Ntawm tus foob txhua yam ntaub ntawv yog ib qho tseem ceeb tau nyob pab tus zoo sealing ntawm lub tshuab. Xaiv khoom uas foob txhua yam mas raws li lub Cheebtsam foob txhua yam ntawm qhov chaw, xws li kub, ua hauj lwm siab, nruab nrab ua hauj lwm thiab ua hauj lwm hom. Yuav tsum yooj yim rau txhua yam ntaub ntawv sealing muaj raws li nram no:
1. ib yam txhua yam khoom, xws li ua tau tensile, elongation;
2. tsim nyog elasticity thiab hardness, me compression deformation lawm;
3. High thiab tsis kub kuj, tsis muaj decomposition thiab softening hauv kub, tsis tartar hauv tsis kub;
4. tau tshaj qhov nruab nrab ua hauj lwm, tsis o, decomposition, thiab cov qhov hauv koj;
5. zoo pa hauj thiab cov laus kuj, check;
6. puas kuj, tsis muaj corrosionrau cov co;
7. easy rau nqi zauv, tsis zoo lawm.