unfilled sealant

un·fill·ed seal·ant

(ŭn-fild sēlănt)
Resin-based sealant material that does not contain filler particles; has a low viscosity that permits deeper penetration into the pits and fissures of a tooth.
See also: sealant
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References in periodicals archive ?
If an unfilled sealant is used, occlusal adjustments are not required due to the "self-occluding" nature of the material.