This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A substance, such as sealing wax, used to seal a surface to prevent passage of a liquid or gas.

n. A plastic resin used in dentistry to coat the chewing surfaces of the back teeth to prevent the growth of cavity-causing bacteria.

n. Any material used to seal a surface so as to prevent passage of a fluid.

n. A mixture of polymers, fillers, and pigments used to fill and seal joints where moderate movement is expected.

n. a kind of sealing material that is used to form a hard coating on a porous surface (as a coat of paint or varnish used to size a surface)

sealing material   

caulk    caulking   

dental sealant    pit and fissure sealant    fissure sealant    sealant backing   

sealer    elastomer    thrombi    glue    hydrogel    lacquer    fungicide    injector    caulk    facepiece