Read the Label - CrownSeal

CrownSeal™ Trowelable Sealant is a proprietary elastomeric coating that forms a flexible waterproof membrane specifically formulated to repair and protect chimney crowns from water intrusion. CrownSeal can also be used for a variety of horizontal and vertical exterior waterproofing applications. It dries to a natural concrete/mortar appearance. CrownSeal is a long-lasting and durable coating that requires no mixing or special bonding agents.


Weather Conditions: Application temperature should be a minimum of 45°F and rising but not greater than 95°F. Do not apply if temperature is expected to drop below 45°F within twenty four hours or if rain is immenent. If necessary, cover with plastic.


Surface to be coated must be structurally sound, not loose. Surface must be clean and dry to slightly damp. Place drop cloths at base of chimney to protect roof from inadvertent spills.

1.) Brush surface to be coated with stiff poly or wire brush to remove loose particles.

2.) Lightly mist the entire crown with clean water from a spray bottle. DO NOT FLOOD. Misting with water will help to cool a warm crown as well as improve both the penetration and adhesion of the CrownSeal application.

3.) Apply to surface with a trowel, putty knife (plastic or metal), or 1/4” square notch trowel. Spread to a uniform thickness of no less than 1/8”. CrownSeal is most effective when applied at a thickness of 1/8” - 1/4” (1” max.).

4.) Lightly mist CrownSeal with water and smooth out trowel marks using a 4” nylon paint brush. On large applications complete one half of the crown at a time. Make sure base of flue tiles are thoroughly coated. Keep container closed when not in use.

Tips: To produce a clean edge and protect the brick just below the crown, place duct tape completely over the face of the top course or row of brick. Tape can also be applied to the flue tile approxroximately 1” from the base of the tile. Remove tape when CrownSeal application is complete.

Coverage Rates: At 1/8” thickness, 14-18 sq. ft. per gallon. At 1/4” thickness, 7-9 sq. ft. per gallon, depending on texture and porosity of surface to be coated.

Curing: Temperature, humidity, thickness of application and porosity of the surface to which CrownSeal is applied will affect the curing time of the product. For faster curing in cool weather, do not mist crown with water before application. Thinner films such as 1/8” will cure faster; thicker applications will cure more slowly and require longer protection from rain. CrownSeal will be dry to touch within several hours. Product will cure completely within 24-72 hours depending on above factors. A plastic covering may be used if rainfall is expected before product is cured.

Clean-Up: Remove CrownSeal from tools immediately after each use by scrubbing with a brush and water. To clean inadvertent spills from roofs, etc., remove excess and clean remaining CrownSeal with a stiff nylon scrub brush and water. Rinse thoroughly. 



Danger! Skin and Eye Irritant. May cause cancer. Keep out of reach of children. Do not take internally.

FIRST AID: Never give anything by mouth to an unconscious person. If inhaled: Move away from contaminated area and assure fresh air breathing. If swallowed: Rinse mouth, call a physician immediately. Do not induce vomiting unless directed to do so by a physician. For skin contact: Wash with warm soapy water. If irritation persists get medical advice/attention. For eye contact: Immediately flush with water for at least 15 minutes and get prompt medical attention if necessary. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention immediately. For additional information on this product, consult the product data sheet and SDS for this product available at


SaverSystems warrants that CrownSeal, when used to coat or repair masonry chimney crowns, will remain intact and in place for ten years from the date of application when properly applied by a professional contractor to a residential chimney crown according to label instructions. This warranty does not cover spalling, abrading, faulty construction and/or other defects which might erode coated surfaces. If CrownSeal fails to perform as specified, SaverSystems will furnish, as sole remedy, enough CrownSeal to correct the condition. This warranty does not include labor or cost of labor for the application of CrownSeal. SaverSystems shall not be liable for incidental or consequential damages resulting from any breach of this warranty and fitness for use. Some states do not allow the exclusion of incidental or consequential damages, so the above exclusions may not apply to you. This warranty gives you specific legal rights. You may also have other rights which vary from state to state.

Non-photochemically reactive

VOC Content: 206 gr./lt.