Thread locker sealing is widely used in automobiles, machinery, electronic, electrical appliances, hardware thread clamps, pipe thread sealing, clamp nuts, bolts, and screws in order to avoid vibration. The filler metal parts keep enough space between the screw and nut effectively for easy operation. Premium & safe formula. Not recommended for: plastics, especially thermoplastics Order weight over 1Lb will be shipped by Priority Mail. Defective items: 14 business days from date of receipt on items received not as described. All other returns – 30 business days from the date of receipt and all parts must be in their original condition. Parts damaged due to improper installation or abuse are not returnable. Buyer responsible for return shipping and original shipping cost, refund on item subject to a 20% re-stocking fee. Warranty seals may be present, seals are broken, tampered with or removed the warranty is void.