The formulation of strict liability that most courts use is Section 402A of the Restatement of Torts (Second), set out here in full:
(1) One who sells any product in a defective condition unreasonably dangerous to the user or consumer or to his property is subject to liability for physical harm thereby caused to the ultimate user or consumer, or to his property, if
(a) the seller is engaged in the business of selling such a product, and
(b) it is expected to and does reach the user or consumer without substantial change in the condition in which it is sold.
(2) This rule applies even though
(a) the seller has exercised all possible care in the preparation and sale of his product, and
(b) the user or consumer has not bought the product from or entered into any contractual relation with the seller.
Section 402A of the Restatement avoids the warranty booby traps. It states a rule of law not governed by the UCC, so limitations and exclusions in warranties will not apply to a suit based on the Restatement theory. And the consumer is under no obligation to give notice to the seller within a reasonable time of any injuries. Privity is not a requirement; the language of the Restatement says it applies to “the user or consumer,” but courts have readily found that bystanders in various situations are entitled to bring actions under Restatement, Section 402A. The formulation of strict liability, though, is limited to physical harm. Many courts have held that a person who suffers economic loss must resort to warranty law.
Strict liability avoids some negligence traps, too. No proof of negligence is required. See Figure 17.4".