE. Wear a NIOSH-approved respirator to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the National Lead Information Hotline at 1 – 800-424-LEAD or visit www​.epa​.gov/lead.